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XFree Local Multi-User HOWTO

Svetoslav Slavtchev

<svetoslav (at) users.sourcefourge.net>

Aug 2004
Revision History                                                             
Revision 1.4            2004-08-14             Revised by: SS                
add some info on the new IsolateDevice XFree/X.org, drop some stalled        
comments about ruby-2.6 (a lot more must be removed - linux-2.6 is table now)
Revision 1.3            2003-11-11             Revised by: SS                
Ruby-2.6 is working :) , sync to new BRuby, add config file paths for Gentoo 
Revision 1.2            2003-09-17             Revised by: SS                
Lots, lots of stuff. the most major things: XFree-PrefBusID v3, input.rc (and
exp. service ruby_init), add "Known Limitations"                             
Revision 1.1            2003-07-14             Revised by: SS                
sync input agent with examples, a bit more about ruby, less Fix-Me's,        
additions to video compatibility                                             
Revision 1.0            2003-05-13             Revised by: TP                
Initial release, reviewed by LDP.                                            


 This HOWTO explains one of the ways to get a working, multiple, local X
user-capable PC system for up to 16 users. It is based on using a modified
Linux kernel with support for multiple independent users . The second way is
not covered here, but on the web page of it's author, the pioneer Miguel
Freitas.

-----------------------------------------------------------------------------
Table of Contents
1. Introduction
    1.1. About Backstreet Ruby/ Ruby
    1.2. About this document
    1.3. Related Documentation
    1.4. New versions of this document
    1.5. Copyright and License
    1.6. Disclaimer
    1.7. Credits/Contributors
    1.8. Feedback/Bug Reporting
   
   
2. Before we begin
    2.1. Known Limitations
    2.2. XFree configuration files
    2.3. Reusing Xinerama configured XFree
    2.4. Binary packages
   
   
3. Installing the kernel
    3.1. Installing the Backstreet Ruby/ Ruby-2.6 kernel
    3.2. Notes on building your own kernel
    3.3. Creating needed device files
    3.4. Notes on using multiple VT's & VGA console
    3.5. Keyboard numbering(order of detection)
   
   
4. Setting up the X servers
    4.1. Do I need a modified X server?
    4.2. Installing and Configuring XFree-PrefBusID
    4.3. Creating symbolic links
    4.4. Using independent keyboards with XFree
    4.5. Using independent mice with XFree
    4.6. For graphic cards without DRI
    4.7. Nvidia GLX & DRI
   
   
5. More on configuring input devices
    5.1. Finding the real devices
    5.2. Using hotplug with input.agent and input.rc
    5.3. Using XFree with event interface support
    5.4. Using the "Phys" descriptor and USB devices
   
   
6. Configuring display managers
    6.1. Configuring xdm and kdm
    6.2. Configuring gdm
   
   
7. Tweaking it
    7.1. Using independent sound cards
    7.2. Customising the login screen
    7.3. 1st X server configuration file
    7.4. Number X servers started by Display managers
    7.5. Dynamically switching the number of X servers
   
   
8. Known problems
    8.1. Hardware problems
    8.2. Software problems
   
   
9. Special notes on some distributions
    9.1. Mandrake
    9.2. Red Hat
    9.3. Debian
    9.4. SuSE
   
   
10. Final words
A. Video Compatibility list
    A.1. Graphic card pairs/triples that work perfectly
    A.2. Graphic card pairs/triples that work, but with some glitches
   
   
B. Example configuration files
    B.1. XFree86
    B.2. Display managers
    B.3. Configuration files for Input Agent
   
   
C. Scripts
    C.1. hotplug: input.agent
    C.2. hotplug: input.rc
    C.3. hotplug & XFree supporting event devices: input.agent
    C.4. Wrapper for starting X using Nvidia libGL.so
    C.5. For installing Nvidia drivers for parallel use with DRI
   
   
D. Experimental Backstreet Ruby configuration Script/ Service
    D.1. README.ruby_init explains how to configure and use the service.
    D.2. The global configuration file /etc/sysconfig/ruby.conf
    D.3. The ruby_init service /etc/init.d/ruby_init
    D.4. Modified hotplug input.agent /etc/hotplug/input.agent
   
   

-----------------------------------------------------------------------------
Chapter 1. Introduction

1.1. About Backstreet Ruby/ Ruby

Backstreet Ruby is a kernel patch for the Linux kernel. It is a back port to
Linux-2.4 of the Ruby kernel tree, which is developed by the Linux Console
Project. The aim of the Linux Console developers is to enhance and reorganize
the input, the console and the framebuffer subsystems in the Linux kernel, so
they can work independent from each other and to allow multi-desktop
operation. All this is done in the Ruby kernel tree which is based on the
development Linux-2.5 kernel. The new Input subsystem and the new Framebuffer
layer are already integrated in Linux-2.5 kernel, but as the main developer
of the Linux Console Project, James Simmons, is too busy with completing the
rewrite of the framebuffer layer in Linux-2.5, the multi-desktop operation
will not be integrated in the next stable Linux kernel (Linux-2.6).

So Backstreet Ruby brings to the current stable Linux kernel (Linux-2.4) the
enhanced input subsystem and the ability to use multiple graphic cards and
multiple keyboards independently, in order to make multiple local XFree users
on a single PC system possible.

You can have multiple independent graphic cards and multiple independent
mice, but in order for multiple users to interact with the system, they do
need independent keyboards as well. Multiple independent keyboards is the
feature that Linux-2.4 (and in the future Linux-2.6) lacks, and this is what
Backstreet Ruby adds to the stable Linux kernel Linux-2.4.

The entire work on back porting Ruby to Linux-2.4 is done by Aivils Stoss. <
Aivils.Stoss (at) unibanka.lv>

Aivils got recently his hands on Ruby, and now Ruby is fully functional[1]
too, so if you prefer the Linux-2.6 kernel you might use Ruby instead of
Linux-2.4 + Backstreet Ruby.

Visit his web site for more information on the patch itself, on the current
status, how to build a kernel using his patch or how to build modified
XFree86 server.

You can find it here:[http://startx.times.lv/] http://startx.times.lv

There are also several mirrors

 1. in the United States:
   
    [http://people.debian.org/~andreas/aivils/] http://people.debian.org/
    ~andreas/aivils/
   
 2. in Germany:
   
    [http://www.schuldei.org/aivils/] http://www.schuldei.org/aivils/
   
 3. in the United Kingdom:
   
    [http://karlovo.demon.co.uk/~svetlio/aivils/] http://karlovo.demon.co.uk/
    ~svetlio/aivils/
   

The address of the Linux Console Project is: [http://linuxconsole.sf.net]
http://linuxconsole.sf.net
-----------------------------------------------------------------------------

1.2. About this document

This document explains how to configure your system for multiple local XFree
users using the enchanted console/input subsystem in the Backstreet Ruby/
Ruby-2.6 kernel .

I will use :

��*�"Backstreet Ruby" or "BRuby" to refer to the back port to Linux 2.4
   
��*�"Ruby" or "Ruby-2.6" to refer to the original Ruby kernel tree for Linux
    2.6
   

Every mention of Backstreet Ruby should be replaceable by Ruby/ Ruby-2.6
unless else mentioned.

Note Note                                                                    
�    Currently it is not possible to set up systems for multiple console     
     users.                                                                  

There are two ways of setting up multiple local XFree users:

 1. Modify the kernel to ignore input from USB keyboards and add the handling
    of USB keyboards to a modified Xserver. This solution was developed by
    Miguel Freitas. Visit his page on the topic at [http://
    cambuca.ldhs.cetuc.puc-rio.br/multiuser/] http://
    cambuca.ldhs.cetuc.puc-rio.br/multiuser/, for instructions on how to set
    up such a system.
   
 2. Use the Backstreet Ruby kernel which supports independent keyboards.
   

I'll concentrate on configuring a system for multiple local XFree users using
the Backstreet Ruby kernel, but there are parts which can be used also on a
system using the solution from Miguel Freitas.

Note Note                                                                    
�    This document is not intended to be a replacement of the existing       
     documentation on the Backstreet Ruby home page ([http://startx.times.lv 
     /] http://startx.times.lv), but rather, this is a HOWTO, explaining the 
     way to a working X multi-user PC system. If you encounter any problems  
     you'll probably need to consult the more detailed information there.    
                                                                             
     The document is based on the file system layout of the Mandrake-Linux   
     distribution, but I tried to make it distribution-independent by        
     including information about the differences to other mainstream         
     distributions like Debian, Red Hat and SuSE Linux.                      
-----------------------------------------------------------------------------

1.3. Related Documentation

��*�The Linux Console Project
   
    [http://linuxconsole.sourceforge.net] http://linuxconsole.sourceforge.net
   
��*�The Backstreet Ruby home page
   
    [http://startx.times.lv/] http://startx.times.lv/
   
��*�XFree with support for the new input layer by Zephaniah Hull
   
    (seems the patches are obsolated, and were removed from the site)
   
    [http://people.debian.org/~warp/evdev/] http://people.debian.org/~warp/
    evdev/
   
��*�Miguel Freitas' page on multiple local XFree users
   
    [http://cambuca.ldhs.cetuc.puc-rio.br/multiuser/] http://
    cambuca.ldhs.cetuc.puc-rio.br/multiuser/
   
��*�Russian multi-terminal project Gorinich
   
    [http://www.ctc.msiu.ru/zg/main.html] http://www.ctc.msiu.ru/zg/main.html
   
��*�Step by step instructions by Jean-Daniel Pauget
   
    [http://disjunkt.com/dualhead/] http://disjunkt.com/dualhead/
   
��*�Multi-seat XFree solution under Linux with framebuffers, by Frode Trydal
   
    [http://www.itsopen.net/projects/x-hack/] http://www.itsopen.net/projects
    /x-hack/
   

-----------------------------------------------------------------------------
1.4. New versions of this document

You can find the latest stable version of this How-To at The Linux
Documentation Project web site:

[http://tldp.org/HOWTO/XFree-Local-multi-user-HOWTO/index.html] http://
tldp.org/HOWTO/XFree-Local-multi-user-HOWTO/

and the latest unstable version :

[http://karlovo.demon.co.uk/~svetlio/ruby-contrib/how-to/
XFree_local_multi-user-HOWTO/] http://karlovo.demon.co.uk/~svetlio/
ruby-contrib/how-to/XFree_local_multi-user-HOWTO/
-----------------------------------------------------------------------------

1.5. Copyright and License

  This document, XFree-Local-multi-user-HOWTO, is copyrighted (c) 2003 by 
Svetoslav Slavtchev.

  Permission is granted to copy, distribute and/or modify this document under
the terms of the GNU Free Documentation License, Version 1.1 or any later
version published by the Free Software Foundation; with no Invariant
Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of
the license is available at [http://www.gnu.org/copyleft/fdl.html]   http://
www.gnu.org/copyleft/fdl.html.

  Linux is a registered trademark of Linus Torvalds.

  NVIDIA is a registered trademark of NVIDIA Corporation.
-----------------------------------------------------------------------------

1.6. Disclaimer

  No liability for the contents of this document can be accepted. Use the
concepts, examples and information at your own risk. There may be errors and
inaccuracies, that could be damaging to your system. Proceed with caution,
and although this is highly unlikely, the author(s) do not take any
responsibility.

  All copyrights are held by their by their respective owners, unless
specifically noted otherwise. Use of a term in this document should not be
regarded as affecting the validity of any trademark or service mark. Naming
of particular products or brands should not be seen as endorsements.
-----------------------------------------------------------------------------

1.7. Credits/Contributors

  In this document, I have the pleasure of acknowledging:

��*�James Simmons <jsimmons (at) transvirtual.com >
   
    for working so hard on Linux console project, for developing the new
    framebuffer, VT/console subsystem
   
��*�Vojtech Pavlik<vojtech (at) suse.cz>
   
    for rewriting the input subsystem and working hard on the Linux console
    project
   
��*�Aivils Stoss <Aivils.Stoss (at) unibanka.lv>
   
    for back porting Ruby to linux-2.4 and providing his back port and
    experiences to the world
   
��*�Andreas Schuldei <andreas (at) schuldei.org>
   
    for providing Debian packages, comments about Debian
   

-----------------------------------------------------------------------------
1.8. Feedback/Bug Reporting

Feedback is most certainly welcome for this document. Send your additions,
comments and criticisms to the following email address : <svetoslav (at)
users.sourcefourge.net>.

In case you experiance troubles in configuring the system, feel free to
contact me or the linuxcosnole mailing list.

Please send as much details as possible, the most important information would
be (from a running Backstreet Ruby kernel):

��*�output from dmesg
   
��*�output from lsmod
   
��*�output from cat /proc/bus/console/*/*
   
��*�contents of /proc/bus/input/devices
   
��*�contents of /proc/bus/usb/devices
   
��*�contents of the XFree configuration file(s) /etc/X11/XF86Config(-4)
   
��*�contents of the XFree86 log files /var/log/XFree86.[n].log
   

-----------------------------------------------------------------------------
Chapter 2. Before we begin

-----------------------------------------------------------------------------
2.1. Known Limitations

XFree does not support DRI acceleration on multiple graphic cards. The only
way to get multiple accelerated X sessions is to use Nvidia's closed source
driver and GL library or a single card using DRI and multiple cards using
Nvidia's closed source drivers. XFree extensions not dependent on DRI should
work.

Most of the multiheaded graphic cards can be used only for a single user/
display. In order to start independent X servers the heads have to be
explicitly addressable (which can not be done with most of the cards). It
should be possible to use cards with explicitly addressable heads for
independent displays, but this has not yet been tested.

In the following cases it might be possible to use a single multiheaded card
for multiple independent displays :

��*�The card(s) have different PCI Bus ID's for the different heads
   
    (for example Matrox MMS G200/G450)
   
��*�The card(s) register frame buffer device for each head (only with the
    Linux-2.5/2.6 patch)
   
    Have in mind that the XFree frame buffer driver does not support
    acceleration and most of the XFree extensions.
   
    (for example Matrox G400DH, G450DH, G550DH)
   

Using/configuring independent devices for the independent screens/users is
pretty hard or not explored. Exceptions are the input devices, graphic cards
and sound thanks artsd. Some examples of such unexplored areas:

��*�External storage device (USB/Firewire hard disks, CD/DVD drives, ZIP/
    Floppy drives, memory sticks, ....
   
��*�USB/Firewire printers, scanners, cameras ...
   

In case you succeed in configuring such devices for independent usage by
multiple users, please share with us how you did it.

Note Note                                                                    
�    This doesn't mean that the devices won't work, but that every user will 
     have access to all devices.                                             

Currently under Backstreet Ruby/ Ruby you can have a maximum of 16 Virtual
Terminals (8 for Backstreet Ruby released before 7 Oct 2003). This means that
without hotplug configured if you are using USB keyboards with fancy keys you
are limited to maximum of 8 independent users ( for older versions Backstreet
Ruby - 4 users). So do use hotplug if you are going to setup a system for
more then 4 users ( even systems with 2 attached USB keyboards benefit from
using hotplug).

If you are using hotplug the maximal number of independent users is 16 for
Backstreet Ruby / Ruby-2.6 and 8 for older versions Backstreet Ruby.
-----------------------------------------------------------------------------

2.2. XFree configuration files

You should configure each of your video cards to work properly with a single
X server, which is actually beyond the scope of this document. You should
refer to the documentation that came with your distribution, but some general
hints couldn't hurt.

The easiest way would be to use the same kind of monitors & video cards, you
could then configure only the first card/monitor pair, make copies of this
configuration file for the number of video cards you have, and then only
adjust the BusID "PCI:x:xx:x" field in the configuration file. You can do
this with the help of lspci, XFree86 -scanpci -verbose , or other similar
distribution-specific tools.

You could use a similar approach if you have only monitors or video cards of
the same type.

Most modern distributions also have advanced tools for easier configuration
of Xinerama. You can use these tools to set up the system for Xinerama and
then use this configuration file for generating the configuration files for
the different X servers. You can use an example configuration file, replacing
video card and monitor section, by the corresponding sections from the
Xinerama XFConfig-4 file.

Other useful resources:

��*�[http://www.tldp.org/HOWTO/XFree86-HOWTO/index.html] The Linux XFree86
    HOWTO
   
��*�[http://www.tldp.org/HOWTO/XFree86-Video-Timings-HOWTO/index.html]
    XFree86 Video Timings HOWTO
   
��*�[http://www.tldp.org/HOWTO/XWindow-Overview-HOWTO/index.html] X Window
    System Architecture Overview HOWTO
   
��*�[http://www.tldp.org/HOWTO/XWindow-User-HOWTO/index.html] The X Window
    User HOWTO
   

-----------------------------------------------------------------------------
2.3. Reusing Xinerama configured XFree

If you have a system configured for Xinerama, you can easily adjust the XFree
configuration file so you can use it for multiple users.

This will allow you to easily switch between a multi-user environment and a
Xinerama multi-monitor environment.

What is Xinerama and how does the system configured using this HOWTO differ
from a system using the Xinerama extensions in XFree?

The Xinerama extensions were introduced to the XFree86 system in version 4.0.
Xinerama is an extension to XFree86 Release 6 Version 4.0 (X4.0) which allows
applications and window managers to use the two (or more) physical displays
as one large virtual display. In case Xinerama is not used, applications can
only reside on one of the displays and can not be moved between the two.
Window managers had to be specially written to support the two displays. With
Xinerama, window managers and applications don't have to be specially written
to support the larger "Virtual Desktop" Xinerama creates.

Just the opposite, the primary goal of a system configured according to this
HOWTO is to offer multiple independent displays for several users on a single
PC system.

For more information on Xinerama read:

��*�[http://www.tldp.org/HOWTO/Xinerama-HOWTO/index.html] Xinerama-HOWTO,
    Using Xinerama to MultiHead XFree86 v.4.0+
   

-----------------------------------------------------------------------------
2.4. Binary packages

Binary rpms of modified XFree servers are currently available for Mandrake
8.2/ 9/ 9.1/ 9.2, Red Hat 8/ 9, SuSE 8.1. If you're running other rpm-based
distributions please help me to prepare and rebuild packages, so other users
can get pre-compiled binaries. Currently the binary rpm packages are not
mirrored and are only available from [http://karlovo.demon.co.uk/~svetlio/
ruby-contrib] http://karlovo.demon.co.uk/~svetlio/ruby-contrib.

Binary packages for Debian Sid are also available thanks to Andreas Schuldei
at [http://www.schuldei.org/debian/bruby] http://www.schuldei.org/debian/
bruby, or as apt repository "deb http://www.schuldei.org/debian/bruby ./ ".
-----------------------------------------------------------------------------

Chapter 3. Installing the kernel

Note The installation of Ruby-2.6 is not fully covered, partly because there 
     are almost no differences compared to the installation of Linux-2.6     
     kernel, partly because I have not gathered enough experience with       
     Ruby-2.6 yet, so any comments and questions are welcomed.               
                                                                             
     If you are going to use Ruby-2.6, please do install Linux-2.6 without   
     the Ruby-2.6 patch first and configure your system for it, in order to  
     avoid tracking "Ruby-2.6 Bugs" which are actually due to a not properly 
     configured system because of the Linux-2.4 -> Linux-2.6 changes. A good 
     starting point is probably [http://www.codemonkey.org.uk/docs/          
     post-halloween-2.6.txt] http://www.codemonkey.org.uk/docs/              
     post-halloween-2.6.txt" .                                               

-----------------------------------------------------------------------------
3.1. Installing the Backstreet Ruby/ Ruby-2.6 kernel

Now it's time to install the kernel.

The easiest way would be to pull an already prepared binary kernel; there are
packages for some distributions (currently only Mandrake and Debian) or a
source package, and rebuild it on your system.

If for some reason you cannot use them or have problems using them you can
also build your own kernel with the Backstreet Ruby/ Ruby-2.6 patch. For more
information how to do this visit the Backstreet Ruby page on building and
installing the kernel: [http://startx.times.lv] http://startx.times.lv (or
some of the mirrors) -> Documentation -> Quick Kernel.

(If you are new to Linux, reading "The Linux Kernel HOWTO", [http://tldp.org/
HOWTO/Kernel-HOWTO.html] http://tldp.org/HOWTO/Kernel-HOWTO.html, could be
very helpful.)

You can find binary kernel packages for Mandrake at [http://
karlovo.demon.co.uk/~svetlio/ruby-contrib/] http://karlovo.demon.co.uk/
~svetlio/ruby-contrib/.

Debian binary kernel packages are available at [http://www.schuldei.org/
debian/bruby] http://www.schuldei.org/debian/bruby, or as apt repository "deb
http://www.schuldei.org/debian/bruby ./ "

Note Note                                                                        
�    ��*�If you are going to use USB input devices, it's recommended to use the  
         hid driver instead of usbkbd/ usbmouse.                                 
                                                                                 
     ��*�Upon loading the hid driver, you might get the following error message: 
                                                                                 
         [root@svetljo RPM]# modprobe hid                                        
         modprobe: Can't locate module keybdev which is needed for hid           
         [root@svetljo RPM]#                                                     
                                                                                 
         The reason is that in some version of the module-utils package this     
         dependency is hardcoded, but overrideable, so you should override it by 
         adding "above hid usbcore" to your /etc/modules.conf                    
                                                                                 
                                                                                 
-----------------------------------------------------------------------------

3.2. Notes on building your own kernel

There are some things I would like to mention, although I won't go in
details, as the Backstreet Ruby page on compiling the kernel discusses this
topic.

 1. You have to follow this order:
    Input support                                                            
    Virtual Terminal support                                                 
    Console drivers                                                          
                                                                             
   
    for all required options to be available/selectable.
   
 2. You have to use built in input support:
    Input device support --> Input devices (needed for keyboard, mouse,..)   
    Input device support --> Mouse support                                   
                                                                             
   
 3. I would suggest you also include at least one keyboard (built in - not as
    a module). You can also use modules, but I find it safer to be able to
    use a keyboard instead of trying to find a PC with ssh (or something
    similar) to load the required modules.
   
    For AT/PS2 keyboards, turn on (not modules):
    Input device support --> Serial i/o support                              
    Input device support --> i8042 PC Keyboard controller                    
    Input device support --> Keyboards                                       
    Input device support --> AT keyboard support                             
                                                                             
   
    For a USB keyboard turn on (not modules):
    Input device support --> Keyboards                                       
    USB support --> support for USB                                          
    USB support --> USB Host Controller Drivers                              
    USB support --> USB Human Interface Device (full HID) support            
    USB support --> HID input layer support                                  
                                                                             
   
 4. If you are new to Linux, do not try to patch an already patched kernel
    (heavily patched kernels like the ones that ship with most
    distributions). Use a kernel from [http://www.kernel.org] www.kernel.org,
    and take a look at the [http://www.tldp.org/HOWTO/Kernel-HOWTO/] Linux
    Kernel HOWTO.
   

Note Note                                                                    
�    In Backstreet Ruby (the patch for a 2.4 Linux kernel) does not support  
     frame buffer devices , and for that reason is disabled.                 
                                                                             
     In Ruby (the patch for 2.6 Linux kernel) if you want to disable/ change 
     to modules support for PS2 input devices, you have to first activate/   
     enable "General setup --> Remove kernel features (for embedded systems)"
-----------------------------------------------------------------------------

3.3. Creating needed device files

If you are not using the devfs file system, you might need to create several
device files needed for the new input sub-system in the Backstreet Ruby
kernel:

Note Note                                                                    
�    Most current distributions should already provide the necessary device  
     files, so try booting Backstreet Ruby without creating the device files 
     and in case you don't miss input devices omit this section. Any         
     distribution that came with XFree-4.3.0 and linux-2.4.20 should provide 
     these device files.                                                     
cd /dev                                                                      
mkdir input.old                                                              
mv mouse js? input.old                                                       
mkdir input                                                                  
cd input                                                                     
mknod js0 c 13 0                                                             
mknod js1 c 13 1                                                             
mknod js2 c 13 2                                                             
mknod js3 c 13 3                                                             
mknod mouse0 c 13 32                                                         
mknod mouse1 c 13 33                                                         
mknod mouse2 c 13 34                                                         
mknod mouse3 c 13 35                                                         
mknod mice c 13 63                                                           
mknod event0 c 13 64                                                         
mknod event1 c 13 65                                                         
mknod event2 c 13 66                                                         
mknod event3 c 13 67                                                         
cd ..                                                                        
ln -s input/js0 js0                                                          
ln -s input/js1 js1                                                          
ln -s input/mice mouse                                                       
                                                                             

If you use devfs, all required devices will be created automatically by
devfs.

Mandrake is an example of one distribution that uses devfs. Debian does not
use devfs by default, but the kernel supports devfs; in order to activate
devfs you have to add "devfs=mount" to the "append" line of your boot loader
and install devfsd (the devfs demon). Distributions that do not use devfs are
Red Hat and SuSE.

You can check whether devfs is used by issuing the following commands:

��*�To check whether support for devfs is enabled in your kernel
   
    cat /proc/filesystems | grep devfs
   
��*�To check whether devfs is used/mounted
   
    mount | grep devfs
   

If you get an empty string this means that devfs is not used; if you get
something like the following output, devfs is activated:
[root@mc contrib]# cat /proc/filesystems | grep devfs                        
nodev   devfs                                                                
nodev   usbdevfs                                                             
[root@mc contrib]# mount | grep devfs                                        
none on /proc/bus/usb type usbdevfs (rw)                                     
none on /dev type devfs (rw)                                                 
[root@mc contrib]#                                                           
                                                                             
-----------------------------------------------------------------------------

3.4. Notes on using multiple VT's & VGA console

As the frame buffer layer is not back-ported to Linux-2.4, only the primary
graphic card is initialized during the boot process. Secondary graphic cards
can only be initialized by an X server, so under Backstreet Ruby you will
have a single VGA text console on the primary graphic card.

Ruby for Linux-2.6 supports framebuffer devices and single framebuffer
console (which takes over the VGA console), but support for multiple VT's
through framebuffer consoles is not yet ready.

To keep VGA console properly working it is important first to be started the
XFree instance which will drive the graphic card which is used for VGA
console(the graphic card defined as primary in BIOS).
-----------------------------------------------------------------------------

3.5. Keyboard numbering(order of detection)

In the following chapters you will read about 1st keyboard, 2nd keyboard and
so on, so here I will explain what is meant by n-th keyboard.

When a keyboard device is found, it is bound to a free VT (given that there
are free VT's). The first keyboard found will be bound to VT0 (tty1-tty16),
the second to VT1 (tty17), the third to VT2 (tty18).

Note Note                                                                    
�    Older versions of the bruby patch (released before Oct 7 2003) use :    
                                                                             
     first keyboard found => VT0 (tty0-tty7)                                 
                                                                             
     second => VT1 (tty8-tty15)                                              
                                                                             
     third => VT2 (tty16-tty23)                                              

The order of detecting the keyboards depends on the configuration of your
kernel :

��*�If you are using kernel with integrated USB input the USB keyboard
    devices will be registered first, then the AT/PS2 keyboards will follow
    when the modules are loaded
   
��*�If you are using kernel with integrated PS2 input the AT/PS2 keyboard
    devices will be registered first, then the USB keyboards will follow when
    the modules are loaded
   
��*�If you are using kernel with integrated PS2 & USB input the AT/PS2
    keyboard devices will be registered first, then the USB keyboards will
    follow
   

But there are some caveats:

Most USB keyboards represent themselves as more than one keyboard; it is
common that the multimedia keys or the number-pad identify themselves as a
different keyboard device. So if you are running a kernel with integrated USB
input and have one USB keyboard with multimedia keys and one PS2 keyboard,
the USB keyboard will be bound to VT0(real keyboard) and VT1(multimedia
keys), the PS2 keyboard will be bound to VT2 (in case you have enough DUMB
consoles).

There are several ways to work around these issues. Here I'll explain the
easiest way to follow. It's definitely not the best one, but the shortest
explanation, and I just want to make it clear to you that the problem is not
that big. The better solutions will follow later in their own section.

All you need to do is to start the Backstreet Ruby/ Ruby kernel with dumbcon=
n , where n is the sum of your AT/PS2 keyboards plus the sum of your USB
keyboards multiplied by 2 (I suppose this is the maximum number of interfaces
a USB keyboard registers), so all keyboards will be bound to a VT. Now you
should find out which VT's the real keyboards are bound to (the keyboards
excluding the multimedia keys) and start X using the appropriate tty ranges.
Thanks to the proc interface integrated in Backstreet Ruby, you can easily
find the assignment of keyboards to VT's. Each VT creates a file /proc/bus/
console/[n]/keyboard (n is the number of the VT, for VT0 n will be 00, for
VT1 - 01, ... , for VT11 - 11); reading this file will give you the assigned
keyboard.

[root@svetljo root]# cat /proc/bus/console/*/*                               
usb-00:10.1-1.1/input0                                                       
usb-00:10.1-1.1/input1                                                       
isa0060/serio0/input0                                                        
tells us that:

��*�USB keyboard (real) is bound to VT0
   
��*�USB keyboard (multimedia keys) is bound to VT1
   
��*�PS2 keyboard is bound to VT2
   

Now we can start X on the VT's with real keyboards, in this case VT0 and VT2.

Of course in this simple example with only 2 keyboards (one USB and one PS2)
the problem could be easily avoided by using a kernel with primary PS2 input
support. The PS2 keyboard would be found first and bound to VT0, the USB
keyboard would follow and it's real keyboard interface would be bound to VT1,
so there is no need for additional dumb consoles (for the multimedia
interfaces of USB keyboards).
-----------------------------------------------------------------------------

Chapter 4. Setting up the X servers

Now its time to configure XFree.
-----------------------------------------------------------------------------

4.1. Do I need a modified X server?

Note Note                                                                    
�    For some video cards you can skip this part. Before installing the      
     modified X server check the Video Compatibility list to determine       
     whether you need one. Currently there are reports for working           
     configurations without using a modified X server for Voodoo Graphics as 
     primary and Voodoo3 or Nvidia TNT2 as secondary.                        

"Why should a modified X server be used?" - The reason is that XFree is
designed to serve a single user and this design requires a single X server to
drive all available graphic cards. So when an unmodified X server starts, it
disables access to graphic cards for other X servers. Hence we have to modify
XFree to make it possible more then one X server to run at the same time.

��*�"The experimental way": you can use the "hackvideo"(ignoring pci_disable
    XFree commands) feature of the Backstreet Ruby kernel. This will allow
    you to use the XFree server that came with your distribution (no need for
    installing modified XFree server).
   
    Q: "Why experimental?"
   
    A: Well, you have to find out whether it works with your combination of
    graphic cards. There are some combination that works flawlessly, but the
    majority of tested combinations have problems with this setup.
   
   
��*�"The surer way": you have to install XFree server modified with the
    Prefered Bus ID patch.
   
    Q: "Why surer?"
   
    A: Because it works with all "supported graphic cards", solves a lot of
    stability problems and makes it possible to use VGA console on the
    primary graphic card.
   
   

If you decide first to try without installing a modified X server, follow
these steps:

 1. To enable this feature you have to add this to your XFree configuration
    file:
    Section "ServerFlags"                                                    
    ...                                                                      
    Option "PciOsConfig" "1"                                                 
    ...                                                                      
    EndSection                                                               
   
   
 2. and to inform the kernel to filter unnecessary PCI commands:
    [root@mc contrib]#echo  "1"> /proc/bus/pci/hackvideo                     
   
   
 3. If you want this to be done automatically on every boot you have to add :
    if [ -x /proc/bus/pci/hackvideo ];then                                   
          /bin/echo "1"> /proc/bus/pci/hackvideo                             
    fi                                                                       
   
    to your init scripts, preferably somewhere at the end of /etc/rc.d/
    rc.sysinit (so the command is executed before X is started)
   
   
 4. If you want to disable this functionality you have to:
    [root@mc contrib]# echo "0"> /proc/bus/pci/hackvideo                     
   
   

Note Note                                                                    
�    This functionality exists in the Backstreet Ruby kernel since 15. May   
     2003 and in Ruby-2.6 since 29. Sep 2003 , but will never be added to the
     official linux kernel as it is a small hack to spare you installing     
     modified X server.                                                      
                                                                             
     It is still recommended to install modified X server.                   
-----------------------------------------------------------------------------

4.2. Installing and Configuring XFree-PrefBusID

 1. Install the modified XFree server.
   
    ��+�Install an already built, but not packaged, modified X server and
        create the necessary symbolic links. You can get such binaries from
        the Backstreet Ruby home page, at [http://startx.times.lv] http://
        startx.times.lv.
       
    ��+�Help us (as well other people using your distribution) in building an
        rpm or binary for your distribution (we lack systems installed with
        all available distributions, so we are not able to build packages for
        every distribution).
       
    ��+�To patch and rebuild XFree from source using the instructions on the
        Backstreet Ruby page. Go to the Documentation section, at [http://
        startx.times.lv] http://startx.times.lv (or some of the mirrors) ->
        Documentation -> Quick XFree.
       
   
 2. Find the BusID of your graphic cards
   
    Note Note                                                                
    �    For AGP cards, something similar to "1:0:0"                         
                                                                             
         For PCI cards, something similar to "0:xx:0"                        
   
    ��+�In most cases you will find the BusID already set in the device
        section of the XFree configuration file.
       
        (Virtually always in case XFree is configured for Xinerama.)
       
    ��+�If it is missing you can use lspci, XFree86 -scanpci -verbose or
        other similar tools that came with your distribution.
       
        With lspci look for "VGA compatible controller" or other similar
        tools that came with your distribution.
        root@svetljo mnt]# lspci | grep "VGA compatible controller"                           
        00:0d.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 420] (rev a3) 
        01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV200 QW [Radeon 7500] 
        [root@svetljo mnt]#                                                                   
       
        With XFree86 -scanpci -verbose , or in case XFree is already running 
        XFree86 :1 -scanpci -verbose and look for your graphic cards:
        [root@svetljo mnt]# XFree86 :1 -scanpci -verbose                                               
        ......                                                                                         
        (0:13:0) unknown card (0x1462/0x8852) using a nVidia Corporation NV17 [GeForce4 MX 420]        
        ......                                                                                         
        (1:0:0) unknown card (0x1002/0x0f2a) using a ATI Technologies Inc Radeon RV200 QW [Radeon 7500]
       
   
 3. Configure XFree-PrefBusID. You have the following choices with the same
    effect:
   
    ��+�Use the XFree config file option "SingleCard" , requires as argument
        a boolean value(true/false), added in patch version 3
       
        For use in multi-user environment set to true, for standard XFree
        behavior(single X server allowed) to false or comment out/ delete the
        line.
       
        Note This functionality is inlcuded the xorg-x11 packages for        
             Mandrake and in Debian Sid XFree86 packages.                    
       
    ��+�Use the XFree config file option "PrefBusID" , requires as argument a
        valid BusID, added in patch version 2
       
        For use in multi-user environment include the option with a valid
        BusID, for standard XFree behavior(single X server allowed) comment
        out or delete.
       
        Note This functionality is inlcuded the xorg-x11 packages for        
             Mandrake and in Debian Sid XFree86 packages, but the option name
             is changed to "IsolateDevice"                                   
       
    ��+�Use the XFree command line option -prefbusid x:x:x , requires as
        argument a valid BusID, initial release of the patch
       
        For use in multi-user environment pass the option with a valid BusID
        to XFree at start-up, for standard XFree behavior(single X server
        allowed) don't specify the option.
       
        Note This functionality is inlcuded the xorg-x11 packages for        
             Mandrake and in Debian Sid XFree86 packages, but the option name
             is changed to -isolateDevice x:x:x                              
       
   
    Note Note                                                                
    �    ��*�For Mandrake and Debian users:                                  
                                                                             
             the XFree configuration files are normally /etc/X11/XF86Config-4
                                                                             
         ��*�For Red Hat, Gentoo, SuSE users:                                
                                                                             
             the XFree configuration files are normally /etc/X11/XF86Config  
                                                                             
                                                                             
   
    ��+�using the "SingleCard" option
        Section "ServerLayout"                                               
                Identifier     "X0"                                          
                Screen      0  "Screen0" 0 0                                 
                InputDevice    "Mouse0" "CorePointer"                        
                InputDevice    "Keyboard0" "CoreKeyboard"                    
                Option         "SingleCard" "true"                           
        EndSection                                                           
        Section "ServerLayout"                                               
                Identifier     "X1"                                          
                Screen      0  "Screen1" 0 0                                 
                InputDevice    "Mouse1" "CorePointer"                        
                InputDevice    "Keyboard0" "CoreKeyboard"                    
                Option         "SingleCard" "true"                           
        EndSection                                                           
       
        Note Note                                                            
        �    The BusID have to be specified in the "Device" Section of the   
             XFree configuration file.                                       
             Section "Device"                                                
                 Identifier  "nv"                                            
                 VendorName  ""                                              
                 BoardName   ""                                              
                 Driver      "nvidia"                                        
                 # Clock lines                                               
                                                                             
                 # Uncomment following option if you see a big white block   
                 # instead of the cursor!                                    
                 #    Option      "sw_cursor"                                
                 Option      "NoLogo" "On"                                   
                 BusID       "PCI:0:13:0"                                    
             EndSection                                                      
                                                                             
       
    ��+�using the "PrefBusID/IsolateDevice" option (requires as argument a
        valid BusID)
        Section "ServerLayout"                                               
                Identifier     "X0"                                          
                Screen      0  "Screen0" 0 0                                 
                InputDevice    "Mouse0" "CorePointer"                        
                InputDevice    "Keyboard0" "CoreKeyboard"                    
                Option "PrefBusID" "1:0:0"                                   
        EndSection                                                           
        Section "ServerLayout"                                               
                Identifier     "X1"                                          
                Screen      0  "Screen1" 0 0                                 
                InputDevice    "Mouse1" "CorePointer"                        
                InputDevice    "Keyboard0" "CoreKeyboard"                    
                Option "PrefBusID" "0:13:0"                                  
        EndSection                                                           
                                                                             
       
        or for Debian Sid's XFree86 and Mandrake's xorg-x11
        Section "ServerLayout"                                               
                Identifier     "X0"                                          
                Screen      0  "Screen0" 0 0                                 
                InputDevice    "Mouse0" "CorePointer"                        
                InputDevice    "Keyboard0" "CoreKeyboard"                    
                Option "IsolateDevice" "1:0:0"                               
        EndSection                                                           
        Section "ServerLayout"                                               
                Identifier     "X1"                                          
                Screen      0  "Screen1" 0 0                                 
                InputDevice    "Mouse1" "CorePointer"                        
                InputDevice    "Keyboard0" "CoreKeyboard"                    
                Option "IsolateDevice" "0:13:0"                              
        EndSection                                                           
                                                                             
       
    ��+�using the "-prefbusid" option at XFree start-up (requires as argument
        a valid BusID)
       
        or for Debian Sid's XFree86 and Mandrake's xorg-x11 use 
        "-isolateDevice" instead
       
        Caution Caution                                                      
        �       For the older(version 1) Preferred Bus ID XFree Server only  
                this choice is valid.                                        
       
        For example on command line
        [root@svetljo mnt]# startx -- /usr/X11R6/bin/X0 :0 -prefbusid 1:0:0 vt7
        , or from a display manager (gdm):
        ..............................                                                              
        # Definition of the standard X server.                                                      
        [server-Standard]                                                                           
        name=Standard server                                                                        
        command=/usr/X11R6/bin/X0 :0 -layout first-Xserver -deferglyphs 16 -ac -prefbusid 1:0:0 vt7 
        flexible=true                                                                               
                                                                                                    
        [server-Second]                                                                             
        name=Second server                                                                          
        command=/usr/X11R6/bin/X1 :1 -layout second-Xserver -deferglyphs 16 -prefbusid 0:13:0 vt17  
        flexible=true                                                                               
        ..............................                                                              
        and for xdm/kdm
        :0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -deferglyphs 16 -prefbusid 1:0:0 vt7                         
        :1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4.TNT2 -prefbusid 0:13:0 vt17
       
   

-----------------------------------------------------------------------------
4.3. Creating symbolic links

The symbolic links are needed for properly starting several XFree instances,
as well for properly exiting an X session. This applies for both starting X
from console and the automatic starting of X by the display manager (kdm,
gdm, xdm).

You need to create as many symbolic links to the modified X server binary (or
to the original X server in case you do not need a modified one), as the
number of your video cards/X sessions.

I assume that you will have to use a modified X server, but in case you do
not need it, use the following commands to create the links to your original
X server:
cd /usr/X11R6/bin/                                                           
ln -s XFree[modified] X0                                                     
ln -s XFree[modified] X1                                                     
ln -s XFree[modified] X2                                                     
                                                                             

In case you use the provided rpm packages, you'll only need this if you want
more than 4 parallel running X servers/X sessions, as the rpm creates 4
symbolic links to the X server binary.
-----------------------------------------------------------------------------

4.4. Using independent keyboards with XFree

Once you install the Backstreet Ruby/ Ruby-2.6 kernel and start it with
dumbcon=n, you get n +1 independent consoles [1 VGA(or Framebuffer under
Ruby-2.6) + n DUMB] . If you have enough keyboards connected to your PC, each
of these consoles are associated with a given keyboard. This enables you to
start multiple X servers on each of the consoles, using the keyboard
associated with the corresponding console for input. Hence you get multiple
independent X servers with independent keyboards, which in turn make it
possible for one single PC to be used by several local X users
simultaneously.

To start X on a given console (using a given independent keyboard) you pass
it the argument vt[N], where N is a number from a given tty range.

��*�VGA(or Framebuffer for Ruby-2.6): tty1 to tty16
   
��*�DUMB1: tty17
   
��*�DUMB2: tty18
   

If you have 3 video cards, 3 keyboards, and you have started the Backstreet
Ruby kernel with dumbcon=2, you can start 3 independent X servers for 3
simultaneous users with the following commands:

Note Note                                                                    
�    ��*�For Mandrake and Debian users:                                      
                                                                             
         the XFree configuration files are normally /etc/X11/XF86Config-4    
                                                                             
     ��*�For Red Hat, Gentoo, SuSE users:                                    
                                                                             
         the XFree configuration files are normally /etc/X11/XF86Config      
                                                                             
                                                                             

Caution Caution                                                              
�       Have in mind that for the older Preferred Bus ID XFree Server        
        (version 1) you have to specify the desired graphic card with        
        parameter "-prefbusid x:x:x" where x:x:x is the Bus ID of the desired
        graphic card. Just append "-prefbusid x:x:x" with the correct Bus ID 
        of the card you want to start right before the last argument vt[x].  
        If you omit this option the modified X server will act as a not      
        modified/ standard XFree server and you wont be able to run multiple 
        XFree instances at the same time.                                    

For the 1st X server with the 1st keyboard:

$ startx -- /usr/X11R6/bin/X0 :0 -xf86config /etc/X11/XF86Config-4[for your
1st video card] vt7

For the 2nd X server with the 2nd keyboard:

$ startx -- /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4[for your
2nd video card] vt17

For the 3rd X server with the 3rd keyboard:

$ startx -- /usr/X11R6/bin/X2 :2 -xf86config /etc/X11/XF86Config-4[for your
3rd video card] vt18

For the 1st X server you can skip the -xf86config /etc/X11/XF86Config-4[for
your 1st video card] argument. In this case, the default configuration file,
/etc/X11/XF86Config-4, will be used.

Note Note                                                                    
�    ��*�VGA: tty0 to tty7                                                   
                                                                             
     ��*�DUMB1: tty8 to tty15                                                
                                                                             
     ��*�DUMB2: tty16 to tty23                                               
                                                                             
                                                                             
     This means that you have to use different vt parameter for the          
     additional X servers.                                                   
                                                                             
     For the 2nd X server with the 2nd keyboard:                             
                                                                             
     $ startx -- /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4[for  
     your 2nd video card] vt8                                                
                                                                             
     For the 3rd X server with the 3rd keyboard:                             
                                                                             
     $ startx -- /usr/X11R6/bin/X2 :2 -xf86config /etc/X11/XF86Config-4[for  
     your 3rd video card] vt16                                               

You can also setup your display manager to start the independent X servers,
once everything is properly configured. But don't rush to setup your display
manager before the configuration is finished, because this could give you
serious problems. When you are ready with the required configurations, you'll
reach the section on configuring the display manager.
-----------------------------------------------------------------------------

4.5. Using independent mice with XFree

To use an independent mouse for each of your independent X servers/sessions,
you just have to modify the input section of the XFree configuration files to
point to the proper device files.

Use /dev/input/mouse[n], where n is the number of your mouse starting from 0:

��*�1st mouse --> /dev/input/mouse0
   
��*�2nd mouse --> /dev/input/mouse1
   
��*�3rd mouse --> /dev/input/mouse2
   
��*�4th mouse --> /dev/input/mouse3
   

You shouldn't use /dev/input/mice because it merges the input from all mouse
devices.

Here is my configuration before modifications:
------------------------------------------------------------------------------------------------  
                                                                                                  
# **********************************************************************                          
# Pointer section                                                                                 
# **********************************************************************                          
                                                                                                  
Section "InputDevice"                                                                             
                                                                                                  
    Identifier  "Mouse1"                                                                          
    Driver      "mouse"                                                                           
    Option "Protocol"    "IMPS/2"                                                                 
    Option "Device"      "/dev/psaux"                                                             
    Option "ZAxisMapping" "4 5"                                                                   
                                                                                                  
# ChordMiddle is an option for some 3-button Logitech mice                                        
    Option "Emulate3Buttons"                                                                      
#    Option "ChordMiddle"                                                                         
                                                                                                  
EndSection                                                                                        
                                                                                                  
------------------------------------------------------------------------------------------------  
                                                                                                  

After modifications for the first X server:
------------------------------------------------------------------------------------------------  
                                                                                                  
# **********************************************************************                          
# Pointer section                                                                                 
# **********************************************************************                          
                                                                                                  
Section "InputDevice"                                                                             
                                                                                                  
    Identifier  "Mouse1"                                                                          
    Driver      "mouse"                                                                           
    Option "Protocol"    "IMPS/2"                                                                 
    Option "Device"      "/dev/input/mouse0"                                                      
    Option "ZAxisMapping" "4 5"                                                                   
                                                                                                  
# ChordMiddle is an option for some 3-button Logitech mice                                        
    Option "Emulate3Buttons"                                                                      
#    Option "ChordMiddle"                                                                         
                                                                                                  
EndSection                                                                                        
                                                                                                  
-----------------------------------------------------------------------------------------------   
                                                                                                  

For the second X server:
-----------------------------------------------------------------------------------------------    
# **********************************************************************                           
# Pointer section                                                                                  
# **********************************************************************                           
                                                                                                   
Section "InputDevice"                                                                              
                                                                                                   
    Identifier  "Mouse1"                                                                           
    Driver      "mouse"                                                                            
    Option "Protocol"    "IMPS/2"                                                                  
    Option "Device"      "/dev/input/mouse1"                                                       
    Option "ZAxisMapping" "4 5"                                                                    
                                                                                                   
# ChordMiddle is an option for some 3-button Logitech mice                                         
    Option "Emulate3Buttons"                                                                       
#    Option "ChordMiddle"                                                                          
                                                                                                   
EndSection                                                                                         
-----------------------------------------------------------------------------------------------    
                                                                                                   

and so on ...
-----------------------------------------------------------------------------

4.6. For graphic cards without DRI

(or reusing Xinerama configured XFree)

There could be several reasons for not using DRI:

��*�As far I know only one graphic card in a system can use DRI.
   
��*�The Nvidia closed source driver does not support DRI.
   

In case one of this reasons applies to your system, you do not need different
XFree configuration files for the different displays.

You can configure your system for Xinerama using the tools provided with your
distribution and reading [http://www.tldp.org/HOWTO/Xinerama-HOWTO/
index.html] The Xinerama-HOWTO, so when the system is used by a single user,
he/she could switch to Xinerama desktop and use all available displays for a
bigger desktop.

Once configured for Xinerama, only small additions are needed to achieve
multiple independent desktops. All you have to do is to add new layouts which
use single screen definition and have independent input devices (well, this
is actually needed only for the mouse devices, as the keyboard is managed
through the vt[n] option).

If you have configured Xinerama in the following way:
Section "ServerLayout"                                                       
    Identifier  "Simple Layout"                                              
    Screen "Screen 2"                                                        
    Screen "Screen 1" RightOf "Screen 2"                                     
    InputDevice "Mouse1" "CorePointer"                                       
    InputDevice "Keyboard1" "CoreKeyboard"                                   
EndSection                                                                   

To achieve multiple independent desktops you only have to add layout
definitions for a single screen :
Section "ServerLayout"                                                       
    Identifier  "first-Xserver"                                              
    Screen "Screen 1"                                                        
    InputDevice "Mouse1" "CorePointer"                                       
    InputDevice "Keyboard1" "CoreKeyboard"                                   
EndSection                                                                   
                                                                             
Section "ServerLayout"                                                       
    Identifier  "second-Xserver"                                             
    Screen "Screen 2"                                                        
    InputDevice "Mouse2" "CorePointer"                                       
    InputDevice "Keyboard1" "CoreKeyboard"                                   
EndSection                                                                   

Which should result in these layout definitions:
Section "ServerLayout"                                                       
    Identifier  "Xinerama"                                                   
    Screen "Screen 2"                                                        
    Screen "Screen 1" RightOf "Screen 2"                                     
    InputDevice "Mouse1" "CorePointer"                                       
    InputDevice "Keyboard1" "CoreKeyboard"                                   
EndSection                                                                   
                                                                             
Section "ServerLayout"                                                       
    Identifier  "first-Xserver"                                              
    Screen "Screen 1"                                                        
    InputDevice "Mouse1" "CorePointer"                                       
    InputDevice "Keyboard1" "CoreKeyboard"                                   
EndSection                                                                   
                                                                             
Section "ServerLayout"                                                       
    Identifier  "second-Xserver"                                             
    Screen "Screen 2"                                                        
    InputDevice "Mouse2" "CorePointer"                                       
    InputDevice "Keyboard1" "CoreKeyboard"                                   
EndSection                                                                   

Now you can start a single X server with option -layout Xinerama and enjoy
the Xinerama desktop, or

You can start 2 independent X servers using -layout first-Xserver for the
first, and -layout second-Xserver for the second.

Since you will use a single XFree configuration file for all X servers,

��*�in order to use independent keyboards you have to use following command:
   
    For 1st X server with the 1st keyboard:
   
    $ startx -- /usr/X11R6/bin/X0 :0 -layout first-Xserver vt7
   
    For 2nd X server with the 2nd keyboard:
   
    $ startx -- /usr/X11R6/bin/X1 :1 -layout second-Xserver vt17
   
    and if you want to use Xinerama:
   
    $ startx -- /usr/X11R6/bin/X -layout Xinerama vt7
   
��*�
    Note Note                                                                
    �    For older versions of Backstreet Ruby you have to use:              
                                                                             
         For 1st X server with the 1st keyboard:                             
                                                                             
         $ startx -- /usr/X11R6/bin/X0 :0 -layout first-Xserver vt7          
                                                                             
         For 2nd X server with the 2nd keyboard:                             
                                                                             
         $ startx -- /usr/X11R6/bin/X1 :1 -layout second-Xserver vt8         
   
��*�also the mice must have different identifiers:
    ------------------------------------------------------------------------------------------------ 
                                                                                                     
    # **********************************************************************                         
    # Pointer section                                                                                
    # **********************************************************************                         
                                                                                                     
    Section "InputDevice"                                                                            
                                                                                                     
        Identifier  "Mouse1"                                                                         
        Driver      "mouse"                                                                          
        Option "Protocol"    "IMPS/2"                                                                
        Option "Device"      "/dev/input/mouse0"                                                     
        Option "ZAxisMapping" "4 5"                                                                  
                                                                                                     
    # ChordMiddle is an option for some 3-button Logitech mice                                       
        Option "Emulate3Buttons"                                                                     
    #    Option "ChordMiddle"                                                                        
                                                                                                     
    EndSection                                                                                       
                                                                                                     
    Section "InputDevice"                                                                            
                                                                                                     
        Identifier  "Mouse2"                                                                         
        Driver      "mouse"                                                                          
        Option "Protocol"    "IMPS/2"                                                                
        Option "Device"      "/dev/input/mouse1"                                                     
        Option "ZAxisMapping" "4 5"                                                                  
                                                                                                     
    # ChordMiddle is an option for some 3-button Logitech mice                                       
        Option "Emulate3Buttons"                                                                     
    #    Option "ChordMiddle"                                                                        
                                                                                                     
    EndSection                                                                                       
    -----------------------------------------------------------------------------------------------  
   

-----------------------------------------------------------------------------
4.7. Nvidia GLX & DRI

Note Note                                                                    
�    Here you will learn how to configure your system for parallel use of    
     Nvidia's GLX and XFree's DRI. If you do not have Nvidia cards, or you   
     have only Nvidia cards, you do not need to read this section. In the    
     first case you do not need the Nvidia GLX at all, and in the second, you
     can use the standard procedure for installing GLX.                      

Why Nvidia? Why closed source drivers?

A bit of a mixed up answer:

 1. With the open source driver it's almost impossible to bring up a
    secondary card, so we should use the closed source driver.
   
 2. Why the Nvidia card? Currently these are the only available, affordable
    PCI video cards with some acceleration.
   
 3.  I tried to use DRI on 2 parallel X servers, but it didn't work. I posted
    emails to XFree, DRI and lkml list, but I only got a single answer with
    no valuable information on my problem. I tried to run DRI on a Matrox
    G550 DH AGP & SiS63xx PCI, but when enabled for both cards, I got AGP
    errors. When enabled only for one of the cards, I got DRI up and running.
    Please, someone confirm or prove me wrong!
   

I'll explain several ways to get configuration working for both Nvidia GLX
and XFree86 DRI. There are probably a lot of other possibilities, and maybe
these are not the simplest, but they are the ones I know to work.

The reasons why this is needed:

 1. Nvidia should use a different module path for xf86: the glx extension
    module from Nvidia is incompatible with the one from XFree86.
   
 2. Nvidia should use a different XF86Config file: because DRI should be
    disabled for Nvidia and enabled for others.
   

If you find a simpler way, please email it me and I'll include it.

Caution Caution                                                              
�       This can not be used as-is on SuSE Linux. In order to make it easy   
        for the user to switch between Mesa, XFree and Nvidia GL libraries,  
        SuSE uses a very complicated setup for the GL libraries. To use this 
        setup you have to switch your configuration to XFree86's GL          
        libraries.                                                           
-----------------------------------------------------------------------------

4.7.1. Example 1

This is the configuration that I use on my system (ATI AIW Radeon 7500 AGP
and Nvidia TNT2 M64 PCI) XFree configuration files:

 1. Create a directory /usr/X11R6/libNV:
   
    mkdir /usr/X11R6/libNV
   
 2. Create links to the original /usr/X11R6/lib:
   
    cd /usr/X11R6/libNV
   
    lndir -silent -ignorelinks ../lib
   
 3. Install the Nvidia driver and libraries in /usr/X11R6/libNV.
   
 4. Install Nvidia's libGLcore.so.1.0 [driver version], or better,
    libGLcore.so.1, in /usr/lib. Make a symbolic link from /usr/X11R6/libNV/
    libGLcore.so.1 to /usr/lib/libGLcore.so.1 (this will allow you to easily
    update your Nvidia drivers):
   
    cd /usr/lib
   
    ln -s ../X11R6/libNV/libGLcore.so.1 ./
   
    Note: the Nvidia libGL.so is installed /usr/X11R6/libNV, so it's
    invisible to the system unless you tell the system about the existence of
    /usr/X11R6/libNV. For this setup, you must not do this, as it will break
    the standard X server start-up. But you can use the XFree GL libraries
    with the Nvidia graphic card and Nvidia closed source drivers, with a
    non-Nvidia graphic card, using XFree's DRI, which the GL library from
    Nvidia cannot do.
   
 5. Add a line in the XFree configuration file for the Nvidia card to point
    the X server to the right location of the library and module path:
    Section "Files"                                                          
                                                                             
    ..........                                                               
    ModulePath  "/usr/X11R6/libNV/modules"                                   
    ..........                                                               
                                                                             
    EndSection                                                               
                                                                             
   
 6. Install the Nvidia kernel driver.
   

Now everything should be fine and you should be able to use DRI and Nvidia
GLX at the same time. You will have a bit smaller performance in comparison
to a setup which uses Nvidia's libGL & libGLcore, but the difference is not
that big on my PC.
-----------------------------------------------------------------------------

4.7.2. Example 2

This example will give you the full performance of both the Nvidia card(s),
and the non-Nvidia card, since XFree's libGL is used for the non Nvidia card,
and Nvidia's libGL is used for Nvidia cards. But this will require one more X
server to be precise; a simple wrapper to add the path to the Nvidia
libraries, and symbolic links to it for additional Nvidia cards.

It is almost the same as the previous scenario, with the difference that the
X servers for the Nvidia cards should start with an environment where
Nvidia's libGL is known, while the X servers for non Nvidia cards shouldn't
know anything about the Nvidia libGL. This requires a wrapper to be used for
starting the X servers driving Nvidia cards.

Install the Nvidia libraries and kernel driver like in the previous example.
You may skip step 4. as libGLcore.so.1 is installed in /usr/X11R6/libNV, and
we'll inform the X servers driving Nvidia cards about the proper path to the
Nvidia libraries.

The missing part - the wrapper :
#!/bin/bash                                                                  
export LD_LIBRARY_PATH=/usr/X11R6/libNV                                      
exec /usr/X11R6/bin/X0 $*                                                    
                                                                             

Copy these lines into your favourite editor and save the file as XNV. Make it
executable:

chmod +x XNV

Copy the file to /usr/X11R6/bin and make symbolic links to it for additional
Nvidia cards (for additional cards just add more links):
cp XNV /usr/X11R6/bin                                                        
cd /usr/X11R6/bin                                                            
ln -s XNV Xnv0                                                               
ln -s XNV Xnv1                                                               
ln -s XNV Xnv2                                                               
                                                                             

Remember to use /usr/X11R6/bin/Xnv0, /usr/X11R6/bin/Xnv1 ..., instead of /usr
/X11R6/bin/X0, /usr/X11R6/bin/X1 ... for your Nvidia cards while configuring
the display managers in the next chapter, or when starting X on Nvidia card
(s) from console.
-----------------------------------------------------------------------------

4.7.3. Installing the Nvidia libraries easily

Using the new Nvidia installer (note, this is a work in progress, do not use
if you don't understand what happens here. To-do: write a script to perform
steps 1-4. Please provide some feedback on the script in Appendix->Scripts):

Manually:

 1. Make a backup of your XFree GL libraries:
    cd  [XFree prefix]                                                       
                                                                             
   
    On my Mandrake system I can use:
    cd $OPENWINHOME                                                                                         
    find lib -name "libGL.*" -o -name "libGLcore*" -o -name "libglx.*" | xargs tar  rpfv   libGL-backup.tar 
                                                                                                            
   
 2. Then run the Nvidia installer:
    ./NVIDIA-Linux-x86-1.0-4349.run --no-opengl-headers --xfree86-prefix=/usr/X11R6NV --opengl-prefix=/usr/X11R6NV  
                                                                                                                    
   
 3. Copy the installed files to /usr/X11R6/libNV:
    cd /usr/X11R6NV/lib &&  tar cv * | tar xvC /usr/X11R6/libNV/             
                                                                             
   
 4. Restore the backed-up GL libraries:
    cd [XFree prefix]                                                        
    tar xvfp libGL-backup.tar && ldconfig                                    
                                                                             
   

-----------------------------------------------------------------------------
Chapter 5. More on configuring input devices

Here you will find more details on configuring input devices and dealing with
secondary keyboard interfaces found in USB multimedia keyboards.

If you feel comfortable under Linux, please review and test the experimental
service ruby_init. The service, the configuration file and the README can be
found in Appendix D. Any kind of feedback is highly appreciated. (Please,
please drop a line with comments. :-) )

Note Note                                                                    
�    If you are configuring a system with two displays( 2 keyboards, 2 mice) 
     you probably can skip to Chapter 6 "Configuring display managers", but  
     if you want to use a single system for more users you will find really  
     useful information in this chapter.                                     
-----------------------------------------------------------------------------

5.1. Finding the real devices

We will need this information later on, to be able to assign a given keyboard
/mouse to a given X-server/Display.

To find the PHYS ID's (the addresses) or the name(quite oft it differs from
the one labeled on the device) of your input devices you have to read the
file /proc/bus/input/devices.

Here is what I have:
[svetljo@svetljo How-To]# cat /proc/bus/input/devices                        
I: Bus=0011 Vendor=0002 Product=0002 Version=0034                            
N: Name="PS2++ Logitech Wheel Mouse"                                         
P: Phys=isa0060/serio1/input0                                                
H: Handlers=mouse0 ts0                                                       
B: EV=7                                                                      
B: KEY=f0000 0 0 0 0 0 0 0 0                                                 
B: REL=103                                                                   
                                                                             
I: Bus=0011 Vendor=0001 Product=0002 Version=ab02                            
N: Name="AT Set 2 keyboard"                                                  
P: Phys=isa0060/serio0/input0                                                
H: Handlers=kbd                                                              
B: EV=120003                                                                 
B: KEY=4 2000000 8061f9 fbc9d621 efdfffdf ffefffff ffffffff fffffffe         
B: LED=7                                                                     
                                                                             
I: Bus=0003 Vendor=046d Product=c303 Version=0700                            
N: Name="Logitech    USB Keyboard"                                           
P: Phys=usb-00:10.1-1.1/input0                                               
H: Handlers=kbd                                                              
B: EV=120003                                                                 
B: KEY=10000 7f ffe00000 7ff ffbeffdf ffffffff ffffffff fffffffe             
B: LED=7                                                                     
                                                                             
I: Bus=0003 Vendor=046d Product=c303 Version=0700                            
N: Name="Logitech    USB Keyboard"                                           
P: Phys=usb-00:10.1-1.1/input1                                               
H: Handlers=kbd                                                              
B: EV=100003                                                                 
B: KEY=1078 1800d100 1e0000 0 0 0                                            
                                                                             
I: Bus=0003 Vendor=05fe Product=0011 Version=0000                            
N: Name="Cypress Sem. PS2/USB Browser Combo Mouse"                           
P: Phys=usb-00:10.1-1.2/input0                                               
H: Handlers=mouse1 ts1                                                       
B: EV=7                                                                      
B: KEY=1f0000 0 0 0 0 0 0 0 0                                                
B: REL=103                                                                   

Note Note                                                                    
�    ��*�/proc/bus/input/devices will provide the needed information for all 
         devices except USB multimedia/office keyboards.                     
                                                                             
     ��*�For such USB multimedia/office keyboards you will have to gather    
         additional information, for example with the help of lsusb.         
                                                                             
     ��*�Under Ruby-2.6 for usb devices it will look like "usb-0000:00:10.x" 
         not "usb-00:10.x"                                                   
                                                                             
                                                                             

��*�First we have to find the address of the USB keyboard:
    [root@svetljo How-To]# lsusb                                             
    Bus 004 Device 001: ID 0000:0000                                         
    Bus 003 Device 001: ID 0000:0000                                         
    Bus 003 Device 002: ID 0409:55ab NEC Corp. Hub [iMac kbd]                
    Bus 003 Device 003: ID 046d:c303 Logitech, Inc.                          
    Bus 003 Device 004: ID 05fe:0011 Chic Technology Corp. Browser Mouse     
    Bus 002 Device 001: ID 0000:0000                                         
    Bus 001 Device 001: ID 0000:0000                                         
   
    Here, my USB Logitech keyboard is Device 003 on Bus 003.
   
��*�Now we run lsusb with arguments -v -s [your USB keyboard device id in
    form Bus:Device], in my case, lsusb -v -s 003:003.
    ........                                                                 
        Interface Descriptor:                                                
          bLength                 9                                          
          bDescriptorType         4                                          
          bInterfaceNumber        0                                          
          bAlternateSetting       0                                          
          bNumEndpoints           1                                          
          bInterfaceClass         3 Human Interface Devices                  
          bInterfaceSubClass      1 Boot Interface Subclass                  
          bInterfaceProtocol      1 Keyboard                                 
          iInterface              0                                          
    ........                                                                 
                                                                             
        Interface Descriptor:                                                
          bLength                 9                                          
          bDescriptorType         4                                          
          bInterfaceNumber        1                                          
          bAlternateSetting       0                                          
          bNumEndpoints           1                                          
          bInterfaceClass         3 Human Interface Devices                  
          bInterfaceSubClass      0 No Subclass                              
          bInterfaceProtocol      0 None                                     
          iInterface              0                                          
    ........                                                                 
   

So my USB keyboard has two interfaces (see bInterfaceNumber); the first one
is the real keyboard (bInterfaceProtocol 1 Keyboard), the second
(bInterfaceProtocol 0 None) - the additional keys. Hence the real USB
keyboard is:
.....                                                                        
N: Name="Logitech    USB Keyboard"                                           
P: Phys=usb-00:10.1-1.1/input0                                               
H: Handlers=kbd                                                              
.....                                                                        

The "P: Phys=" field (the physical descriptor/address) consorts of:

 1. Bus type: "usb"
   
 2. PCI function of the USB controller: "00:10.1 " ( for Ruby-2.6 "0000:00:
    10.1")
   
 3. USB device id: "1.1"
   
 4. The string: "/input"
   
 5. Interface number: "0"
   

-----------------------------------------------------------------------------
5.2. Using hotplug with input.agent and input.rc

Using the input.agent will allow you to manage input devices based on their
PHYS ID.

The input.rc script will run the input.agent with appropriate arguments for
drivers that are built in the kernel or are loaded before hotplug is
available.
-----------------------------------------------------------------------------

5.2.1. input.agent

The input agent uses 3 configuration files:

��*�/etc/hotplug/kbd.conf
   
��*�/etc/hotplug/mouse.conf
   
��*�/etc/hotplug/event.conf
   

Note Note                                                                    
�    The explanations here are using Backstreet Ruby ( usb devices have      
     PHYS_ID "usb-00:xx.x-..."), if you are running Ruby-2.6 for usb devices 
     you should have PHYS_ID "usb-0000:00:xx.x-...." , but you should be able
     to use the same configuration files both under Backstreet Ruby and      
     Ruby-2.6 by specifying "usb-0*:xx.x-..." .                              

To configure the keyboards you have to adjust /etc/hotplug/kbd.conf

If I wanted to use the PS2 keyboard for the primary Display and for the VGA
console, I would have:
#                                                                            
# keyboard configuration                                                     
#                                                                            
# vt_name device_physicaly_location                                          
                                                                             
VT0     isa0060/serio0/input0                                                
VT1     usb-00:10.1-1.1/input0                                               
                                                                             

Or, if I want to use the USB keyboard for the primary Display and for the VGA
console:
#                                                                            
# keyboard configuration                                                     
#                                                                            
# vt_name device_physicaly_location                                          
                                                                             
VT0     usb-00:10.1-1.1/input0                                               
VT1     isa0060/serio0/input0                                                
                                                                             

you could also use "*.*" instead of the pci function of the USB controller:
#                                                                            
# keyboard configuration                                                     
#                                                                            
# vt_name device_physicaly_location                                          
                                                                             
VT0     usb-*.*-1.1/input0                                                   
VT1     isa0060/serio0/input0                                                
                                                                             

For mouse devices you have to edit /etc/hotplug/mouse.conf
#                                                                            
# mouse device configuration                                                 
#                                                                            
# sym_link device_physicaly_location                                         
mouse0br        usb-00:10.1-1.2/input0                                       
mouse1br        usb-*.*-2.7.*/input0                                         
mouse2br        isa0060/serio1/*                                             
                                                                             

and adjust the XFree configuration file.

For the first mouse change
......                                                                       
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse0"                                 
    Option "ZAxisMapping" "4 5"                                              
......                                                                       
                                                                             

to :
......                                                                       
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse0br"                               
    Option "ZAxisMapping" "4 5"                                              
......                                                                       
                                                                             

For the second mouse change
......                                                                       
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse1"                                 
    Option "ZAxisMapping" "4 5"                                              
......                                                                       
                                                                             

to :
......                                                                       
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse1br"                               
    Option "ZAxisMapping" "4 5"                                              
......                                                                       
                                                                             

and so on.

For Event devices edit /etc/hotplug/event.conf
#                                                                            
# input event device config file                                             
#                                                                            
# symbolic_link device_physicaly_location                                    
event0br        isa0060/serio0/*                                             
event1br        isa0060/serio1/input0                                        
event2br        usb-*.*-3/input0                                             
                                                                             

and configure the applications which use them to use the symbolic links
instead of the real devices
-----------------------------------------------------------------------------

5.2.2. input.rc

If you are using input drivers built into the kernel please ensure that the
input.rc script is started/executed at system start. In case the script is
not executed you will find that hotplug could not configure these input
devices.

Note Note                                                                    
�    This area requires user feedback. Currently I have information only     
     about Mandrake, where hotplug is not run as service.                    

If your distribution runs hotplug as service this will be done automatically.

If your distribution does not run hotplug as service you will have to modify
your init scripts to run input.rc for you before XFree is started.

You may add this at the end of your /etc/rc.d/rc.sysinit
if [[ -f /proc/bus/console -o -n tmp=`uname -r | sed -n 's:ruby::p'` ]]; then                                         
   if [ -x /etc/hotplug/input.rc ]; then                                                                              
      /etc/hotplug/input.rc start                                                                                     
      if [ $? = 0 ]; then                                                                                             
        action "Configuring cold plugged input devices" /bin/true                                                     
      else                                                                                                            
        action "Configuring cold plugged input devices" /bin/false                                                    
      fi                                                                                                              
   else if [ -f /etc/hotplug/input.rc ]; then                                                                         
           action "Input: input.rc installed, but not executable. Please check the file permissions." /bin/false      
        else                                                                                                          
           action "Input: Failed to configure cold plugged devices - input.rc missing"  /bin/false                    
        fi                                                                                                            
   fi                                                                                                                 
fi                                                                                                                    
-----------------------------------------------------------------------------

5.3. Using XFree with event interface support

This will allow you:

��*�if you have input devices with different names, to use them with the same
    Xserver/screen wherever you plug or re-plug them.
   
��*�if you have input devices with the same names, to use them with the same
    Xserver/screen according to the USB port where you plug or re-plug them.
   
��*�the ability to use wild cards such as "*" and "?".
   

Caution Caution                                                              
�       Currently hot-plugging doesn't seems to work properly. I have reports
        that it works when using the "Dev Name" option, but my primary       
        purpose was to get it working with "Dev Phys" and this does not      
        currently seem to work. "Why "Dev Phys"?" - because if one wants to  
        setup a single system for 4,5 or more users it would be easier to get
        4,5 or more pieces of the same keyboard/ mouse then to find the same 
        number keyboards or mice but from different manufacturer or with     
        different names, and i find configuring XFree for such number users  
        is simpler when "Dev Phys" is used.                                  

Warning Warning                                                              
�       This section is somewhat abandoned and is not tested under Ruby-2.6  
        as it didn't work reliably for me.                                   

For this to work you will have to use XFree with the patches for event
interface support, developed by Zephaniah Hull. You can find them at the
following url: [http://people.debian.org/~warp/evdev/] http://
people.debian.org/~warp/evdev/.

To build from source you will need the following patches :

��*�029_lnx_evdev.diff : The evdev core patch.
   
��*�030_lnx_evdev_mouse.diff : The mouse side of the patch.
   
��*�031_lnx_evdev_keyboard.diff : The keyboard side of the patch.
   

The binaries for Debian include these patches.

For hot-plugging you will also need the /etc/hotplug/input.agent , which you
can find under the above address and in Appendix Scripts

Then you have to configure XFree to use the event devices.

The configuration section for a mouse should look something like this:
Section "InputDevice"                                                        
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Name"      "A4Tech USB Optical Mouse"                   
    Option      "Dev Phys"      "usb-*/input0"                               
    Option      "Buttons"       "9"                                          
                                                                             
    Option      "ZAxisMapping"  "6 7 8 9"                                    
EndSection                                                                   

The configuration section for a keyboard should look something like this:
Section "InputDevice"                                                        
    Identifier  "Keyboard1"                                                  
    Driver      "kbd"                                                        
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Name"      "SILITEK USB Keyboard"                       
    Option      "Dev Phys"      "usb-*/input0"                               
    Option      "AutoRepeat"    "250 30"                                     
    Option      "XkbRules"      "xfree86"                                    
    Option      "XkbModel"      "pc101"                                      
    Option      "XkbLayout"     "dvorak"                                     
EndSection                                                                   

For Dev Name and Dev Phys, the wildcats "?" and "*" work, you MUST have at
least one of the two, if you have both then the device must match on both, a
non-existent entry is the same as one consisting of "*".
-----------------------------------------------------------------------------

5.4. Using the "Phys" descriptor and USB devices

Using the "Phys" descriptor of input devices simplifies a lot the
configuration of input devices in XFree, especially when a bigger number of
displays are used.

As USB devices are connecting in a tree form, you can really easy specify the
way keyboard and mice devices are bound to a specified X display. You have to
use one USB hub with number of ports equal(or bigger) to the number of the X
displays, to this hub are connected smaller (2-4 port) hubs (or keyboards
with integrated hub). To the first port of the smaller (integrated) hub are
connected the keyboards, to the second the mice (in case there are free ports
you can connect usb-audio devices to them :) ). This results in the following
layout of the usb-id's in case the primary USB hub is the first USB device :

Note Note                                                                    
�    In the following explanations and examples I use for first device on the
     secondary(integrated) hub keyboard device because my keyboard is        
     internally connected to the 1st port of the integrated hub. I assume    
     this will apply for most of the keyboards with integrated hub, but in   
     case the one you own uses different port you will have to make small    
     adjustments.                                                            

��*�on the 1st port of the primary hub
   
    ��+�1.1 USB hub (integrated)
       
    ��+�1.1.1 USB keyboard
       
    ��+�1.1.2 USB mouse
       
    ��+�(1.1.3 usb-audio/other usb device)
       
   
��*�on the 2nd port
   
    ��+�1.2 USB hub (integrated)
       
    ��+�1.2.1 USB keyboard
       
    ��+�1.2.2 USB mouse
       
    ��+�(1.2.3 usb-audio/other usb device)
       
   
��*�on the 3rd port
   
    ��+�1.3 USB hub (integrated)
       
    ��+�1.3.1 USB keyboard
       
    ��+�1.3.2 USB mouse
       
    ��+�(1.3.3 usb-audio/other usb device)
       
   
��*�on the 4th port
   
    ��+�1.4 USB hub (integrated)
       
    ��+�1.4.1 USB keyboard
       
    ��+�1.4.2 USB mouse
       
    ��+�(1.4.3 usb-audio/other usb device)
       
   

Based on this we can bind all devices connected to a specified USB port to a
given X server.
-----------------------------------------------------------------------------

5.4.1. ... with Input Agent

An example for a 4-user system using the "Phys" descriptor with Input Agent
and USB input devices.

Note Note                                                                    
�    Here the PCI function of the USB controller is masked by *.* so it      
     should work both under Backstreet Ruby and Ruby-2.6 . If you use more   
     then one USB controller you'll have to use different mask ( for example 
     "usb-0*:xx.x-...") or specify the full PHYS_ID's : .                    
                                                                             
     For Backstreet Ruby you should have PHYS_ID "usb-00:xx.x-..."           
                                                                             
     For Ruby-2.6 you should have PHYS_ID "usb-0000:00:xx.x-...."            

We'll use the "vt[n]" parameter when starting X and the following
configuration file for the keyboards(/etc/hotplug/kbd.conf ):
#                                                                            
# keyboard configuration                                                     
#                                                                            
# vt_name device_physicaly_location                                          
                                                                             
VT0     usb-*.*-1.1.1/input0                                                 
VT1     usb-*.*-1.2.1/input0                                                 
VT2     usb-*.*-1.3.1/input0                                                 
VT3     usb-*.*-1.4.1/input0                                                 
                                                                             

For mouse devices the configuration file (/etc/hotplug/mouse.conf) will look
like this:
#                                                                            
# mouse device configuration                                                 
#                                                                            
# sym_link device_physicaly_location                                         
mouse0br        usb-*.*-1.1.2/input0                                         
mouse1br        usb-*.*-1.2.2/input0                                         
mouse2br        usb-*.*-1.3.2/input0                                         
mouse3br        usb-*.*-1.4.2/input0                                         
                                                                             

and we have to adjust the XFree configuration files, so XFree uses the
symbolic links instead of the actual devices. If you already configured
independent mice you have only to append "br" to each of the mouse devices.

Change each "/dev/input/mouse[n]" to "/dev/input/mouse[n]br".

For the first display:
......                                                                       
# **********************************************************************     
# Pointer section                                                            
# **********************************************************************     
                                                                             
Section "InputDevice"                                                        
                                                                             
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse0br"                               
    Option "ZAxisMapping" "4 5"                                              
                                                                             
# ChordMiddle is an option for some 3-button Logitech mice                   
    Option "Emulate3Buttons"                                                 
#    Option "ChordMiddle"                                                    
                                                                             
EndSection                                                                   
......                                                                       
                                                                             

For the second display:
......                                                                       
# **********************************************************************     
# Pointer section                                                            
# **********************************************************************     
                                                                             
Section "InputDevice"                                                        
                                                                             
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse1br"                               
    Option "ZAxisMapping" "4 5"                                              
                                                                             
# ChordMiddle is an option for some 3-button Logitech mice                   
    Option "Emulate3Buttons"                                                 
#    Option "ChordMiddle"                                                    
                                                                             
EndSection                                                                   
......                                                                       
                                                                             

and so on.

Or in case a single XFree configuration file is used:
......                                                                       
# **********************************************************************     
# Pointer section                                                            
# **********************************************************************     
                                                                             
Section "InputDevice"                                                        
                                                                             
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse0br"                               
    Option "ZAxisMapping" "4 5"                                              
                                                                             
# ChordMiddle is an option for some 3-button Logitech mice                   
    Option "Emulate3Buttons"                                                 
#    Option "ChordMiddle"                                                    
                                                                             
EndSection                                                                   
Section "InputDevice"                                                        
                                                                             
    Identifier  "Mouse2"                                                     
    Driver      "mouse"                                                      
    Option "Protocol"    "IMPS/2"                                            
    Option "Device"      "/dev/input/mouse1br"                               
    Option "ZAxisMapping" "4 5"                                              
                                                                             
# ChordMiddle is an option for some 3-button Logitech mice                   
    Option "Emulate3Buttons"                                                 
#    Option "ChordMiddle"                                                    
                                                                             
EndSection                                                                   
......                                                                       
                                                                             
-----------------------------------------------------------------------------

5.4.2. ... with XFree with event interface support

Using the "Dev Phys" option of XFree with event device support and USB input
devices enables us to use almost identical configuration of the input devices
for all X servers. The only difference will be in the part of the usb-id,
which reflects the port of the primary USB hub.

Note Note                                                                    
�    The examples below are for multiple XFree configuration files, if you   
     use a single XFree configuration file you have to adjust the            
     identifiers.                                                            

The configuration for the input devices for the 1st display would look
something like this:
Section "InputDevice"                                                        
    Identifier  "Keyboard1"                                                  
    Driver      "kbd"                                                        
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-1.1.1/input0"                         
    Option      "AutoRepeat"    "250 30"                                     
    Option      "XkbRules"      "xfree86"                                    
    Option      "XkbModel"      "pc101"                                      
    Option      "XkbLayout"     "dvorak"                                     
EndSection                                                                   
Section "InputDevice"                                                        
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-1.1.2/input0"                         
    Option      "ZAxisMapping"  "4 5"                                        
EndSection                                                                   

For the 2nd display something like this:
Section "InputDevice"                                                        
    Identifier  "Keyboard1"                                                  
    Driver      "kbd"                                                        
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-1.2.1/input0"                         
    Option      "AutoRepeat"    "250 30"                                     
    Option      "XkbRules"      "xfree86"                                    
    Option      "XkbModel"      "pc101"                                      
    Option      "XkbLayout"     "dvorak"                                     
EndSection                                                                   
Section "InputDevice"                                                        
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-1.2.2/input0"                         
    Option      "ZAxisMapping"  "4 5"                                        
EndSection                                                                   

For the 3rd display something like this:
Section "InputDevice"                                                        
    Identifier  "Keyboard1"                                                  
    Driver      "kbd"                                                        
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-1.3.1/input0"                         
    Option      "AutoRepeat"    "250 30"                                     
    Option      "XkbRules"      "xfree86"                                    
    Option      "XkbModel"      "pc101"                                      
    Option      "XkbLayout"     "dvorak"                                     
EndSection                                                                   
Section "InputDevice"                                                        
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-1.3.2/input0"                         
    Option      "ZAxisMapping"  "4 5"                                        
EndSection                                                                   

and so on.

You could also use the "?", so wherever you plug the primary hub, all
displays will still have the desired configuration.
Section "InputDevice"                                                        
    Identifier  "Keyboard1"                                                  
    Driver      "kbd"                                                        
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-?.1.1/input0"                         
    Option      "AutoRepeat"    "250 30"                                     
    Option      "XkbRules"      "xfree86"                                    
    Option      "XkbModel"      "pc101"                                      
    Option      "XkbLayout"     "dvorak"                                     
EndSection                                                                   
Section "InputDevice"                                                        
    Identifier  "Mouse1"                                                     
    Driver      "mouse"                                                      
    Option      "Protocol"      "evdev"                                      
    Option      "Dev Phys"      "usb-*-?.1.2/input0"                         
    Option      "ZAxisMapping"  "4 5"                                        
EndSection                                                                   
-----------------------------------------------------------------------------

Chapter 6. Configuring display managers

If you have successfully finished the installation and configuration of the
kernel and XFree, it's time to configure your display manager(s).

Beside the graphical differences, xdm/kdm and gdm handle the X servers
differently. Gdm will start the X servers in the order specified in it's
configuration file (and stop them in the reverse order). Xdm/kdm will start
and stop all the X servers at the same time(in case there are no opened X
sessions). Also, restarting the gdm daemon means end for all X sessions, but
if you restart xdm/kdm when you are under X, your session won't be closed.

��*�Using gdm could help you to retain the VGA console and prevents lock-ups
    with some graphic cards (check the compatibility list).
   
��*�Using xdm/kdm allows you to switch it's configuration retaining your
    opened X session(of course the changes shouldn't affect the X server you
    are using).
   

Note Note                                                                    
�    Have in mind that for the older Preferred Bus ID XFree Server (version  
     1) you have to specify the desired graphic card with parameter "        
     -prefbusid x:x:x" where x:x:x is the Bus ID of the desired graphic card.
     Just append "-prefbusid x:x:x" with the correct Bus ID of the card you  
     want to start right before the last argument vt[x].                     
-----------------------------------------------------------------------------

6.1. Configuring xdm and kdm

If everything is working now, it's time to setup the automatic starting of X
on all displays. For xdm and kdm you have to modify one single file. For a
Red Hat-like system this would be /etc/X11/xdm/Xservers; for other
distributions check whether this file exists. If not, find your XFree86
configuration directory, and in it you'll find xdm/Xservers.

Note Note                                                                    
�    ��*�SuSE uses:                                                          
                                                                             
         ��+�/etc/X11/XF86Config                                             
                                                                             
         ��+�/etc/X11/xdm/Xservers for xdm                                   
                                                                             
         ��+�/etc/opt/kde3/share/config/kdm/Xservers for kdm                 
                                                                             
                                                                             
         you can make a backup copy of /etc/opt/.../kdm/Xservers and make a  
         symbolic link from /etc/X11/xdm/Xservers to /etc/opt/../kdm/        
         Xservers, in order to use the same configuration file for xdm and   
         kdm.                                                                
                                                                             
     ��*�Debian uses:                                                        
                                                                             
         ��+�/etc/kde3/kdm/Xservers for kdm                                  
                                                                             
                                                                             
         you can make a backup copy of /etc/kde3/kdm/Xservers and make a     
         symbolic link from /etc/X11/xdm/Xservers to /etc/kde3/kdm/Xservers, 
         in order to use the same configuration file for xdm and kdm.        
                                                                             
     ��*�Red Hat and Gentoo use:                                             
                                                                             
         ��+�/etc/X11/XF86Config                                             
                                                                             
                                                                             
                                                                             

For every additional X server you should add a single line. You can copy the
existing line, change the X server binary and display number, and append
-xf86config [your configuration file]. My original xdm/Xservers:
#####################################################################                            
                                                                                                 
# $XConsortium: Xserv.ws.cpp,v 1.3 93/09/28 14:30:30 gildea Exp $                                
#                                                                                                
#                                                                                                
# $XFree86: xc/programs/xdm/config/Xserv.ws.cpp,v 1.1.1.1.12.2 1998/10/04 15:23:14 hohndel Exp $ 
#                                                                                                
# Xservers file, workstation prototype                                                           
#                                                                                                
# This file should contain an entry to start the server on the                                   
# local display; if you have more than one display (not screen),                                 
# you can add entries to the list (one per line).  If you also                                   
# have some X terminals connected which do not support XDMCP,                                    
# you can add them here as well.  Each X terminal line should                                    
# look like:                                                                                     
#       XTerminalName:0 foreign                                                                  
#                                                                                                
:0 local /bin/nice -n -10 /usr/X11R6/bin/X :0 -deferglyphs 16 vt7                                
                                                                                                 
######################################################################                           
                                                                                                 

and the modified version:
######################################################################                           
                                                                                                 
# $XConsortium: Xserv.ws.cpp,v 1.3 93/09/28 14:30:30 gildea Exp $                                
#                                                                                                
#                                                                                                
# $XFree86: xc/programs/xdm/config/Xserv.ws.cpp,v 1.1.1.1.12.2 1998/10/04 15:23:14 hohndel Exp $ 
#                                                                                                
# Xservers file, workstation prototype                                                           
#                                                                                                
# This file should contain an entry to start the server on the                                   
# local display; if you have more than one display (not screen),                                 
# you can add entries to the list (one per line).  If you also                                   
# have some X terminals connected which do not support XDMCP,                                    
# you can add them here as well.  Each X terminal line should                                    
# look like:                                                                                     
#       XTerminalName:0 foreign                                                                  
#                                                                                                
                                                                                                 
:0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -deferglyphs 16 vt7                               
:1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4.TNT2 vt17       
                                                                                                 
#######################################################################                          
                                                                                                 

If you have more video cards just add more lines:
:2 local /bin/nice -n -10 /usr/X11R6/bin/X2 :2 -xf86config /etc/X11/XF86Config-4.[your 3rd card] vt18  
:3 local .....                                                                                         
                                                                                                       

If you use a single XFree configuration file :
######################################################################                           
                                                                                                 
# $XConsortium: Xserv.ws.cpp,v 1.3 93/09/28 14:30:30 gildea Exp $                                
#                                                                                                
#                                                                                                
# $XFree86: xc/programs/xdm/config/Xserv.ws.cpp,v 1.1.1.1.12.2 1998/10/04 15:23:14 hohndel Exp $ 
#                                                                                                
# Xservers file, workstation prototype                                                           
#                                                                                                
# This file should contain an entry to start the server on the                                   
# local display; if you have more than one display (not screen),                                 
# you can add entries to the list (one per line).  If you also                                   
# have some X terminals connected which do not support XDMCP,                                    
# you can add them here as well.  Each X terminal line should                                    
# look like:                                                                                     
#       XTerminalName:0 foreign                                                                  
#                                                                                                
                                                                                                 
:0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -layout first-Xserver -deferglyphs 16 vt7         
:1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -layout second-Xserver vt17                       
                                                                                                 
#######################################################################                          

Note Note                                                                                                   
�    Under older versions of Backstreet Ruby (released before 7. Oct 2003) each console is represented by 8 
     tty's, so you should use:                                                                              
     .....                                                                                                  
     :0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -deferglyphs 16 vt7                                     
     :1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4.TNT2 vt9              
     .....                                                                                                  
                                                                                                            
     Or if you have more video cards just add more lines:                                                   
     :2 local /bin/nice -n -10 /usr/X11R6/bin/X2 :2 -xf86config /etc/X11/XF86Config-4.[your 3rd card] vt16  
     :3 local .....                                                                                         
                                                                                                            
                                                                                                            
     If you use a single XFree configuration file :                                                         
     ................                                                                                       
     :0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -layout first-Xserver -deferglyphs 16 vt7               
     :1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -layout second-Xserver vt9                              
     ................                                                                                       
-----------------------------------------------------------------------------

6.2. Configuring gdm

Gdm, as a complete rewrite of xdm, uses its own configuration file, /etc/X11/
gdm/gdm.conf. You should locate the definitions of the local X servers and
add additional X servers for the number of cards you have.

Note Note                                                                    
�    ��*�SuSE uses:                                                          
                                                                             
         ��+�/etc/X11/XF86Config                                             
                                                                             
         ��+�/etc/opt/gnome2/gdm/gdm.conf for gdm2                           
                                                                             
                                                                             
                                                                             
     ��*�Debian uses:                                                        
                                                                             
         ��+�/etc/gdm/gdm.conf for gdm                                       
                                                                             
             /etc/X11/gdm/ is a symbolic link to /etc/gdm/, so you can use   
             both paths.                                                     
                                                                             
                                                                             
                                                                             
     ��*�Red Hat and Gentoo use:                                             
                                                                             
         ��+�/etc/X11/XF86Config                                             
                                                                             
                                                                             
                                                                             

Modifications:
-----------------------------------------------------------------------------

6.2.1. Changes, Part 1

 
.......                                                                      
[servers]                                                                    
# These are the standard servers.  You can add as many you want here         
# and they will always be started.  Each line must start with a unique       
# number and that will be the display number of that server.  Usually just   
# the 0 server is used.                                                      
0=Standard                                                                   
1=Second                                                                     
.......                                                                      
                                                                             
Here, you'll have only 0=Standard. For each additional X server you should
add a definition, like here, for 1=Second.
-----------------------------------------------------------------------------

6.2.2. Changes, Part 2

..............................                                                                  
# Definition of the standard X server.                                                          
[server-Standard]                                                                               
name=Standard server                                                                            
command=/usr/X11R6/bin/X0 :0 -deferglyphs 16 -ac vt7                                            
flexible=true                                                                                   
                                                                                                
[server-Second]                                                                                 
name=Second server                                                                              
command=/usr/X11R6/bin/X1 :1 -deferglyphs 16 -xf86config /etc/X11/XF86Config-4.[your card] vt17 
flexible=true                                                                                   
..............................                                                                  
                                                                                                
And here, the exact definition of the command line for starting the X server,
very similar to the definitions in /etc/X11/xdm/Xservers (the definition of
[server-Second] is the additional one).

If you use a single XFree configuration file:
..............................                                               
# Definition of the standard X server.                                       
[server-Standard]                                                            
name=Standard server                                                         
command=/usr/X11R6/bin/X0 :0 -layout first-Xserver -deferglyphs 16 -ac vt7   
flexible=true                                                                
                                                                             
[server-Second]                                                              
name=Second server                                                           
command=/usr/X11R6/bin/X1 :1 -layout second-Xserver -deferglyphs 16 vt17     
flexible=true                                                                
..............................                                               

Note Note                                                                                           
�    Under older versions of Backstreet Ruby (released before 7. Oct 2003) each console is          
     represented by 8 tty's, so you should use:                                                     
                                                                                                    
     ..............................                                                                 
     name=Standard server                                                                           
     command=/usr/X11R6/bin/X0 :0 -deferglyphs 16 -ac vt7                                           
     ..............................                                                                 
     name=Second server                                                                             
     command=/usr/X11R6/bin/X1 :1 -deferglyphs 16 -xf86config /etc/X11/XF86Config-4.[your card] vt9 
     ..............................                                                                 
     If you use a single XFree configuration file:                                                  
     ..............................                                                                 
     name=Standard server                                                                           
     command=/usr/X11R6/bin/X0 :0 -layout first-Xserver -deferglyphs 16 -ac vt7                     
     ......                                                                                         
     name=Second server                                                                             
     command=/usr/X11R6/bin/X1 :1 -layout second-Xserver -deferglyphs 16 vt9                        
     ..............................                                                                 
-----------------------------------------------------------------------------

Chapter 7. Tweaking it

Adding customisation and automation.
-----------------------------------------------------------------------------

7.1. Using independent sound cards

Note Note                                                                    
�    In case you do not use devfs, you may need to create additional device  
     files. Take a look at [http://www.tldp.org/HOWTO/Sound-HOWTO/index.html]
     The Linux Sound HOWTO, for information on how to setup additional sound 
     cards.                                                                  
-----------------------------------------------------------------------------

7.1.1. Using aRts daemon

We have to specify different sound devices for the different Xsessions/
Displays. This is done by using the following options of aRts daemon ([http:/
/www.arts-project.org/] http://www.arts-project.org/):

��*�By OSS-free sound driver:
    -D /dev/dsp[n]                                                           
   
    where n is the number of the sound card.
   
��*�By Alsa sound driver:
    -a alsa -D hw:[n],0                                                      
   
    where n is sound card id.
   

Add these lines to your Window Manager start-up script (of course, with the
proper arguments for your setup):
real_display=`echo $DISPLAY | sed "s/://" | sed "s/\..*//"`                  
case "$real_display" in                                                      
        0)                                                                   
        artsd -F 10 -S 4096 -D /dev/dsp -s 5 -m artsmessage -l 3 -f &        
        ;;                                                                   
        1)                                                                   
        artsd -F 10 -S 4096 -D /dev/dsp1 -s 5 -m artsmessage -l 3 -f &       
        ;;                                                                   
        2)                                                                   
        artsd -F 10 -S 4096 -a alsa -D hw:4,0 -s 5 -m artsmessage -l 3 -f &  
        ;;                                                                   
esac                                                                         
                                                                             

And at the end of the file:
artsshell -q terminate                                                       

Here is an example for /usr/X11R6/bin/startenlightenment:
#!/bin/sh                                                                    
#   License: GPL                                                             
                                                                             
real_display=`echo $DISPLAY | sed "s/://" | sed "s/\..*//"`                  
case "$real_display" in                                                      
        0)                                                                   
        artsd -F 10 -S 4096 -D /dev/dsp -s 5 -m artsmessage -l 3 -f &        
        ;;                                                                   
        1)                                                                   
        artsd -F 10 -S 4096 -D /dev/dsp1 -s 5 -m artsmessage -l 3 -f &       
        ;;                                                                   
        2)                                                                   
        artsd -F 10 -S 4096 -a alsa -D hw:2,0 -s 5 -m artsmessage -l 3 -f &  
        ;;                                                                   
esac                                                                         
                                                                             
/usr/X11R6/bin/enlightenment                                                 
artsshell -q terminate                                                       
                                                                             

This will start 3 aRts daemons for 3 X servers.

 1. Daemon will use the first OSS sound device for the 1st X server.
   
 2. Daemon will use the second OSS sound device for the 2nd X server.
   
 3. Daemon will use the Alsa sound device for the 3rd X server (requires
    feedback).
   

-----------------------------------------------------------------------------
7.2. Customising the login screen

7.2.1. Using xdm

Copy /etc/X11/xdm/Xsetup_0 to /etc/X11/xdm/Xsetup_1. For additional X
servers, create the file(s) /etc/X11/xdm/Xsetup_[n], where n is the number of
the X server starting from 0.

 1. Modify the line containing the background image, to adjust the path to
    your image for the 2nd X server:
    ....                                                                      
    if [ -r /usr/share/mdk/backgrounds/default.png -a -x /usr/bin/qiv ]; then 
        /usr/bin/qiv -z /usr/share/mdk/backgrounds/default.png                
    else                                                                      
        /usr/X11R6/bin/xsetroot -solid "#21449C"                              
    fi                                                                        
    ....                                                                      
                                                                              
   
    Modified:
    ....                                                                     
    if [ -r /usr/share/mdk/backgrounds/flower.jpg -a -x /usr/bin/qiv ]; then 
        /usr/bin/qiv -z /usr/share/mdk/backgrounds/flower.jpg                
    else                                                                     
        /usr/X11R6/bin/xsetroot -solid "#21449C"                             
    fi                                                                       
    ....                                                                     
                                                                             
   
    You can also specify a different background color, with:
    ....                                                                      
    #if [ -r /usr/share/mdk/backgrounds/flower.jpg -a -x /usr/bin/qiv ]; then 
    #    /usr/bin/qiv -z /usr/share/mdk/backgrounds/flower.jpg                
    #else                                                                     
        /usr/X11R6/bin/xsetroot -solid "[your color]"                         
    #fi                                                                       
    ....                                                                      
                                                                              
   
 2. Comment out the lines which may affect the primary X server, from:
    ....                                                                     
    if [ -x /etc/X11/xinit.d/numlock ]; then                                 
        /etc/X11/xinit.d/numlock &                                           
    fi                                                                       
    ....                                                                     
                                                                             
   
    to
    ....                                                                     
    #if [ -x /etc/X11/xinit.d/numlock ]; then                                
    #    /etc/X11/xinit.d/numlock &                                          
    #fi                                                                      
    ....                                                                     
                                                                             
   
 3. Inform xdm about the existence of Xsetup_1 by modifying /etc/X11/xdm/
    xdm-config:
    ......                                                                   
    ! The following three resources set up display :0 as the console.        
    DisplayManager._0.setup:        /etc/X11/xdm/Xsetup_0                    
    DisplayManager._0.startup:      /etc/X11/xdm/GiveConsole                 
    DisplayManager._0.reset:        /etc/X11/xdm/TakeConsole                 
    DisplayManager._0.startAttempts: 1                                       
    !                                                                        
    ......                                                                   
                                                                             
   
    Modified:
    ......                                                                   
    ! The following three resources set up display :0 as the console.        
    DisplayManager._1.setup:        /etc/X11/xdm/Xsetup_1                    
    DisplayManager._0.setup:        /etc/X11/xdm/Xsetup_0                    
    DisplayManager._0.startup:      /etc/X11/xdm/GiveConsole                 
    DisplayManager._0.reset:        /etc/X11/xdm/TakeConsole                 
    DisplayManager._0.startAttempts: 1                                       
    !                                                                        
    ......                                                                   
                                                                             
   
 4. Repeat the procedure for each additional X server.
   
 5. Check here for additional customising options: [http://
    www.linuxjournal.com/article.php?sid=3325] Linux-Journal Issue 68: Linux
    Apprentice: Customising the XDM Login Screen.
   

-----------------------------------------------------------------------------
7.2.2. Using kdm

��*�I'm not really sure. This area requires feedback.
   
    Modify /usr/share/config/kdm/kdmrc, from:
    ......                                                                   
    [X-:0-Core]                                                              
    Authorize=true                                                           
    AutoLogin1st=true                                                        
    AutoLoginEnable=false                                                    
    Reset=/etc/X11/xdm/TakeConsole                                           
    Setup=/etc/X11/xdm/Xsetup_0                                              
    Startup=/etc/X11/xdm/GiveConsole                                         
                                                                             
    [X-:1-Core]                                                              
    Authorize=true                                                           
    ......                                                                   
                                                                             
   
    to
    ......                                                                   
    [X-:0-Core]                                                              
    Authorize=true                                                           
    AutoLogin1st=true                                                        
    AutoLoginEnable=false                                                    
    Reset=/etc/X11/xdm/TakeConsole                                           
    Setup=/etc/X11/xdm/Xsetup_0                                              
    Startup=/etc/X11/xdm/GiveConsole                                         
                                                                             
    [X-:1-Core]                                                              
    Authorize=true                                                           
    #AutoLogin1st=true                                                       
    #AutoLoginEnable=false                                                   
    #Reset=/etc/X11/xdm/TakeConsole                                          
    Setup=/etc/X11/xdm/Xsetup_1                                              
    #Startup=/etc/X11/xdm/GiveConsole                                        
                                                                             
    #[X-:1-Core]                                                             
    #Authorize=true                                                          
    ......                                                                   
                                                                             
   
��*�Check for additional customising options at the KDE Help Center.
   

-----------------------------------------------------------------------------
7.2.3. Using gdm

This requires gdmlogin to be used instead of gdmgreater, because using
different themes for different displays is not yet implemented in gdm. In
case you want to use gdm themes you'll have the same theme on all displays.

 1. Switch to gdmlogin by making this changes in /etc/X11/gdm/gdm.conf
   
    From:
    .....                                                                     
    # Greeter for local (non-xdmcp) logins.  Change gdmlogin to gdmgreeter to 
    # get the new graphical greeter.                                          
    Greeter=/usr/bin/gdmgreeter                                               
    .....                                                                     
   
    to
    .....                                                                     
    # Greeter for local (non-xdmcp) logins.  Change gdmlogin to gdmgreeter to 
    # get the new graphical greeter.                                          
    Greeter=/usr/bin/gdmlogin                                                 
    .....                                                                     
   
 2. Copy the file /etc/X11/gdm/Init/Default to /etc/X11/gdm/Init/:0, and /etc
    /X11/gdm/Init/:1
   
 3. Add these lines to use the background that kdm uses (you can use another
    image file as well, just change the full path to it):
    if [ -r /usr/share/mdk/backgrounds/default.png -a -x /usr/bin/qiv ]; then  
        /usr/bin/qiv -z /usr/share/mdk/backgrounds/default.png                 
    else                                                                       
        /usr/X11R6/bin/xsetroot -solid "#21449C"                               
    fi                                                                         
                                                                               
   
    You can also specify a different background color, with:
    /usr/X11R6/bin/xsetroot -solid "[your color]"                            
   
    Modified:
   
    /etc/X11/gdm/Init/:0
    #!/bin/sh                                                                 
                                                                              
    if [ -r /usr/share/mdk/backgrounds/default.png -a -x /usr/bin/qiv ]; then 
        /usr/bin/qiv -z /usr/share/mdk/backgrounds/default.png                
    else                                                                      
        /usr/X11R6/bin/xsetroot -solid "#21449C"                              
    fi                                                                        
    if [ -x /etc/X11/xinit/fixkeyboard ]; then                                
        /etc/X11/xinit/fixkeyboard                                            
    fi                                                                        
                                                                              
    exit 0                                                                    
                                                                              
   
    /etc/X11/gdm/Init/:1
    #!/bin/sh                                                                
                                                                             
    if [ -r /usr/share/mdk/backgrounds/flower.jpg -a -x /usr/bin/qiv ]; then 
        /usr/bin/qiv -z /usr/share/mdk/backgrounds/flower.jpg                
    else                                                                     
        /usr/X11R6/bin/xsetroot -solid "#21449C"                             
    fi                                                                       
                                                                             
    if [ -x /etc/X11/xinit/fixkeyboard ]; then                               
        /etc/X11/xinit/fixkeyboard                                           
    fi                                                                       
                                                                             
    exit 0                                                                   
                                                                             
   
 4. Repeat the procedure for each additional X server, using file(s) /etc/X11
    /gdm/Init/:[n], where n is the number of the display.
   
 5. Check here for additional customising options: [http://www.ibiblio.org/
    oswg/oswg-nightly/oswg/en_US.ISO_8859-1/articles/gdm-reference/
    gdm-reference/] Gnome Display Manager Reference Manual.
   

-----------------------------------------------------------------------------
7.3. 1st X server configuration file

A small part of the Mandrake init scripts /etc/rc.d/rc.sysinit (you can
append it to yours if you are missing something similar):
-----------------------------------------------------------------------------------  
# (pixel) a kind of profile for XF86Config                                           
# if no XFree=XXX given on kernel command-line, restore XF86Config.standard          
for i in XF86Config XF86Config-4; do                                                 
    if [ -L "/etc/X11/$i" ]; then                                                    
        XFree=`sed -n 's/.*XFree=\(\w*\).*/\1/p' /proc/cmdline`                      
        [ -n "$XFree" ] || XFree=standard                                            
        [ -r "/etc/X11/$i.$XFree" ] && ln -sf "$i.$XFree" "/etc/X11/$i"              
    fi                                                                               
done                                                                                 
-----------------------------------------------------------------------------------  
                                                                                     

Move your XF86Config-4 file (the one for standard kernel) to
XF86Config-4.standard, create a symbolic link from it to XF86Config-4, and
move the XF86Config-4 file (the one for Backstreet Ruby) to
XF86Config-4.bruby. For Ruby/Backstreet Ruby kernels, add to the append line
in /etc/lilo.conf, or on boot prompt "XFree=bruby", leave the standard kernel
as is.

Results:

Booting with "XFree=standard" or without "XFree=" (boot prompt or lilo.conf)
will result in linking XF86Config-4.standard to XF86Config-4; booting with 
"XFree=bruby" will link XF86Config-4.bruby to XF86Config-4, so in both
scenarios XFree can be started with the proper configuration file for the
first X server.

And what about the other X servers?

Under a standard kernel you cannot use several independent X servers, so you
should use the other XFree configuration files only under Ruby/Backstreet
Ruby - there is no need for different configuration files under standard &
bruby kernels.
-----------------------------------------------------------------------------

7.4. Number X servers started by Display managers

Here is a modified version of the previous approach. Add this to your init
scripts (I bet it's missing!):
---------------------------------------------------------------------------------------  
#                                                                                        
#the same like XF86Config but for gdm.conf & Xservers                                    
#                                                                                        
for i in xdm/Xservers gdm/gdm.conf; do                                                   
    if [ -L "/etc/X11/$i" ]; then                                                        
        DumbCon=`sed -n 's/.*dumbcon=\([0-9]*\).*/\1/p' /proc/cmdline`                   
        [ -n "$DumbCon" ] || DumbCon=0                                                   
        [ -r "/etc/X11/$i.$DumbCon" ] && ln -sf "/etc/X11/$i.$DumbCon" "/etc/X11/$i"     
    fi                                                                                   
done                                                                                     
echo "Setting up display managers for `expr $DumbCon + 1` Xservers"                      
---------------------------------------------------------------------------------------  
                                                                                         

This will adjust the proper /etc/X11/xdm/Xservers and /etc/X11/gdm/gdm.config
according to the boot line argument dumbcon=n (remember n+1= number of X
users/sessions).

You have to create the configuration files following these assumptions:

"i" only stands for /etc/X11/xdm/Xserver and /etc/X11/gdm/gdm.conf.

��*�"i.0" is used for a single X server, when dumbcon=n is not specified, or
    dumbcon=0.
   
��*�"i.1" is used by the display manager when dumbcon=1 is specified.
   
��*�"i.2" is used by the display manager when dumbcon=2 is specified.
   
��*�"i.3" is used by the display manager when dumbcon=3 is specified.
   

...and so on.

Therefore:

��*�"i.0" should contain the definition only of your original standard X
    server.
   
��*�"i.1" should contain the definitions for 2 X servers.
   
��*�"i.2" should contain the definitions for 3 X servers.
   
��*�...and so on.
   

If you boot without dumbcon=n or with dumbcon=0 (for example a standard
kernel), your display manager will start a single X server with the
corresponding XF86Config file.

If you start with dumbcon=1 the display manager will automatically start 2 X
servers.

If you start with dumbcon=2, when booting is finished you'll get 3 login
prompts on your 3 displays.

Keep in mind that each X server should have it's own configuration file, and
it should be specified in the display manager configuration file properly.
Take a look at the configuration files before restarting with an activated
display manager and this addition to your init scripts.

This can also be used if you have a single XFree configuration file (see 
Section 4.6, "For graphic cards without DRI"). In this case you will have to
specify the correct layout instead of the correct XFree configuration file.
-----------------------------------------------------------------------------

7.5. Dynamically switching the number of X servers

There is a very experimental GUI/CLI for dynamically switching the number of
running X servers. It uses the automatic configuration of the display
managers (mentioned in Section 7.4), Python, dialog for the CLI, and Xdialog
for the GUI.

Once it is more tested and bug-free, you could, for example, use it under
Backstreet Ruby to switch between 2, 3 or more X servers and a single X
server using Xinerama. So when your PC isn't used by more then one user, you
could use the other monitors under Xinerama. Or one more funny example:
you're simulating net gaming with a number of friends on your bruby Linux PC,
you have invested a bit more in an additional graphic card which is already
configured, but you don't have enough money right now to buy one more monitor
and keyboard/mouse pair. One friend of yours comes and says, "Hey guys,
that's cool. Can I join?" What would you answer? Using the GUI could result
in the following answer from your side: "No problem, just bring your
monitor,keyboard and mouse."

If you are feeling like a hacker and want to try out this BUGGY GUI/CLI,
check the current status at [http://karlovo.demon.co.uk/~svetlio/ruby-contrib
/bruby-python/] http://karlovo.demon.co.uk/~svetlio/ruby-contrib/bruby-python
/. But remember, it's not very tested, and if not configured properly it can
cause you serious troubles. Please wait until it is more stable if you are
not that familiar with Linux. If you feel comfortable enough under Linux, and
think of yourself as a hacker, please help in testing it and making it
better, bug-free and easy to configure.

-----------------------------------------------------------------------------
Chapter 8. Known problems

8.1. Hardware problems

While not exactly problems, some graphic cards do not work well, or even at
all in multi-user environments.

If you are building such a system from the beginning, check the Video
Compatibility list before buying video hardware.

Sometimes secondary graphic card(s) (for now reported only by Nvidia owners)
will refuse to start, even if they have worked flowlessly for months. One of
the following sollutions should fix the problem:

��*�Running /usr/X11R6/bin/X -probeonly on the secondary card(s) before
    initializing/ starting XFree on the primary graphic card.
   
    Some examples:
   
    /usr/X11R6/bin/X -probeonly -layout X2
   
    /usr/X11R6/bin/X -probeonly -layout X1
   
    or:
   
    /usr/X11R6/bin/X -probeonly -xf86config /etc/X11/XF86Config-4.X2
   
    /usr/X11R6/bin/X -probeonly -xf86config /etc/X11/XF86Config-4.X1
   
��*�Switching the secondary graphic card to primary, starting the system (to
    initialize the card as primary), and reverting the card to secondary.
   
��*�In case this is the only secondary card, you can try switching the order
    of the graphic cards permanently.
   

-----------------------------------------------------------------------------
8.2. Software problems

For details on solving software problems see Chapter 9, "Special notes on
some distributions."
-----------------------------------------------------------------------------

8.2.1. Incompatible userspace program:s

 1. gpm - freezy mouse under XFree86. With the current XFree86 you are losing
    VGA virtual consoles anyway.
   
    Recommended: disable.
   
 2. RedHat 8.0/9 - /bin/sysfont:
   
    You can use RedHat 7.3 consolechars instead.
   
 3. SuSE 8.1 - /etc/init.d/hwscan:
   
    Recommended: disable. If you have to install new hardware and want to use
    this service, boot with standard kernel and start it manually.
   
 4. Programs writing directly to tty's, like vcstime, cannot be used.
   
   

-----------------------------------------------------------------------------
8.2.2. Tweaks needed

 1. Mandrake 9.1 - /etc/init.d/numlock:
   
    You should change the lines including "/dev/tty[0-8]" to "/dev/tty[0-7]".
   
 2. SuSE 8.1 - /etc/init.d/kbd:
   
    Add this line in the very beginning of the file:
    KBD_TTY="tty0 tty2 tty3 tty4 tty5 tty6 tty7"                             
   

-----------------------------------------------------------------------------
Chapter 9. Special notes on some distributions

9.1. Mandrake

Almost everything is easy to accomplish (probably because I've used it for
2-3 years, at least).

 1. Just a small tweak in /etc/init.d/numlock:
    --- /etc/init.d/numlock.orig    2003-04-11 00:58:55.000000000 +0200      
    +++ /etc/init.d/numlock 2003-03-19 13:03:30.000000000 +0100              
    @@ -21,14 +21,14 @@                                                      
            echo                                                             
            touch $SYSCONF_FILE                                              
                                                                             
    -       for tty in /dev/tty[0-8]; do                                     
    +       for tty in /dev/tty[0-7]; do                                     
                    setleds -D +num < $tty                                   
            done                                                             
                                                                             
            ;;                                                               
       stop)                                                                 
            gprintf "Disabling numlocks on ttys: "                           
    -       for tty in /dev/tty[0-8]; do                                     
    +       for tty in /dev/tty[0-7]; do                                     
                    setleds -D -num < $tty                                   
            done                                                             
            echo_success                                                     
                                                                             
   

-----------------------------------------------------------------------------
9.2. Red Hat

 1. Replacing sysfont with consolechars.
   
    < needs to be written >
   
    Rebuild console-tools-19990829-40.src.rpm using rpmbuild --rebuild
    console-tools-19990829-40.src.rpm. You can find the source rpm on [http:/
    /www.rpmfind.net] http://www.rpmfind.net).
   
    Then install it:
   
    rpm -Uvh /usr/src/redhat/RPMS/i386/console-tools-19990829-40.i386.rpm
   
    I still seem to have some kind of problem, because on the console I
    always get:
   
       findfont no such file or directory unable to setfont xxx
   
    But everything else seems okay.
   

-----------------------------------------------------------------------------
9.3. Debian

There are no known problems.
-----------------------------------------------------------------------------

9.4. SuSE

 1. In /etc/init.d/kbd, add this line in the very beginning of the file:
    KBD_TTY="tty0 tty2 tty3 tty4 tty5 tty6 tty7"                             
   
    After modifications:
    #! /bin/sh                                                                
    # Copyright (c) 1995-2001 SuSE GmbH Nuernberg, Germany.                   
    #                                                                         
    # Author:   Burchard Steinbild <bs@suse.de>                               
    #           Werner Fink <werner@suse.de>                                  
    #                                                                         
    # /etc/init.d/kbd                                                         
    #                                                                         
    #   and symbolic its link                                                 
    #                                                                         
    # /sbin/rckbd                                                             
    #                                                                         
    ### BEGIN INIT INFO                                                       
    # Provides:       kbd                                                     
    # Required-Start: $remote_fs                                              
    # Required-Stop:                                                          
    # X-SuSE-Should-Start:  fbset serial                                      
    # X-SuSE-Should-Stop:                                                     
    # Default-Start:  1 2 3 5 S                                               
    # Default-Stop:                                                           
    # Description:    Keyboard settings (don't disable!)                      
    ### END INIT INFO                                                         
                                                                              
    . /etc/rc.status                                                          
    . /etc/sysconfig/console                                                  
    . /etc/sysconfig/keyboard                                                 
                                                                              
    MACHINE=`/bin/uname -m 2> /dev/null`                                      
    if [ "$MACHINE" = "sparc" -o "$MACHINE" = "sparc64" ]; then               
       # Test if we have a serial console.                                    
       (test -c /dev/tty1 && > /dev/tty1 ) > /dev/null 2>&1 || exit 0         
    fi                                                                        
                                                                              
    # The variable NON_SUSE_KERNEL determines whether we need to chvt         
    # to a console before some console settings apply.                        
    # We have no magic to find out about this (at boot time), so we           
    # leave it to the user to read this comment and put NON_SUSE_KERNEL="yes" 
    # into /etc/sysconfig/console                                             
                                                                              
    KBDBASE="/usr/share/kbd"                                                  
                                                                              
    KBD_TTY="tty0 tty2 tty3 tty4 tty5 tty6 tty7"                              
    KTABLE=${KEYTABLE%.map*}                                                  
    KTABLE=${KTABLE##*/}                                                      
    #                                                                         
    # first search the wanted keytable.                                       
    #                                                                         
    if [ $MACHINE = ppc -o $MACHINE = ppc64 ]; then                           
            test -f /proc/cpuinfo || mount -n -t proc proc /proc 2>/dev/null  
            while read line; do                                               
    ......                                                                    
    ......                                                                    
                                                                              
   
 2. Hardware scans sometimes cause problems.
   
    Recommended: disable. If you have to install new hardware and want to use
    this service, boot with standard kernel and start it manually.
   

-----------------------------------------------------------------------------
Chapter 10. Final words

Have some comments? Send them to Svetoslav Slavtchev, <svetoslav (at)
users.sourcefourge.net>.

Difficulty understanding the HOWTO? Some parts are not clear? Drop a line to
the above address.

In case you experience troubles in configuring the system, feel free to
contact me or the linuxconsole mailing list.

Please send as many details as possible, the most important information would
be (from a running Backstreet Ruby kernel):

��*�output from dmesg
   
��*�output from lsmod
   
��*�output from cat /proc/bus/console/*/*
   
��*�contents of /proc/bus/input/devices
   
��*�contents of /proc/bus/usb/devices
   
��*�contents of the XFree configuration file(s) /etc/X11/XF86Config(-4)
   
��*�contents of the XFree86 log files /var/log/XFree86.[n].log
   

You got it running? Congratulations! Drop a line, give some details on your
configuration and attach your XFree configuration files.
-----------------------------------------------------------------------------

Appendix A. Video Compatibility list

This is an extract from the Video Compatibility list at the Backstreet Ruby
home page.
-----------------------------------------------------------------------------

A.1. Graphic card pairs/triples that work perfectly

A.1.1. Modified X server not needed

Voodoo Graphics (glide) + Voodoo 3 (pci)(tdfx)

Voodoo Graphics (glide) + Riva TNT2 M64 (agp)(nvidia)

-----------------------------------------------------------------------------
A.1.2. Modified X server needed

ATI Radeon 7000(AGP)+ Matrox Mystique (PCI)

AGP S3 Inc. 86c368[Trio 3D/2X]+Matrox MGA1064SG[Mystique] (PCI)

Nvidia cards

Riva TNT (PCI+PCI+AGP)

Riva TNT2 M64 (pci)(nvidia) + Riva TNT2 M64 (pci)(nvidia)

Riva TNT2 M64 (agp)(nvidia) + GeForce4MX(PCI)

Nvidia GeForce2MX(PCI) + GeForce2MX(PCI) + GeForce2MX(PCI) + GeForce2MX(PCI)

Works fine. DRI + Nvidia GLX works too.

Voodoo 3 (pci)(tdfx) + Riva TNT2 M64 (agp)(nvidia)

ATI Radeon 7500(AGP) + Nvidia TNT2(PCI)
-----------------------------------------------------------------------------

A.2. Graphic card pairs/triples that work, but with some glitches

��*�Generally the X server driving the AGP card has to be started first.
   
    This can be acomplished by manually starting X or using gdm as desktop
    manager. You'll have to abstain from using xdm or kdm, as they start the
    X servers at the same time.
   
��*�AGP sever restart leads to system crashes. In gdm.conf, set
    AlwaysRestartServer=false.
   
��*�The XFree-4.3-prefbusid patch/binary fixes most of the problems. In case
    the X servers are started in the right order there are no lock ups.
   

Nvidia TNT2(AGP) + Matrox Mystique(PCI)

Nvidia TNT2(AGP) + S3 VIRGE/DX(PCI)

Nvidia GeForce4MX440(AGP) + TNT2M64(PCI) + TNT2M64(PCI)

Matrox MGAG400(AGP) + Matrox MGA1064SG[Mystique]PCI

Matrox MGAG450DH(AGP) + ATI Mach 64(PCI)

Matrox MGAG550DH(AGP) + Riva TNT2-M64(PCI)

Matrox MGAG550DH(AGP) + Geforce4 420(PCI)
-----------------------------------------------------------------------------

Appendix B. Example configuration files

For more examples visit [http://karlovo.demon.co.uk/~svetlio/examples/] http:
//karlovo.demon.co.uk/~svetlio/examples/.
-----------------------------------------------------------------------------

B.1. XFree86

-----------------------------------------------------------------------------
B.1.1. 1st XFree server configuration file

# File generated by XFdrake.                                                        
                                                                                    
# **********************************************************************            
# Refer to the XF86Config(4/5) man page for details about the format of             
# this file.                                                                        
# **********************************************************************            
                                                                                    
Section "Files"                                                                     
                                                                                    
    RgbPath     "/usr/X11R6/lib/X11/rgb"                                            
                                                                                    
# Multiple FontPath entries are allowed (they are concatenated together)            
# By default, Mandrake 6.0 and later now use a font server independent of           
# the X server to render fonts.                                                     
                                                                                    
                                                                                    
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Server flags section.                                                             
# **********************************************************************            
                                                                                    
Section "ServerFlags"                                                               
                                                                                    
    # Uncomment this to cause a core dump at the spot where a signal is             
    # received.  This may leave the console in an unusable state, but may           
    # provide a better stack trace in the core dump to aid in debugging             
    #NoTrapSignals                                                                  
                                                                                    
    # Uncomment this to disable the <Crtl><Alt><BS> server abort sequence           
    # This allows clients to receive this key event.                                
    #DontZap                                                                        
                                                                                    
    # Uncomment this to disable the <Crtl><Alt><KP_+>/<KP_-> mode switching         
    # sequences.  This allows clients to receive these key events.                  
    #DontZoom                                                                       
                                                                                    
    # This  allows  the  server  to start up even if the                            
    # mouse device can't be opened/initialised.                                     
    AllowMouseOpenFail                                                              
                                                                                    
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Input devices                                                                     
# **********************************************************************            
                                                                                    
# **********************************************************************            
# Keyboard section                                                                  
# **********************************************************************            
                                                                                    
Section "InputDevice"                                                               
                                                                                    
    Identifier "Keyboard1"                                                          
    Driver      "Keyboard"                                                          
    Option "AutoRepeat"  "250 30"                                                   
                                                                                    
    Option "XkbRules" "xfree86"                                                     
    Option "XkbModel" "pc105"                                                       
    Option "XkbLayout" "de(nodeadkeys)"                                             
                                                                                    
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Pointer section                                                                   
# **********************************************************************            
                                                                                    
Section "InputDevice"                                                               
                                                                                    
    Identifier  "Mouse1"                                                            
    Driver      "mouse"                                                             
    Option "Protocol"    "IMPS/2"                                                   
#    Option "Device"      "/dev/psaux"                                              
    Option "Device"      "/dev/input/mouse1"                                        
    Option "ZAxisMapping" "4 5"                                                     
                                                                                    
# ChordMiddle is an option for some 3-button Logitech mice                          
    Option "Emulate3Buttons"                                                        
#    Option "ChordMiddle"                                                           
                                                                                    
EndSection                                                                          
                                                                                    
                                                                                    
                                                                                    
Section "Module"                                                                    
                                                                                    
# This loads the DBE extension module.                                              
    Load        "dbe"                                                               
    Load        "GLcore"                                                            
#    Load       "dga"                                                               
    Load        "glx"                                                               
    Load        "extmod"                                                            
    Load        "dri"                                                               
# pass two from mga mailing-lists                                                   
#    Load       "pex5"                                                              
#    Load       "xie"                                                               
    Load        "bitmap"                                                            
    Load        "record"                                                            
    Load        "vbe"                                                               
    Load        "int10"                                                             
# end pass two mga mailing-lists                                                    
                                                                                    
                                                                                    
# This loads the Video for Linux module.                                            
    Load        "v4l"                                                               
                                                                                    
                                                                                    
# This loads the miscellaneous extensions module, and disables                      
# initialisation of the XFree86-DGA extension within that module.                   
                                                                                    
    SubSection  "extmod"                                                            
        #Option "omit xfree86-dga"                                                  
    EndSubSection                                                                   
                                                                                    
# This loads the Type1 and FreeType font modules                                    
                                                                                    
    Load        "type1"                                                             
    Load        "freetype"                                                          
EndSection                                                                          
                                                                                    
Section "DRI"                                                                       
    Mode        0666                                                                
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Monitor section                                                                   
# **********************************************************************            
                                                                                    
# Any number of monitor sections may be present                                     
                                                                                    
Section "Monitor"                                                                   
    Identifier "Generic|Monitor that can do 1600x1200 at 70 Hz"                     
    VendorName "Unknown"                                                            
    ModelName  "Unknown"                                                            
                                                                                    
                                                                                    
# HorizSync is in kHz unless units are specified.                                   
# HorizSync may be a comma separated list of discrete values, or a                  
# comma separated list of ranges of values.                                         
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S                 
# USER MANUAL FOR THE CORRECT NUMBERS.                                              
    HorizSync  30-98                                                                
                                                                                    
                                                                                    
# VertRefresh is in Hz unless units are specified.                                  
# VertRefresh may be a comma separated list of discrete values, or a                
# comma separated list of ranges of values.                                         
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S                 
# USER MANUAL FOR THE CORRECT NUMBERS.                                              
    VertRefresh 50-160                                                              
                                                                                    
                                                                                    
# This is a set of extended mode timings typically used for laptop,                 
# TV fullscreen mode or DVD fullscreen output.                                      
# These are available along with standard mode timings.                             
                                                                                    
# Sony Vaio C1(X,XS,VE,VN)?                                                         
# 1024x480 @ 85.6 Hz, 48 kHz hsync                                                  
ModeLine "1024x480"    65.00 1024 1032 1176 1344   480  488  494  563 -hsync -vsync 
                                                                                    
# 768x576 @ 79 Hz, 50 kHz hsync                                                     
ModeLine "768x576"     50.00  768  832  846 1000   576  590  595  630               
# 768x576 @ 100 Hz, 61.6 kHz hsync                                                  
ModeLine "768x576"     63.07  768  800  960 1024   576  578  590  616               
                                                                                    
                                                                                    
EndSection                                                                          
                                                                                    
                                                                                    
Section "Monitor"                                                                   
    Identifier "monitor2"                                                           
    VendorName "Unknown"                                                            
    ModelName  "Unknown"                                                            
                                                                                    
    HorizSync   30-98                                                               
    VertRefresh 50-160                                                              
EndSection                                                                          
                                                                                    
                                                                                    
Section "Monitor"                                                                   
    Identifier "monitor3"                                                           
    VendorName "Unknown"                                                            
    ModelName  "Unknown"                                                            
                                                                                    
    HorizSync   31.5-60.0                                                           
    VertRefresh 56.0-75.0                                                           
EndSection                                                                          
                                                                                    
                                                                                    
                                                                                    
# **********************************************************************            
# Graphics device section                                                           
# **********************************************************************            
                                                                                    
Section "Device"                                                                    
    Identifier "Generic VGA"                                                        
    Driver     "vga"                                                                
EndSection                                                                          
                                                                                    
                                                                                    
Section "Device"                                                                    
    Identifier  "g550_1"                                                            
    VendorName  ""                                                                  
    BoardName   ""                                                                  
    Driver      "mga"                                                               
    # Clock lines                                                                   
                                                                                    
                                                                                    
    # Uncomment following option if you see a big white block                       
    # instead of the cursor!                                                        
    #    Option      "sw_cursor"                                                    
    Option      "AGPMode" "4"                                                       
#    Option      "HWCursor" "Off"                                                   
    Option      "HWCursor" "On"                                                     
    Option      "MGASDRAM" "On"                                                     
    Option      "DPMS"  "Off"                                                       
    # Screen 0                                                                      
    BusID       "PCI:1:0:0"                                                         
EndSection                                                                          
                                                                                    
                                                                                    
Section "Device"                                                                    
    Identifier  "g550_2"                                                            
    VendorName  ""                                                                  
    BoardName   ""                                                                  
    Driver      "mga"                                                               
    # Clock lines                                                                   
                                                                                    
                                                                                    
    # Uncomment following option if you see a big white block                       
    # instead of the cursor!                                                        
    #    Option      "sw_cursor"                                                    
    Option      "AGPMode" "4"                                                       
    Option      "MGASDRAM" "On"                                                     
#    Option      "HWCursor" "Off"                                                   
    Option      "HWCursor" "On"                                                     
    Option      "DPMS"  "Off"                                                       
    # Screen 1                                                                      
    BusID       "PCI:1:0:0"                                                         
EndSection                                                                          
                                                                                    
                                                                                    
                                                                                    
# **********************************************************************            
# Screen sections                                                                   
# **********************************************************************            
                                                                                    
Section "Screen"                                                                    
    Identifier "screen1"                                                            
    Device      "g550_1"                                                            
    Monitor     "monitor2"                                                          
    DefaultColorDepth 16                                                            
    Subsection "Display"                                                            
        Depth       8                                                               
        Modes       "1280x1024" "1024x768" "800x600" "640x480"                      
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       15                                                              
        Modes       "1280x1024" "1024x768" "800x600" "640x480"                      
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       16                                                              
        Modes       "1280x1024" "1024x768" "800x600" "640x480"                      
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       24                                                              
        Modes       "1280x1024" "1024x768" "800x600" "640x480"                      
        ViewPort    0 0                                                             
    EndSubsection                                                                   
EndSection                                                                          
                                                                                    
                                                                                    
Section "ServerLayout"                                                              
    Identifier "layout1"                                                            
    Screen     "screen1"                                                            
    Option      "SingleCard" "true"                                                 
                                                                                    
    InputDevice "Mouse1" "CorePointer"                                              
    InputDevice "Keyboard1" "CoreKeyboard"                                          
EndSection                                                                          
                                                                                    
-----------------------------------------------------------------------------

B.1.2. 2nd XFree server configuration file

# File generated by XFdrake.                                                        
                                                                                    
# **********************************************************************            
# Refer to the XF86Config(4/5) man page for details about the format of             
# this file.                                                                        
# **********************************************************************            
                                                                                    
Section "Files"                                                                     
                                                                                    
    RgbPath     "/usr/X11R6/lib/X11/rgb"                                            
    ModulePath  "/usr/X11R6/libNV/modules"                                          
# Multiple FontPath entries are allowed (they are concatenated together)            
# By default, Mandrake 6.0 and later now use a font server independent of           
# the X server to render fonts.                                                     
                                                                                    
                                                                                    
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Server flags section.                                                             
# **********************************************************************            
                                                                                    
Section "ServerFlags"                                                               
                                                                                    
    # Uncomment this to cause a core dump at the spot where a signal is             
    # received.  This may leave the console in an unusable state, but may           
    # provide a better stack trace in the core dump to aid in debugging             
    #NoTrapSignals                                                                  
                                                                                    
    # Uncomment this to disable the <Crtl><Alt><BS> server abort sequence           
    # This allows clients to receive this key event.                                
    #DontZap                                                                        
                                                                                    
    # Uncomment this to disable the <Crtl><Alt><KP_+>/<KP_-> mode switching         
    # sequences.  This allows clients to receive these key events.                  
    #DontZoom                                                                       
                                                                                    
    # This  allows  the  server  to start up even if the                            
    # mouse device can't be opened/initialised.                                     
    AllowMouseOpenFail                                                              
                                                                                    
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Input devices                                                                     
# **********************************************************************            
                                                                                    
# **********************************************************************            
# Keyboard section                                                                  
# **********************************************************************            
                                                                                    
Section "InputDevice"                                                               
                                                                                    
    Identifier "Keyboard1"                                                          
    Driver      "Keyboard"                                                          
    Option "AutoRepeat"  "250 30"                                                   
                                                                                    
    Option "XkbRules" "xfree86"                                                     
    Option "XkbModel" "pc105"                                                       
    Option "XkbLayout" "de(nodeadkeys)"                                             
                                                                                    
EndSection                                                                          
                                                                                    
# **********************************************************************            
# Pointer section                                                                   
# **********************************************************************            
                                                                                    
Section "InputDevice"                                                               
                                                                                    
    Identifier  "Mouse1"                                                            
    Driver      "mouse"                                                             
    Option "Protocol"    "PS/2"                                                     
    Option "Device"      "/dev/input/mouse0"                                        
    Option "Emulate3Buttons"                                                        
#    Option "ZAxisMapping" "4 5"                                                    
                                                                                    
# ChordMiddle is an option for some 3-button Logitech mice                          
                                                                                    
#    Option "ChordMiddle"                                                           
                                                                                    
EndSection                                                                          
                                                                                    
                                                                                    
Section "Module"                                                                    
                                                                                    
# This loads the DBE extension module.                                              
    Load        "dbe"                                                               
    Load        "glx"                                                               
    Load        "vbe"                                                               
    Load        "int10"                                                             
                                                                                    
# This loads the Video for Linux module.                                            
#    Load        "v4l"                                                              
                                                                                    
                                                                                    
# This loads the miscellaneous extensions module, and disables                      
# initialisation of the XFree86-DGA extension within that module.                   
                                                                                    
    SubSection  "extmod"                                                            
        #Option "omit xfree86-dga"                                                  
    EndSubSection                                                                   
                                                                                    
# This loads the Type1 and FreeType font modules                                    
                                                                                    
    Load        "type1"                                                             
    Load        "freetype"                                                          
EndSection                                                                          
                                                                                    
#Section "DRI"                                                                      
#    Mode       0666                                                                
#EndSection                                                                         
                                                                                    
# **********************************************************************            
# Monitor section                                                                   
# **********************************************************************            
                                                                                    
# Any number of monitor sections may be present                                     
                                                                                    
Section "Monitor"                                                                   
    Identifier "Generic|Monitor that can do 1600x1200 at 70 Hz"                     
    VendorName "Unknown"                                                            
    ModelName  "Unknown"                                                            
                                                                                    
                                                                                    
# HorizSync is in kHz unless units are specified.                                   
# HorizSync may be a comma separated list of discrete values, or a                  
# comma separated list of ranges of values.                                         
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S                 
# USER MANUAL FOR THE CORRECT NUMBERS.                                              
    HorizSync  30-98                                                                
                                                                                    
                                                                                    
# VertRefresh is in Hz unless units are specified.                                  
# VertRefresh may be a comma separated list of discrete values, or a                
# comma separated list of ranges of values.                                         
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S                 
# USER MANUAL FOR THE CORRECT NUMBERS.                                              
    VertRefresh 50-160                                                              
                                                                                    
                                                                                    
# This is a set of extended mode timings typically used for laptop,                 
# TV fullscreen mode or DVD fullscreen output.                                      
# These are available along with standard mode timings.                             
                                                                                    
# Sony Vaio C1(X,XS,VE,VN)?                                                         
# 1024x480 @ 85.6 Hz, 48 kHz hsync                                                  
ModeLine "1024x480"    65.00 1024 1032 1176 1344   480  488  494  563 -hsync -vsync 
                                                                                    
# 768x576 @ 79 Hz, 50 kHz hsync                                                     
ModeLine "768x576"     50.00  768  832  846 1000   576  590  595  630               
# 768x576 @ 100 Hz, 61.6 kHz hsync                                                  
ModeLine "768x576"     63.07  768  800  960 1024   576  578  590  616               
                                                                                    
                                                                                    
EndSection                                                                          
                                                                                    
                                                                                    
Section "Monitor"                                                                   
    Identifier "monitor2"                                                           
    VendorName "Unknown"                                                            
    ModelName  "Unknown"                                                            
                                                                                    
#    HorizSync   30-98                                                              
#    VertRefresh 50-160                                                             
                                                                                    
    HorizSync   30-50                                                               
    VertRefresh 50-120                                                              
EndSection                                                                          
                                                                                    
                                                                                    
                                                                                    
# **********************************************************************            
# Graphics device section                                                           
# **********************************************************************            
                                                                                    
Section "Device"                                                                    
    Identifier "Generic VGA"                                                        
    Driver     "vga"                                                                
EndSection                                                                          
                                                                                    
Section "Device"                                                                    
    Identifier  "nv"                                                                
    VendorName  ""                                                                  
    BoardName   ""                                                                  
    Driver      "nvidia"                                                            
    # Clock lines                                                                   
                                                                                    
                                                                                    
    # Uncomment following option if you see a big white block                       
    # instead of the cursor!                                                        
    #    Option      "sw_cursor"                                                    
    Option      "UseInt10Module" "off"                                              
    Option      "ConnectedMonitor" "CRT"                                            
    Option      "IgnoreEDID" "off"                                                  
    Option      "HWCursor" "on"                                                     
                                                                                    
    Option      "DPMS"  "Off"                                                       
    Option      "NoLogo" "On"                                                       
    BusID       "PCI:0:10:0"                                                        
EndSection                                                                          
                                                                                    
                                                                                    
# **********************************************************************            
# Screen sections                                                                   
# **********************************************************************            
                                                                                    
Section "Screen"                                                                    
    Identifier "screen1"                                                            
    Device      "nv"                                                                
    Monitor     "monitor2"                                                          
    DefaultColorDepth 24                                                            
    Subsection "Display"                                                            
        Depth       8                                                               
        Modes       "800x600" "640x480"                                             
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       15                                                              
        Modes       "800x600" "640x480"                                             
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       16                                                              
        Modes       "800x600" "640x480"                                             
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       24                                                              
        Modes       "1024x768" "800x600" "640x480"                                  
        ViewPort    0 0                                                             
    EndSubsection                                                                   
    Subsection "Display"                                                            
        Depth       32                                                              
        Modes       "1280x1024" "800x600" "640x480"                                 
        ViewPort    0 0                                                             
    EndSubsection                                                                   
EndSection                                                                          
                                                                                    
                                                                                    
Section "ServerLayout"                                                              
    Identifier "layout1"                                                            
    Screen     "screen1"                                                            
    Option      "SingleCard" "true"                                                 
                                                                                    
    InputDevice "Mouse1" "CorePointer"                                              
    InputDevice "Keyboard1" "CoreKeyboard"                                          
                                                                                    
EndSection                                                                          
                                                                                    
-----------------------------------------------------------------------------

B.2. Display managers

-----------------------------------------------------------------------------
B.2.1. xdm and kdm

/etc/X11/xdm/Xservers.0
# $XConsortium: Xserv.ws.cpp,v 1.3 93/09/28 14:30:30 gildea Exp $                                
#                                                                                                
#                                                                                                
# $XFree86: xc/programs/xdm/config/Xserv.ws.cpp,v 1.1.1.1.12.2 1998/10/04 15:23:14 hohndel Exp $ 
#                                                                                                
# Xservers file, workstation prototype                                                           
#                                                                                                
# This file should contain an entry to start the server on the                                   
# local display; if you have more than one display (not screen),                                 
# you can add entries to the list (one per line).  If you also                                   
# have some X terminals connected which do not support XDMCP,                                    
# you can add them here as well.  Each X terminal line should                                    
# look like:                                                                                     
#       XTerminalName:0 foreign                                                                  
#                                                                                                
:0 local /bin/nice -n -10 /usr/X11R6/bin/X -deferglyphs 16 vt7                                   
                                                                                                 

/etc/X11/xdm/Xservers.1
# $XConsortium: Xserv.ws.cpp,v 1.3 93/09/28 14:30:30 gildea Exp $                                        
#                                                                                                        
#                                                                                                        
# $XFree86: xc/programs/xdm/config/Xserv.ws.cpp,v 1.1.1.1.12.2 1998/10/04 15:23:14 hohndel Exp $         
#                                                                                                        
# Xservers file, workstation prototype                                                                   
#                                                                                                        
# This file should contain an entry to start the server on the                                           
# local display; if you have more than one display (not screen),                                         
# you can add entries to the list (one per line).  If you also                                           
# have some X terminals connected which do not support XDMCP,                                            
# you can add them here as well.  Each X terminal line should                                            
# look like:                                                                                             
#       XTerminalName:0 foreign                                                                          
#                                                                                                        
:0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -deferglyphs 16 vt7                                       
:1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4.X1 -deferglyphs 16 vt17 
                                                                                                         

(Not really used by me.)

/etc/X11/xdm/Xservers.2
# $XConsortium: Xserv.ws.cpp,v 1.3 93/09/28 14:30:30 gildea Exp $                                        
#                                                                                                        
#                                                                                                        
# $XFree86: xc/programs/xdm/config/Xserv.ws.cpp,v 1.1.1.1.12.2 1998/10/04 15:23:14 hohndel Exp $         
#                                                                                                        
# Xservers file, workstation prototype                                                                   
#                                                                                                        
# This file should contain an entry to start the server on the                                           
# local display; if you have more than one display (not screen),                                         
# you can add entries to the list (one per line).  If you also                                           
# have some X terminals connected which do not support XDMCP,                                            
# you can add them here as well.  Each X terminal line should                                            
# look like:                                                                                             
#       XTerminalName:0 foreign                                                                          
#                                                                                                        
:0 local /bin/nice -n -10 /usr/X11R6/bin/X0 :0 -deferglyphs 16 vt7                                       
:1 local /bin/nice -n -10 /usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4.X1 -deferglyphs 16 vt17 
:2 local /bin/nice -n -10 /usr/X11R6/bin/X2 :2 -xf86config /etc/X11/XF86Config-4.X2 -deferglyphs 16 vt18 
                                                                                                         
-----------------------------------------------------------------------------

B.2.2. gdm

/etc/X11/gdm/gdm.conf.0
# GDM Configuration file.  You can use gdmsetup program to graphically                           
# edit this, or you can optionally just edit this file by hand.  Note that                       
# gdmsetup does not tweak every option here, just the ones most users                            
# would care about.  Rest is for special setups and distro specific                              
# tweaks.  If you edit this file, you should send the HUP or USR1 signal to                      
# the daemon so that it restarts: (Assuming you have not changed PidFile)                        
#   kill -USR1 `cat /var/run/gdm.pid`                                                            
# (HUP will make gdm restart immediately while USR1 will make gdm not kill                       
# existing sessions and will only restart gdm after all users log out)                           
#                                                                                                
# You can also use the gdm-restart and gdm-safe-restart scripts which just                       
# do the above for you.                                                                          
#                                                                                                
# Have fun! - George                                                                             
                                                                                                 
[daemon]                                                                                         
# Automatic login, if true the first local screen will automatically logged                      
# in as user as set with AutomaticLogin key.                                                     
AutomaticLoginEnable=false                                                                       
AutomaticLogin=                                                                                  
# Timed login, useful for kiosks.  Log in a certain user after a certain                         
# amount of time                                                                                 
TimedLoginEnable=false                                                                           
TimedLogin=                                                                                      
TimedLoginDelay=30                                                                               
# A comma separated list of users that will be logged in without having                          
# to authenticate on local screens (not over xdmcp).  Note that 'root'                           
# is ignored and will always have to authenticate.                                               
LocalNoPasswordUsers=                                                                            
# If you are having trouble with using a single server for a long time and                       
# want gdm to kill/restart the server, turn this on                                              
AlwaysRestartServer=false                                                                        
# The gdm configuration program that is run from the login screen, you should                    
# probably leave this alone                                                                      
Configurator=/usr/sbin/gdmsetup --disable-sound --disable-crash-dialog                           
GnomeDefaultSession=/usr/share/gnome/default.session                                             
# The chooser program.  Must output the chosen host on stdout, probably you                      
# should leave this alone                                                                        
Chooser=/usr/bin/gdmchooser                                                                      
# Default path to set.  The profile scripts will likely override this                            
DefaultPath=/bin:/usr/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/local/bin:/usr/bin                    
# Default path for root.  The profile scripts will likely override this                          
RootPath=/sbin:/usr/sbin:/bin:/usr/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/local/bin:/usr/bin       
DisplayInitDir=/etc/X11/gdm/Init                                                                 
# Greeter for local (non-xdmcp) logins.  Change gdmlogin to gdmgreeter to                        
# get the new graphical greeter.                                                                 
Greeter=/usr/bin/gdmgreeter                                                                      
# Greeter for xdmcp logins, usually you want a less graphically intensive                        
# greeter here so it's better to leave this with gdmlogin                                        
RemoteGreeter=/usr/bin/gdmlogin                                                                  
# User and group that gdm should run as.  Probably should be gdm and gdm and                     
# you should create these user and group.  Anyone found running this as                          
# someone too privilaged will get a kick in the ass.  This should have                           
# access to only the gdm directories and files.                                                  
User=gdm                                                                                         
Group=gdm                                                                                        
# To try to kill all clients started at greeter time or in the Init script.                      
# doesn't always work, only if those clients have a window of their own                          
KillInitClients=true                                                                             
LogDir=/var/lib/gdm                                                                              
# You should probably never change this value unless you have a weird setup                      
PidFile=/var/run/gdm.pid                                                                         
PostSessionScriptDir=/etc/X11/gdm/PostSession/                                                   
PreSessionScriptDir=/etc/X11/gdm/PreSession/                                                     
# Distributions:  If you have some script that runs an X server in say                           
# VGA mode, allowing a login, could you please send it to me?                                    
FailsafeXServer=                                                                                 
# if X keeps crashing on us we run this script.  The default one does a bunch                    
# of cool stuff to figure out what to tell the user and such and can                             
# run an X configuration program.                                                                
XKeepsCrashing=/etc/X11/gdm/XKeepsCrashing                                                       
# Reboot, Halt and suspend commands, you can add different commands                              
# separated by a semicolon and gdm will use the first one it can find                            
RebootCommand=/sbin/shutdown -r now;/usr/sbin/shutdown -r now                                    
HaltCommand=/usr/bin/poweroff;/sbin/poweroff;/sbin/shutdown -h now;/usr/sbin/shutdown -h now     
SuspendCommand=                                                                                  
# Probably should not touch the below this is the standard setup                                 
ServAuthDir=/var/lib/gdm                                                                         
SessionDir=/etc/X11/gdm/Sessions/                                                                
# Better leave this blank and HOME will be used.  You can use syntax ~/ below                    
# to indicate home directory of the user                                                         
UserAuthDir=                                                                                     
# Fallback if home directory not writable                                                        
UserAuthFBDir=/tmp                                                                               
UserAuthFile=.Xauthority                                                                         
# The X server to use if we can't figure out what else to run.                                   
StandardXServer=/usr/X11R6/bin/X                                                                 
# The maximum number of flexible X servers to run.                                               
FlexibleXServers=5                                                                               
# the X nest command                                                                             
Xnest=/usr/X11R6/bin/Xnest -name Xnest                                                           
# Automatic VT allocation.  Right now only works on Linux.  This way                             
# we force X to use specific vts.  turn VTAllocation to false if this                            
# is causing problems.                                                                           
FirstVT=7                                                                                        
VTAllocation=false                                                                               
                                                                                                 
[security]                                                                                       
# If any distributions ship with this one off, they should be shot                               
# this is only local, so it's only for say kiosk use, when you                                   
# want to minimize possibility of breakin                                                        
AllowRoot=true                                                                                   
# If you want to be paranoid, turn this one off                                                  
AllowRemoteRoot=true                                                                             
# This will allow remote timed login                                                             
AllowRemoteAutoLogin=false                                                                       
# 0 is the most anal, 1 allows group write permissions, 2 allows all write permissions           
RelaxPermissions=0                                                                               
RetryDelay=3                                                                                     
# Maximum size of a file we wish to read.  This makes it hard for a user to DoS us               
# by using a large file.                                                                         
UserMaxFile=65536                                                                                
# Maximum size of the session file.  This is larger because it matters less as we                
# never keep it all in memory.  Just has an upper limit so that we don't go into too             
# long of a loop                                                                                 
SessionMaxFile=524388                                                                            
                                                                                                 
# XDMCP is the protocol that allows remote login.  If you want to log into                       
# gdm remotely (I'd never turn this on on open network, use ssh for such                         
# remote usage that).  You can then run X with -query <thishost> to log in,                      
# or -indirect <thishost> to run a chooser.  Look for the 'Terminal' server                      
# type at the bottom of this config file.                                                        
[xdmcp]                                                                                          
# Distributions: Ship with this off.  It is never a safe thing to leave                          
# out on the net.  Alternatively you can set up /etc/hosts.allow and                             
# /etc/hosts.deny to only allow say local access.                                                
Enable=false                                                                                     
# Honour indirect queries, we run a chooser for these, and then redirect                         
# the user to the chosen host.  Otherwise we just log the user in locally.                       
HonorIndirect=true                                                                               
# Maximum pending requests                                                                       
MaxPending=4                                                                                     
MaxPendingIndirect=4                                                                             
# Maximum open XDMCP sessions at any point in time                                               
MaxSessions=16                                                                                   
# Maximum wait times                                                                             
MaxWait=15                                                                                       
MaxWaitIndirect=15                                                                               
# How many times can a person log in from a single host.  Usually better to                      
# keep at 1 to fend off DoS attacks by running many logins from a single                         
# host                                                                                           
DisplaysPerHost=1                                                                                
# The port.  177 is the standard port so better keep it that way                                 
Port=177                                                                                         
# Willing script, none is shipped and by default we'll send                                      
# hostname system id.  But if you supply something here, the                                     
# output of this script will be sent as status of this host so that                              
# the chooser can display it.  You could for example send load,                                  
# or mail details for some user, or some such.                                                   
Willing=/etc/X11/gdm/Xwilling                                                                    
                                                                                                 
[gui]                                                                                            
# The 'theme'.  By default we're using the default gtk theme                                     
# Of course assuming that gtk got installed in the same prefix,                                  
# if not change this.                                                                            
GtkRC=/usr/share/themes/Default/gtk/gtkrc                                                        
# Maximum size of an icon, larger icons are scaled down                                          
MaxIconWidth=128                                                                                 
MaxIconHeight=128                                                                                
                                                                                                 
[greeter]                                                                                        
# Greeter has a nice title bar that the user can move                                            
TitleBar=true                                                                                    
# Configuration is available from the system menu of the greeter                                 
ConfigAvailable=true                                                                             
# Face browser is enabled.  This only works currently for the                                    
# standard greeter as it is not yet enabled in the graphical greeter.                            
Browser=true                                                                                     
# The default picture in the browser                                                             
DefaultFace=/usr/share/mdk/faces/default.png                                                     
# These are things excluded from the face browser, not from logging in                           
Exclude=bin,daemon,adm,lp,sync,shutdown,halt,mail,news,uucp,operator,nobody,gdm,postgres,pvm,rpm 
# As an alternative to the above this is the minimum uid to show                                 
MinimalUID=500                                                                                   
# If user or user.png exists in this dir it will be used as his picture                          
GlobalFaceDir=/usr/share/faces/                                                                  
# Icon we use                                                                                    
Icon=/usr/share/pixmaps/gdm.png                                                                  
# File which contains the locale we show to the user.  Likely you want to use                    
# the one shipped with gdm and edit it.  It is not a standard locale.alias file,                 
# although gdm will be able to read a standard locale.alias file as well.                        
LocaleFile=/etc/X11/gdm/locale.alias                                                             
# Logo shown in the standard greeter                                                             
Logo=/usr/share/pixmaps/gdm-screen.png                                                           
# The standard greeter should shake if a user entered the wrong username or                      
# password.  Kind of cool looking                                                                
Quiver=true                                                                                      
# The system menu is shown in the greeter                                                        
SystemMenu=true                                                                                  
# Note to distributors, if you wish to have a different Welcome string                           
# and wish to have this translated you can have entries such as                                  
# Welcome[cs]=Vitejte na %n                                                                      
# Just make sure the string is in utf-8                                                          
Welcome=Welcome to %n                                                                            
# Don't allow user to move the standard greeter window.  Only makes sense                        
# if TitleBar is on                                                                              
LockPosition=false                                                                               
# Set a position rather then just centering the window.  If you enter                            
# negative values for the position it is taken as an offset from the                             
# right or bottom edge.                                                                          
SetPosition=false                                                                                
PositionX=0                                                                                      
PositionY=0                                                                                      
# Xinerama screen we use to display the greeter on.  Not for true                                
# multihead, currently only works for Xinerama.                                                  
XineramaScreen=0                                                                                 
# Background settings for the standard greeter:                                                  
# Type can be 0=None, 1=Image, 2=Color                                                           
BackgroundType=2                                                                                 
BackgroundImage=                                                                                 
BackgroundScaleToFit=true                                                                        
BackgroundColor=#21449c                                                                          
# XDMCP session should only get a color, this is the sanest setting since                        
# you don't want to take up too much bandwidth                                                   
BackgroundRemoteOnlyColor=true                                                                   
# Program to run to draw the background in the standard greeter.  Perhaps                        
# something like an xscreensaver hack or some such.                                              
BackgroundProgram=                                                                               
# if this is true then the background program is run always, otherwise                           
# it is only run when the BackgroundType is 0 (None)                                             
RunBackgroundProgramAlways=false                                                                 
# Show the chooser (you can choose a specific saved gnome session) session                       
ShowGnomeChooserSession=false                                                                    
# Show the Failsafe sessions.  These are much MUCH nicer (focus for xterm for                    
# example) and more failsafe then those supplied by scripts so distros should                    
# use this rather then just running an xterm from a script.                                      
ShowGnomeFailsafeSession=false                                                                   
ShowXtermFailsafeSession=false                                                                   
# Always use 24 hour clock no matter what the locale.                                            
Use24Clock=false                                                                                 
# Use circles in the password field.  Looks kind of cool actually                                
UseCirclesInEntry=false                                                                          
# These two keys are for the new greeter.  Circles is the standard                               
# shipped theme                                                                                  
GraphicalTheme=mdk                                                                               
GraphicalThemeDir=/usr/share/gdm/themes/                                                         
                                                                                                 
# The chooser is what's displayed when a user wants an indirect XDMCP                            
# session                                                                                        
[chooser]                                                                                        
# Default image for hosts                                                                        
DefaultHostImg=/usr/share/pixmaps/nohost.png                                                     
# Directory with host images, they are named by the hosts: host or host.png                      
HostImageDir=/usr/share/hosts/                                                                   
# Time we scan for hosts (well only the time we tell the user we are                             
# scanning actually)                                                                             
ScanTime=3                                                                                       
# A comma separated lists of hosts to automatically add (if they answer to                       
# a query of course).  You can use this to reach hosts that broadcast cannot                     
# reach.                                                                                         
Hosts=                                                                                           
# Broadcast a query to get all hosts on the current network that answer                          
Broadcast=true                                                                                   
                                                                                                 
[debug]                                                                                          
# This will enable debugging into the syslog, usually not neccessary                             
# and it creates a LOT of spew of random stuff to the syslog.  However it                        
# can be useful in determining when something is going very wrong.                               
Enable=false                                                                                     
                                                                                                 
[servers]                                                                                        
# These are the standard servers.  You can add as many you want here                             
# and they will always be started.  Each line must start with a unique                           
# number and that will be the display number of that server.  Usually just                       
# the 0 server is used.                                                                          
0=Standard                                                                                       
#1=Standard                                                                                      
# Note the VTAllocation and FirstVT keys on Linux.  Don't add any vt<number>                     
# arguments if VTAllocation is on, and set FirstVT to be the first vt                            
# available that your gettys don't grab (gettys are usually dumb and grab                        
# even a vt that has already been taken).  Using 7 will work pretty much for                     
# all Linux distributions.  VTAllocation is not currently implemented on                         
# anything but Linux since I don't own any non-Linux systems.  Feel free to                      
# send patches.  X servers will just not get any extra arguments then.                           
#                                                                                                
#Note: If you want to run an X terminal you could add an X server such as this                   
#0=Terminal -query serverhostname                                                                
# or for a chooser (optionally serverhostname could be localhost)                                
#0=Terminal -indirect serverhostname                                                             
                                                                                                 
# Definition of the standard X server.                                                           
[server-Standard]                                                                                
name=Standard server                                                                             
command=/usr/X11R6/bin/X0 :0 -deferglyphs 16 vt7                                                 
                                                                                                 
flexible=true                                                                                    
                                                                                                 
# To use this server type you should add -query host or -indirect host                           
# to the command line                                                                            
[server-Terminal]                                                                                
name=Terminal server                                                                             
# Add -terminate to make things behave more nicely                                               
command=/usr/X11R6/bin/X -terminate                                                              
# Make this not appear in the flexible servers (we need extra params                             
# anyway, and terminate would be bad for xdmcp)                                                  
flexible=false                                                                                   
# Not local, we do not handle the logins for this X server                                       
handled=false                                                                                    
                                                                                                 

/etc/X11/gdm/gdm.conf.1
# GDM Configuration file.  You can use gdmsetup program to graphically                           
# edit this, or you can optionally just edit this file by hand.  Note that                       
# gdmsetup does not tweak every option here, just the ones most users                            
# would care about.  Rest is for special setups and distro specific                              
# tweaks.  If you edit this file, you should send the HUP or USR1 signal to                      
# the daemon so that it restarts: (Assuming you have not changed PidFile)                        
#   kill -USR1 `cat /var/run/gdm.pid`                                                            
# (HUP will make gdm restart immediately while USR1 will make gdm not kill                       
# existing sessions and will only restart gdm after all users log out)                           
#                                                                                                
# You can also use the gdm-restart and gdm-safe-restart scripts which just                       
# do the above for you.                                                                          
#                                                                                                
# Have fun! - George                                                                             
                                                                                                 
[daemon]                                                                                         
# Automatic login, if true the first local screen will automatically logged                      
# in as user as set with AutomaticLogin key.                                                     
AutomaticLoginEnable=false                                                                       
AutomaticLogin=                                                                                  
# Timed login, useful for kiosks.  Log in a certain user after a certain                         
# amount of time                                                                                 
TimedLoginEnable=false                                                                           
TimedLogin=                                                                                      
TimedLoginDelay=30                                                                               
# A comma separated list of users that will be logged in without having                          
# to authenticate on local screens (not over xdmcp).  Note that 'root'                           
# is ignored and will always have to authenticate.                                               
LocalNoPasswordUsers=                                                                            
# If you are having trouble with using a single server for a long time and                       
# want gdm to kill/restart the server, turn this on                                              
AlwaysRestartServer=false                                                                        
# The gdm configuration program that is run from the login screen, you should                    
# probably leave this alone                                                                      
Configurator=/usr/sbin/gdmsetup --disable-sound --disable-crash-dialog                           
GnomeDefaultSession=/usr/share/gnome/default.session                                             
# The chooser program.  Must output the chosen host on stdout, probably you                      
# should leave this alone                                                                        
Chooser=/usr/bin/gdmchooser                                                                      
# Default path to set.  The profile scripts will likely override this                            
DefaultPath=/bin:/usr/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/local/bin:/usr/bin                    
# Default path for root.  The profile scripts will likely override this                          
RootPath=/sbin:/usr/sbin:/bin:/usr/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/local/bin:/usr/bin       
DisplayInitDir=/etc/X11/gdm/Init                                                                 
# Greeter for local (non-xdmcp) logins.  Change gdmlogin to gdmgreeter to                        
# get the new graphical greeter.                                                                 
Greeter=/usr/bin/gdmgreeter                                                                      
# Greeter for xdmcp logins, usually you want a less graphically intensive                        
# greeter here so it's better to leave this with gdmlogin                                        
RemoteGreeter=/usr/bin/gdmlogin                                                                  
# User and group that gdm should run as.  Probably should be gdm and gdm and                     
# you should create these user and group.  Anyone found running this as                          
# someone too privilaged will get a kick in the ass.  This should have                           
# access to only the gdm directories and files.                                                  
User=gdm                                                                                         
Group=gdm                                                                                        
# To try to kill all clients started at greeter time or in the Init script.                      
# doesn't always work, only if those clients have a window of their own                          
KillInitClients=true                                                                             
LogDir=/var/lib/gdm                                                                              
# You should probably never change this value unless you have a weird setup                      
PidFile=/var/run/gdm.pid                                                                         
PostSessionScriptDir=/etc/X11/gdm/PostSession/                                                   
PreSessionScriptDir=/etc/X11/gdm/PreSession/                                                     
# Distributions:  If you have some script that runs an X server in say                           
# VGA mode, allowing a login, could you please send it to me?                                    
FailsafeXServer=                                                                                 
# if X keeps crashing on us we run this script.  The default one does a bunch                    
# of cool stuff to figure out what to tell the user and such and can                             
# run an X configuration program.                                                                
XKeepsCrashing=/etc/X11/gdm/XKeepsCrashing                                                       
# Reboot, Halt and suspend commands, you can add different commands                              
# separated by a semicolon and gdm will use the first one it can find                            
RebootCommand=/sbin/shutdown -r now;/usr/sbin/shutdown -r now                                    
HaltCommand=/usr/bin/poweroff;/sbin/poweroff;/sbin/shutdown -h now;/usr/sbin/shutdown -h now     
SuspendCommand=                                                                                  
# Probably should not touch the below this is the standard setup                                 
ServAuthDir=/var/lib/gdm                                                                         
SessionDir=/etc/X11/gdm/Sessions/                                                                
# Better leave this blank and HOME will be used.  You can use syntax ~/ below                    
# to indicate home directory of the user                                                         
UserAuthDir=                                                                                     
# Fallback if home directory not writable                                                        
UserAuthFBDir=/tmp                                                                               
UserAuthFile=.Xauthority                                                                         
# The X server to use if we can't figure out what else to run.                                   
StandardXServer=/usr/X11R6/bin/X0                                                                
# The maximum number of flexible X servers to run.                                               
FlexibleXServers=5                                                                               
# the X nest command                                                                             
Xnest=/usr/X11R6/bin/Xnest -name Xnest                                                           
# Automatic VT allocation.  Right now only works on Linux.  This way                             
# we force X to use specific vts.  turn VTAllocation to false if this                            
# is causing problems.                                                                           
FirstVT=7                                                                                        
VTAllocation=false                                                                               
                                                                                                 
[security]                                                                                       
# If any distributions ship with this one off, they should be shot                               
# this is only local, so it's only for say kiosk use, when you                                   
# want to minimize possibility of breakin                                                        
AllowRoot=true                                                                                   
# If you want to be paranoid, turn this one off                                                  
AllowRemoteRoot=true                                                                             
# This will allow remote timed login                                                             
AllowRemoteAutoLogin=false                                                                       
# 0 is the most anal, 1 allows group write permissions, 2 allows all write permissions           
RelaxPermissions=0                                                                               
RetryDelay=3                                                                                     
# Maximum size of a file we wish to read.  This makes it hard for a user to DoS us               
# by using a large file.                                                                         
UserMaxFile=65536                                                                                
# Maximum size of the session file.  This is larger because it matters less as we                
# never keep it all in memory.  Just has an upper limit so that we don't go into too             
# long of a loop                                                                                 
SessionMaxFile=524388                                                                            
                                                                                                 
# XDMCP is the protocol that allows remote login.  If you want to log into                       
# gdm remotely (I'd never turn this on on open network, use ssh for such                         
# remote usage that).  You can then run X with -query <thishost> to log in,                      
# or -indirect <thishost> to run a chooser.  Look for the 'Terminal' server                      
# type at the bottom of this config file.                                                        
[xdmcp]                                                                                          
# Distributions: Ship with this off.  It is never a safe thing to leave                          
# out on the net.  Alternatively you can set up /etc/hosts.allow and                             
# /etc/hosts.deny to only allow say local access.                                                
Enable=false                                                                                     
# Honour indirect queries, we run a chooser for these, and then redirect                         
# the user to the chosen host.  Otherwise we just log the user in locally.                       
HonorIndirect=true                                                                               
# Maximum pending requests                                                                       
MaxPending=4                                                                                     
MaxPendingIndirect=4                                                                             
# Maximum open XDMCP sessions at any point in time                                               
MaxSessions=16                                                                                   
# Maximum wait times                                                                             
MaxWait=15                                                                                       
MaxWaitIndirect=15                                                                               
# How many times can a person log in from a single host.  Usually better to                      
# keep at 1 to fend off DoS attacks by running many logins from a single                         
# host                                                                                           
DisplaysPerHost=1                                                                                
# The port.  177 is the standard port so better keep it that way                                 
Port=177                                                                                         
# Willing script, none is shipped and by default we'll send                                      
# hostname system id.  But if you supply something here, the                                     
# output of this script will be sent as status of this host so that                              
# the chooser can display it.  You could for example send load,                                  
# or mail details for some user, or some such.                                                   
Willing=/etc/X11/gdm/Xwilling                                                                    
                                                                                                 
[gui]                                                                                            
# The 'theme'.  By default we're using the default gtk theme                                     
# Of course assuming that gtk got installed in the same prefix,                                  
# if not change this.                                                                            
GtkRC=/usr/share/themes/Default/gtk/gtkrc                                                        
# Maximum size of an icon, larger icons are scaled down                                          
MaxIconWidth=128                                                                                 
MaxIconHeight=128                                                                                
                                                                                                 
[greeter]                                                                                        
# Greeter has a nice title bar that the user can move                                            
TitleBar=true                                                                                    
# Configuration is available from the system menu of the greeter                                 
ConfigAvailable=true                                                                             
# Face browser is enabled.  This only works currently for the                                    
# standard greeter as it is not yet enabled in the graphical greeter.                            
Browser=true                                                                                     
# The default picture in the browser                                                             
DefaultFace=/usr/share/mdk/faces/default.png                                                     
# These are things excluded from the face browser, not from logging in                           
Exclude=bin,daemon,adm,lp,sync,shutdown,halt,mail,news,uucp,operator,nobody,gdm,postgres,pvm,rpm 
# As an alternative to the above this is the minimum uid to show                                 
MinimalUID=500                                                                                   
# If user or user.png exists in this dir it will be used as his picture                          
GlobalFaceDir=/usr/share/faces/                                                                  
# Icon we use                                                                                    
Icon=/usr/share/pixmaps/gdm.png                                                                  
# File which contains the locale we show to the user.  Likely you want to use                    
# the one shipped with gdm and edit it.  It is not a standard locale.alias file,                 
# although gdm will be able to read a standard locale.alias file as well.                        
LocaleFile=/etc/X11/gdm/locale.alias                                                             
# Logo shown in the standard greeter                                                             
Logo=/usr/share/pixmaps/gdm-screen.png                                                           
# The standard greeter should shake if a user entered the wrong username or                      
# password.  Kind of cool looking                                                                
Quiver=true                                                                                      
# The system menu is shown in the greeter                                                        
SystemMenu=true                                                                                  
# Note to distributors, if you wish to have a different Welcome string                           
# and wish to have this translated you can have entries such as                                  
# Welcome[cs]=Vitejte na %n                                                                      
# Just make sure the string is in utf-8                                                          
Welcome=Welcome to %n                                                                            
# Don't allow user to move the standard greeter window.  Only makes sense                        
# if TitleBar is on                                                                              
LockPosition=false                                                                               
# Set a position rather then just centering the window.  If you enter                            
# negative values for the position it is taken as an offset from the                             
# right or bottom edge.                                                                          
SetPosition=false                                                                                
PositionX=0                                                                                      
PositionY=0                                                                                      
# Xinerama screen we use to display the greeter on.  Not for true                                
# multihead, currently only works for Xinerama.                                                  
XineramaScreen=0                                                                                 
# Background settings for the standard greeter:                                                  
# Type can be 0=None, 1=Image, 2=Color                                                           
BackgroundType=2                                                                                 
BackgroundImage=                                                                                 
BackgroundScaleToFit=true                                                                        
BackgroundColor=#21449c                                                                          
# XDMCP session should only get a color, this is the sanest setting since                        
# you don't want to take up too much bandwidth                                                   
BackgroundRemoteOnlyColor=true                                                                   
# Program to run to draw the background in the standard greeter.  Perhaps                        
# something like an xscreensaver hack or some such.                                              
BackgroundProgram=                                                                               
# if this is true then the background program is run always, otherwise                           
# it is only run when the BackgroundType is 0 (None)                                             
RunBackgroundProgramAlways=false                                                                 
# Show the chooser (you can choose a specific saved gnome session) session                       
ShowGnomeChooserSession=false                                                                    
# Show the Failsafe sessions.  These are much MUCH nicer (focus for xterm for                    
# example) and more failsafe then those supplied by scripts so distros should                    
# use this rather then just running an xterm from a script.                                      
ShowGnomeFailsafeSession=false                                                                   
ShowXtermFailsafeSession=false                                                                   
# Always use 24 hour clock no matter what the locale.                                            
Use24Clock=false                                                                                 
# Use circles in the password field.  Looks kind of cool actually                                
UseCirclesInEntry=false                                                                          
# These two keys are for the new greeter.  Circles is the standard                               
# shipped theme                                                                                  
GraphicalTheme=mdk                                                                               
GraphicalThemeDir=/usr/share/gdm/themes/                                                         
                                                                                                 
# The chooser is what's displayed when a user wants an indirect XDMCP                            
# session                                                                                        
[chooser]                                                                                        
# Default image for hosts                                                                        
DefaultHostImg=/usr/share/pixmaps/nohost.png                                                     
# Directory with host images, they are named by the hosts: host or host.png                      
HostImageDir=/usr/share/hosts/                                                                   
# Time we scan for hosts (well only the time we tell the user we are                             
# scanning actually)                                                                             
ScanTime=3                                                                                       
# A comma separated lists of hosts to automatically add (if they answer to                       
# a query of course).  You can use this to reach hosts that broadcast cannot                     
# reach.                                                                                         
Hosts=                                                                                           
# Broadcast a query to get all hosts on the current network that answer                          
Broadcast=true                                                                                   
                                                                                                 
[debug]                                                                                          
# This will enable debugging into the syslog, usually not neccessary                             
# and it creates a LOT of spew of random stuff to the syslog.  However it                        
# can be useful in determining when something is going very wrong.                               
Enable=false                                                                                     
                                                                                                 
[servers]                                                                                        
# These are the standard servers.  You can add as many you want here                             
# and they will always be started.  Each line must start with a unique                           
# number and that will be the display number of that server.  Usually just                       
# the 0 server is used.                                                                          
0=Standard                                                                                       
1=2nd                                                                                            
                                                                                                 
# Note the VTAllocation and FirstVT keys on Linux.  Don't add any vt<number>                     
# arguments if VTAllocation is on, and set FirstVT to be the first vt                            
# available that your gettys don't grab (gettys are usually dumb and grab                        
# even a vt that has already been taken).  Using 7 will work pretty much for                     
# all Linux distributions.  VTAllocation is not currently implemented on                         
# anything but Linux since I don't own any non-Linux systems.  Feel free to                      
# send patches.  X servers will just not get any extra arguments then.                           
#                                                                                                
#Note: If you want to run an X terminal you could add an X server such as this                   
#0=Terminal -query serverhostname                                                                
# or for a chooser (optionally serverhostname could be localhost)                                
#0=Terminal -indirect serverhostname                                                             
                                                                                                 
# Definition of the standard X server.                                                           
[server-Standard]                                                                                
name=Standard server                                                                             
command=/usr/X11R6/bin/X0 :0 -deferglyphs 16 vt7                                                 
flexible=true                                                                                    
                                                                                                 
# Definition of the second X server.                                                             
[server-2nd]                                                                                     
name=2nd server                                                                                  
command=/usr/X11R6/bin/X1 :1 -xf86config /etc/X11/XF86Config-4.X1 -deferglyphs 16 vt17           
flexible=true                                                                                    
                                                                                                 
# To use this server type you should add -query host or -indirect host                           
# to the command line                                                                            
[server-Terminal]                                                                                
name=Terminal server                                                                             
# Add -terminate to make things behave more nicely                                               
command=/usr/X11R6/bin/X -terminate                                                              
# Make this not appear in the flexible servers (we need extra params                             
# anyway, and terminate would be bad for xdmcp)                                                  
flexible=false                                                                                   
# Not local, we do not handle the logins for this X server                                       
handled=false                                                                                    
                                                                                                 
-----------------------------------------------------------------------------

B.3. Configuration files for Input Agent

B.3.1. Keyboard configuration

/etc/hotplug/kbd.conf
#                                                                            
# keyboard configuretion                                                     
#                                                                            
# vt_name device_physicaly_location                                          
VT0     usb-00:10.1-1.1/input0                                               
VT1     isa0060/serio0/input0                                                
#VT2    usb-*.*-1/input0                                                     
-----------------------------------------------------------------------------

B.3.2. Mouse configuration

/etc/hotplug/mouse.conf
# mouse device configuration                                                 
#                                                                            
# sym_link device_physicaly_location                                         
mouse0br        usb-00:10.1-1.2/input0                                       
mouse2br        usb-00:10.1-2.7.*/input0                                     
mouse1br        usb-00:10.1-2.2/input0                                       
-----------------------------------------------------------------------------

B.3.3. Event device configuration

/etc/hotplug/event.conf
#                                                                            
# input event device config file                                             
#                                                                            
# symbolic_link device_physicaly_location                                    
#event0br       isa0060/serio0/*                                             
#event0br       isa0060/serio1/input0                                        
#event3br       usb-*.*-1.3/*                                                
-----------------------------------------------------------------------------

Appendix C. Scripts

C.1. hotplug: input.agent

/etc/hotplug/input.agent
#!/bin/sh                                                                                           
# Please place this file /etc/hotplug                                                               
#                                                                                                   
# input-specific hotplug policy agent.                                                              
#                                                                                                   
# Kernel Input params are:                                                                          
#                                                                                                   
#       ACTION=add                                                                                  
#       PHYS=pysical location of device                                                             
#       NAME=Name of the device                                                                     
#                                                                                                   
# HISTORY:                                                                                          
#       15-JUN-2003     removed paste                                                               
#       07-MAY-2003     remake by Aivils Stoss                                                      
#                       /proc manipulation added                                                    
#                       parse kbd.conf event.conf mouse.conf.                                       
#                       create necessary symbolic links                                             
#       28-SEP-2002     Initial version from Andreas Schuldei                                       
#                        andreas (at) schuldei.org                                                  
#                                                                                                   
cd /etc/hotplug                                                                                     
. hotplug.functions                                                                                 
DEBUG=yes export DEBUG                                                                              
                                                                                                    
KBD_CONFIG="./kbd.conf"                                                                             
EVENT_CONFIG="./event.conf"                                                                         
MOUSE_CONFIG="./mouse.conf"                                                                         
                                                                                                    
setup_kbd ()                                                                                        
{                                                                                                   
    while read VT_NUM PHYS_PATTERN NAME_PATTERN                                                     
    do                                                                                              
        if [ `echo "$VT_NUM" | grep "^#"` ]; then                                                   
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            VT=`echo "$VT_NUM" | sed 's/VT//' | awk '{printf "%02d", $0}'`                          
            if [ -d /proc/bus/console/$VT ]; then                                                   
                echo "$PHYS" > "/proc/bus/console/$VT/keyboard"                                     
                debug_mesg "Input device $NAME on $PHYS mapping as secondary to VT$VT"              
                return;                                                                             
            else                                                                                    
                debug_mesg "Trying to configure keyboard for VT$VT , but not enough VT's available" 
            fi                                                                                      
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting VT"                                                                
}                                                                                                   
                                                                                                    
setup_event ()                                                                                      
{                                                                                                   
    while read SYM_LINK PHYS_PATTERN NAME_PATTERN                                                   
    do                                                                                              
        if [ `echo "$SYM_LINK" | grep "^#"` ]; then                                                 
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            case $ACTION in                                                                         
            add)                                                                                    
                cd /dev/input                                                                       
                rm -f $SYM_LINK                                                                     
                ln -s $DEV_EVENT $SYM_LINK                                                          
                debug_mesg "Input event device $NAME on $PHYS linked to $SYM_LINK"                  
            ;;                                                                                      
            remove)                                                                                 
                rm -f /dev/input/$SYM_LINK                                                          
                debug_mesg "Input event device link $SYM_LINK removed"                              
            ;;                                                                                      
            esac                                                                                    
            return;                                                                                 
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting event device"                                                      
}                                                                                                   
                                                                                                    
setup_mouse ()                                                                                      
{                                                                                                   
    while read SYM_LINK PHYS_PATTERN NAME_PATTERN                                                   
    do                                                                                              
        if [ `echo "$SYM_LINK" | grep "^#"` ]; then                                                 
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            case $ACTION in                                                                         
            add)                                                                                    
                cd /dev/input                                                                       
                rm -f $SYM_LINK                                                                     
                ln -s $DEV_MOUSE $SYM_LINK                                                          
                debug_mesg "Input mouse device $NAME on $PHYS linked to $SYM_LINK"                  
            ;;                                                                                      
            remove)                                                                                 
                rm -f /dev/input/$SYM_LINK                                                          
                debug_mesg "Input mouse device link $SYM_LINK removed"                              
            ;;                                                                                      
            esac                                                                                    
            return;                                                                                 
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting mouse device"                                                      
}                                                                                                   
                                                                                                    
if [ "$ACTION" = "" ]; then                                                                         
    mesg Bad input agent invocation                                                                 
    exit 1                                                                                          
fi                                                                                                  
                                                                                                    
DEV_HANDLERS=`grep -E 'Phys|Handlers' /proc/bus/input/devices | \                                   
    awk '{ if(count == 0) { printf("%s\t",$0); count++; } else { print $0; count=0; } }' | \        
    grep $PHYS | awk -F\t '{print $2}' | sed 's/^.*=//'`                                            
                                                                                                    
# older grep do not support -o :-(                                                                  
#DEV_EVENT=`echo $MATCHED | grep -oE event[0-9]+`                                                   
#DEV_MOUSE=`echo $MATCHED | grep -oE mouse[0-9]+`                                                   
#DEV_KBD=`echo $MATCHED | grep -o kbd`                                                              
                                                                                                    
DEV_EVENT=`echo $DEV_HANDLERS | \                                                                   
            awk -F" " '{for(n=1;$n;n=n+1) if($n ~ /event/) print $n}'`                              
DEV_MOUSE=`echo $DEV_HANDLERS | \                                                                   
            awk -F" " '{for(n=1;$n;n=n+1) if($n ~ /mouse/) print $n}'`                              
DEV_KBD=`echo $DEV_HANDLERS | \                                                                     
            awk -F" " '{for(n=1;$n;n=n+1) if($n ~ /kbd/) print $n}'`                                
                                                                                                    
#                                                                                                   
# What to do with this input device event?                                                          
#                                                                                                   
case "$ACTION" in                                                                                   
                                                                                                    
add)                                                                                                
    if [ -n "$DEV_KBD" ]; then                                                                      
        setup_kbd < $KBD_CONFIG                                                                     
    fi                                                                                              
    if [ -n "$DEV_EVENT" ]; then                                                                    
        setup_event < $EVENT_CONFIG                                                                 
    fi                                                                                              
    if [ -n "$DEV_MOUSE" ]; then                                                                    
        setup_mouse < $MOUSE_CONFIG                                                                 
    fi                                                                                              
    ;;                                                                                              
remove)                                                                                             
    #setup_event < $EVENT_CONFIG                                                                    
    #setup_mouse < $MOUSE_CONFIG                                                                    
    ;;                                                                                              
*)                                                                                                  
    debug_mesg "Input '$ACTION' event not supported"                                                
    return 1                                                                                        
    ;;                                                                                              
                                                                                                    
esac                                                                                                
                                                                                                    
-----------------------------------------------------------------------------

C.2. hotplug: input.rc

/etc/hotplug/input.rc
#!/bin/bash                                                                     
#                                                                               
# input.rc      This loads handlers for those input devices                     
#               that have drivers compiled in kernel                            
#               Currently stopping is not supported                             
#                                                                               
# Best invoked via /etc/init.d/hotplug or equivalent, with                      
# writable /tmp, /usr mounted, and syslogging active.                           
#                                                                               
                                                                                
                                                                                
PATH=/sbin:/bin:/usr/sbin:/usr/bin                                              
PROCDIR=/proc/bus/input                                                         
                                                                                
# source function library                                                       
if [ -f /etc/init.d/functions ]; then                                           
        . /etc/init.d/functions                                                 
elif [ -f /etc/rc.d/init.d/functions ]; then                                    
        . /etc/rc.d/init.d/functions                                            
fi                                                                              
                                                                                
if [ -f /etc/hotplug/hotplug.functions ]; then                                  
        . /etc/hotplug/hotplug.functions                                        
fi                                                                              
                                                                                
input_reset_state () {                                                          
                                                                                
    PRODUCT=                                                                    
    NAME=                                                                       
    PHYS=                                                                       
    EV=                                                                         
    KEY=                                                                        
    REL=                                                                        
    ABS=                                                                        
    MSC=                                                                        
    LED=                                                                        
    SND=                                                                        
    FF=                                                                         
                                                                                
}                                                                               
                                                                                
#                                                                               
# "COLD PLUG" ... load input handlers for compile-in input drivers loaded       
# before the OS could really handle hotplug, perhaps because /sbin or           
# $HOTPLUG_DIR wasn't available or /tmp wasn't writable.  When/if the           
# /sbin/hotplug program is invoked then, hotplug event notifications            
# get dropped.  To make up for such "cold boot" errors, we synthesize           
# all the hotplug events we expect to have seen already.  They can be           
# out of order, and some might be duplicates.                                   
#                                                                               
input_boot_events ()                                                            
{                                                                               
    if [ ! -r $PROCDIR/devices ]; then                                          
            echo $"** can't synthesize input events - $PROCDIR/devices missing" 
            return                                                              
    fi                                                                          
                                                                                
    ACTION=add                                                                  
    export ACTION                                                               
                                                                                
    export PRODUCT NAME PHYS EV KEY REL ABS MSC LED SND FF                      
    input_reset_state                                                           
                                                                                
    declare line                                                                
                                                                                
    #                                                                           
    # the following reads from /proc/bus/input/devices. It is inherently        
    # racy (esp. as this file may be changed by input.agent invocation)         
    # but so far input devices do not appear in sysfs                           
    #                                                                           
    while read line; do                                                         
        case "$line" in                                                         
            I:* )       # product ID                                            
                eval "${line#I: }"                                              
                PRODUCT=$Bus/$Vendor/$Product/$Version                          
            ;;                                                                  
            N:* )       # name                                                  
                eval "${line#N: }"                                              
                NAME="$Name"                                                    
            ;;                                                                  
            P:* )       # Physical                                              
                eval "${line#P: }"                                              
                PHYS=$Phys                                                      
        ;;                                                                      
            B:* )       # Controls supported                                    
                line="${line#B: }"                                              
                eval "${line%%=*}=\"${line#*=}\""                               
            ;;                                                                  
            "" )        # End of block                                          
                debug_mesg "Invoking input.agent"                               
                debug_mesg "PRODUCT=$PRODUCT"                                   
                debug_mesg "NAME=$NAME"                                         
                debug_mesg "PHYS=$PHYS"                                         
                debug_mesg "EV=$EV"                                             
                debug_mesg "KEY=$KEY"                                           
                debug_mesg "REL=$REL"                                           
                debug_mesg "ABS=$ABS"                                           
                debug_mesg "MSC=$MSC"                                           
                debug_mesg "LED=$LED"                                           
                debug_mesg "SND=$SND"                                           
                debug_mesg "FF=$FF"                                             
                /etc/hotplug/input.agent < /dev/null                            
                input_reset_state                                               
            ;;                                                                  
        esac                                                                    
    done < $PROCDIR/devices                                                     
}                                                                               
                                                                                
                                                                                
# See how we were called.                                                       
case "$1" in                                                                    
  start)                                                                        
        input_boot_events                                                       
        ;;                                                                      
  stop)                                                                         
        : not supported currently                                               
        ;;                                                                      
  status)                                                                       
        echo $"INPUT status for kernel: " `uname -srm`                          
        echo ''                                                                 
                                                                                
        echo "INPUT devices:"                                                   
        if [ -r $PROCDIR/devices ]; then                                        
            grep "^[INHP]:" $PROCDIR/devices                                    
        else                                                                    
            echo "$PROCDIR/devices not available"                               
        fi                                                                      
        echo ''                                                                 
                                                                                
        echo "INPUT handlers:"                                                  
        if [ -r $PROCDIR/handlers ]; then                                       
            cat $PROCDIR/handlers                                               
        else                                                                    
            echo "$PROCDIR/handlers not available"                              
        fi                                                                      
                                                                                
        echo ''                                                                 
                                                                                
        ;;                                                                      
  restart)                                                                      
        # always invoke by absolute path, else PATH=$PATH:                      
        $0 stop && $0 start                                                     
        ;;                                                                      
  *)                                                                            
        echo $"Usage: $0 {start|stop|status|restart}"                           
        exit 1                                                                  
esac                                                                            
                                                                                
                                                                                
-----------------------------------------------------------------------------

C.3. hotplug & XFree supporting event devices: input.agent

/etc/hotplug/input.agent
#!/bin/bash                                                                                                                                 
                                                                                                                                            
cd /etc/hotplug                                                                                                                             
. hotplug.functions                                                                                                                         
#DEBUG=yes export DEBUG                                                                                                                     
                                                                                                                                            
export ARG_SEP='\002'                                                                                                                       
export VAL_SEP='\003'                                                                                                                       
                                                                                                                                            
for dev in `ls /tmp/.X11-unix/ | grep evdev`; do {                                                                                          
    export dev="/tmp/.X11-unix/${dev}"                                                                                                      
    /bin/sh -c 'echo -e "2.1${ARG_SEP}NAME${VAL_SEP}${NAME}${ARG_SEP}PHYS${VAL_SEP}${PHYS}${ARG_SEP}ACTION${VAL_SEP}${ACTION}" >> ${dev}' & 
}; done                                                                                                                                     
-----------------------------------------------------------------------------

C.4. Wrapper for starting X using Nvidia libGL.so

#!/bin/bash                                                                  
#########################################################                    
### /usr/X11R6/bin/XNV                                ###                    
### script to start XFree with different LIBRARY_PATH ###                    
### in order to use Nvidia GL libraries and           ###                    
### XFree GL libraries at the same time               ###                    
#########################################################                    
                                                                             
export LD_LIBRARY_PATH=/usr/X11R6/libNV                                      
exec /usr/X11R6/bin/X0 $*                                                    
                                                                             
-----------------------------------------------------------------------------

C.5. For installing Nvidia drivers for parallel use with DRI

#!/bin/bash                                                                                      
########################################################                                         
### /usr/sbin/ruby_NVinstaller                       ###                                         
### for usage call it with -h or --help parameter    ###                                         
########################################################                                         
                                                                                                 
if [[ -z $1 ]] || [ "$1" == "-h" ] || [ "$1" == "--help" ] ;then                                 
echo                                                                                             
echo "Usage :"                                                                                   
echo "$0 full path to Nvidia installer"                                                          
echo "eg. $0 /root/NVIDIA-Linux-x86-1.0-4349.run"                                                
exit 1                                                                                           
fi                                                                                               
                                                                                                 
if [[ -z $OPENWINHOME ]];then                                                                    
echo                                                                                             
echo "OPENWINHOME not defined!!!"                                                                
echo "Please set the environment variable OPENWINHOME"                                           
echo "pointing to your XFree prefix eg. /usr/X11R6"                                              
echo "for bash shell :"                                                                          
echo "export OPENWINHOME=/usr/X11R6"                                                             
exit 1                                                                                           
fi                                                                                               
                                                                                                 
cd $OPENWINHOME                                                                                  
echo                                                                                             
echo "backup file for XFree's GL libraries "                                                     
echo "is $OPENWINHOME/libGL-backup.tar"                                                          
if [ -x libGL-backup.tar ]; then                                                                 
        echo "old backup exist, deleting" && rm libGL-backup.tar                                 
fi                                                                                               
echo                                                                                             
find lib -name "libGL.*" -o -name "libGLcore*" \                                                 
        -o -name "libglx.*" | xargs tar  rpf   libGL-backup.tar \                                
        && echo "backup finished"                                                                
echo                                                                                             
echo "now running Nvidia installer"                                                              
echo "`which $1` --no-opengl-headers --xfree86-prefix=/usr/X11R6NV --opengl-prefix=/usr/X11R6NV" 
echo                                                                                             
`which $1` --no-opengl-headers --xfree86-prefix=/usr/X11R6NV --opengl-prefix=/usr/X11R6NV        
RETVAL=$?                                                                                        
if [ $RETVAL -eq 0 ]; then                                                                       
                                                                                                 
echo                                                                                             
echo "Nvidia installer finished,"                                                                
echo "now coping files to /usr/X11R6/libNV/"                                                     
echo                                                                                             
cd /usr/X11R6NV/lib &&  tar c * | tar xvC /usr/X11R6/libNV/                                      
echo                                                                                             
echo "restoring backuped GL libraries"                                                           
echo                                                                                             
cd $OPENWINHOME                                                                                  
tar xvfp libGL-backup.tar && ldconfig && echo "GL libraries restored" && rm libGL-backup.tar     
fi                                                                                               
                                                                                                 
if [ $RETVAL -ne 0 ]; then                                                                       
        echo                                                                                     
        echo "installer aborted, not restoring backup"                                           
        echo "deleting backup files" &&  rm libGL-backup.tar                                     
fi                                                                                               
                                                                                                 
echo                                                                                             
echo "script finished"                                                                           
                                                                                                 
-----------------------------------------------------------------------------

Appendix D. Experimental Backstreet Ruby configuration Script/ Service

D.1. README.ruby_init explains how to configure and use the service.

well,                                                                                           
have to be written :-)                                                                          
                                                                                                
You'll need to install the following scripts  :                                                 
(and don't forget to make them executable :-) with chmod a+x [filename] )                       
/etc/hotplug/input.agent                                                                        
/etc/hotplug/input.rc                                                                           
/etc/init.d/ruby_init                                                                           
                                                                                                
and the configuration file:                                                                     
/etc/sysconfig/ruby.conf                                                                        
                                                                                                
edit the configuration file to adjust it to your system configuration                           
                                                                                                
start the service and check if everything is done as requested and configured                   
/etc/init.d/ruby_init start                                                                     
                                                                                                
if everything is OK activate the service by running "chkconfig --add ruby_init" .               
                                                                                                
"chkconfig --list ruby_init" will tell you in which runlevels the service is active             
                                                                                                
root@svetljo SRPMS]# chkconfig --list ruby_init                                                 
ruby_init       0:off   1:off   2:on    3:on    4:on    5:on    6:off                           
                                                                                                
you can deactivate it by running "chkconfig --del ruby_init"                                    
                                                                                                
The input configuration uses the same syntax                                                    
as kbd.conf, mouse.conf, event.conf as explained                                                
in the section about hotplug with input agent.                                                  
                                                                                                
The other configurable options are:                                                             
                                                                                                
HACK_VIDEO_ENABLE=no                                                                            
                                                                                                
If set to "yes", turns on at boot the hackvideo feature of the Backstreet Ruby kernel.          
In case XFree PrefBusID is used set to "no"                                                     
                                                                                                
HOTPLUG_RC_input=yes                                                                            
                                                                                                
If set to "yes", runs /etc/hotplug/input.rc to configure input devices which were activated     
by the kernel before hotplug was available (drivers statically linked in the kernel).           
Generaly needed by all systems unless you have all input drivers configured as loadable modules 
and load the drivers after hotplug is accessible to the kernel.                                 
                                                                                                
AUTO_DM=no                                                                                      
AUTO_XFree=no                                                                                   
                                                                                                
No description yet. Or may be ...                                                               
enables/disables the features explained in sections                                             
"7.3. 1st X server configuration file" and "7.4. Number X servers started by Display managers"  
you don't need to modify your init scripts if you use the ruby_init service and enable them     
in ruby.conf.                                                                                   
                                                                                                
LOAD_MODULES=yes                                                                                
                                                                                                
if set to "yes" loads certain input device drivers in case a ruby kernel is running.            
                                                                                                
#                                                                                               
# input modules configuration                                                                   
#                                                                                               
# module arguments                                                                              
                                                                                                
The list of modules which should be loaded in case ruby kernel is running and                   
LOAD_MODULES is set to "yes".                                                                   
In the example file are listed all important input drivers (keyboards & mice).                  
If you have some of them compiled in the kernel, you may disable the loading                    
of the corresponding drivers by commenting them out.                                            
                                                                                                
the ext-status argument can give you detailed information about the current                     
configuration, and valuable information in case you are in trouble.                             
-----------------------------------------------------------------------------

D.2. The global configuration file /etc/sysconfig/ruby.conf

In /etc/sysconfig/ruby.conf are stored all configuration options for the
Input subsystem of a Backstreet ruby kernel and wether certain actions/
services should be run when such kernel is used.
# /etc/sysconfig/ruby.conf                                                   
# This file contains defaults for bruby_init                                 
                                                                             
#                                                                            
# HACK_VIDEO_ENABLE controls wether the ruby kernel shoukd                   
# ignore certain XFree commands.                                             
#                                                                            
# Set to yes in case you are not running the XFree-PrefBusID                 
# but XFree from your distribution                                           
#                                                                            
                                                                             
HACK_VIDEO_ENABLE=yes                                                        
                                                                             
# HOTPLUG_RC_input controls whether the input subsystem is started by        
# hotplug rc script ("cold plugging")                                        
#                                                                            
                                                                             
HOTPLUG_RC_input=yes                                                         
                                                                             
#                                                                            
# AUTO_DM controls wether the display manager configuration files            
# is adjusted upon the boot argument dumbcon=[number]                        
#                                                                            
# AUTO_XFree controls wether the XFree configuration file is                 
# adjusted upon XFree=[string] argument.                                     
# For Mandrake users this always activated in /etc/rc.d/rc.sysinit           
# and can not be disabled.                                                   
#                                                                            
                                                                             
AUTO_DM=no                                                                   
AUTO_XFree=no                                                                
                                                                             
#                                                                            
# LOAD_MODULES controls wether the additional modules listed below           
# should be loaded when a ruby kernel is running.                            
                                                                             
LOAD_MODULES=yes                                                             
                                                                             
#                                                                            
# input modules configuration                                                
#                                                                            
# module arguments                                                           
                                                                             
# needed for all mice                                                        
mousedev                                                                     
                                                                             
# for USB input                                                              
hid                                                                          
                                                                             
# for PS2 input                                                              
serio                                                                        
i8042                                                                        
atkbd                                                                        
psmouse                                                                      
                                                                             
#                                                                            
# keyboard devices configuration                                             
#                                                                            
# vt_name device_physicaly_location                                          
VT0     isa0060/serio0/input0                                                
VT1     usb-00:10.1-1.1/input0                                               
#VT0     isa0060/serio0/input0                                               
#VT2    usb-*.*-1/input0                                                     
                                                                             
#                                                                            
# multimedia keys configuration                                              
#                                                                            
# vt_name device_physicaly_location                                          
#VT1     usb-00:10.1-1.1/input1                                              
#VT2    usb-*.*-1/input0                                                     
                                                                             
#                                                                            
# mouse devices configuration                                                
#                                                                            
# sym_link device_physicaly_location                                         
mouse0br        isa0060/serio1/input0                                        
mouse1br        usb-00:10.1-1.2/input0                                       
#mouse2br        usb-00:10.1-2.7.*/input0                                    
#mouse1br        usb-00:10.1-2.2/input0                                      
                                                                             
#                                                                            
# event devices configuration                                                
#                                                                            
# sym_link device_physicaly_location                                         
#event0br        isa0060/serio1/input0                                       
#event1br        usb-00:10.1-1.1/input0                                      
#event2br        usb-00:10.1-1.1/input1                                      
#event3br        usb-00:10.1-1.2/input0                                      
                                                                             
#                                                                            
# end input device configuration                                             
#                                                                            
-----------------------------------------------------------------------------

D.3. The ruby_init service /etc/init.d/ruby_init

The /etc/init.d/ruby_init service configures/ activates most of the settings
specific to a Backstreet Ruby system.
#!/bin/sh                                                                                                                     
#                                                                                                                             
# ruby_init  This scripts configures cold-pluging for bruby, \                                                                
#            loads additional input modules, manages the XFree \                                                              
#            and display manager configuration files                                                                          
#                                                                                                                             
# chkconfig: 2345 02 98                                                                                                       
# description:  Configures the Bruby input subsystem and manages \                                                            
#               XFree and display manager configuration files.                                                                
# config: /etc/sysconfig/ruby.conf                                                                                            
#                                                                                                                             
# TODO                                                                                                                        
#       * handle commented out "PciOsConfig"                                                                                  
#       *? status/ ext-status                                                                                                 
#       - show config                                                                                                         
#       - check wether curr. configuration matches setup ?                                                                    
#       - make it work when hotplug files not installed ?                                                                     
#         ( currently it will just just inform that they are not installed                                                    
#         and exit )                                                                                                          
#                                                                                                                             
# $Id: XFree-Local-multi-user-HOWTO.xml,v 1.12 2003/11/11 14:52:42 gferg Exp $                                                
# - don't exit silently if hackvideo or modules loading is deactivated,                                                       
#   run the script to the end                                                                                                 
# $Id: XFree-Local-multi-user-HOWTO.xml,v 1.12 2003/11/11 14:52:42 gferg Exp $                                                
# - show keyboard status per VT ,use sed instead of head(head is in /usr)                                                     
# - *? status/ ext-status                                                                                                     
# - (mice & evdev links)?                                                                                                     
# $Id: XFree-Local-multi-user-HOWTO.xml,v 1.12 2003/11/11 14:52:42 gferg Exp $                                                
# - include hackvideo handling (long time wondering what was missing)                                                         
# $Id: XFree-Local-multi-user-HOWTO.xml,v 1.12 2003/11/11 14:52:42 gferg Exp $                                                
# - got it actually running                                                                                                   
# - use >& /dev/null to load variables from the config file                                                                   
#   (what a mess)                                                                                                             
# $Id: XFree-Local-multi-user-HOWTO.xml,v 1.12 2003/11/11 14:52:42 gferg Exp $                                                
# - initial release                                                                                                           
                                                                                                                              
PATH=/sbin:/bin:/usr/sbin:/usr/bin                                                                                            
                                                                                                                              
# source function library                                                                                                     
if [ -f /etc/init.d/functions ]; then                                                                                         
. /etc/init.d/functions                                                                                                       
elif [ -f /etc/rc.d/init.d/functions ]; then                                                                                  
        . /etc/rc.d/init.d/functions                                                                                          
fi                                                                                                                            
                                                                                                                              
# source defaults                                                                                                             
if [ -f /etc/sysconfig/ruby.conf ]; then                                                                                      
        #WTF, how to get rid of the ".... >& /dev/null"                                                                       
        . /etc/sysconfig/ruby.conf >& /dev/null                                                                               
        RUBY_CONF="/etc/sysconfig/ruby.conf"                                                                                  
else                                                                                                                          
        action "ruby_init: Configuration file missing" /bin/false                                                             
        exit 1                                                                                                                
fi                                                                                                                            
                                                                                                                              
function get_status() {                                                                                                       
                run_hackvideo status                                                                                          
#               prefbus_used ?                                                                                                
#               print dumb_con=?                                                                                              
                get_kbds        #and curr. active VTs                                                                         
}                                                                                                                             
                                                                                                                              
                                                                                                                              
function get_ext_status() {                                                                                                   
                run_input_rc status                                                                                           
                run_hackvideo status                                                                                          
#               prefbus_used ?                                                                                                
#               print dumb_con=?                                                                                              
                get_kbds        #and curr. active VTs                                                                         
                get_links mouse                                                                                               
                get_links event                                                                                               
}                                                                                                                             
                                                                                                                              
function run_start_restart() {                                                                                                
                load_modules                                                                                                  
                run_hackvideo start                                                                                           
                run_input_rc start                                                                                            
                run_auto_dm                                                                                                   
                run_auto_xfree                                                                                                
}                                                                                                                             
                                                                                                                              
function run_input_rc () {                                                                                                    
    for RC in /etc/hotplug/input.rc                                                                                           
    do                                                                                                                        
        eval "doit=\"\$HOTPLUG_RC_input\""                                                                                    
        if [ "$doit" != yes -a "$1" != status ]; then                                                                         
            continue                                                                                                          
        fi                                                                                                                    
        $RC $1                                                                                                                
        if [ "$1" != status ]; then                                                                                           
           action "bruby: configuring cold-pluged devices." $RC $1                                                            
        fi                                                                                                                    
    done                                                                                                                      
}                                                                                                                             
                                                                                                                              
                                                                                                                              
function run_hackvideo () {                                                                                                   
        eval "doit=\"\$HACK_VIDEO_ENABLE\""                                                                                   
        if [ "$doit" != yes ]; then                                                                                           
            if [ "$1" = status ]; then                                                                                        
                echo "XFree hackvideo not configured."                                                                        
            fi                                                                                                                
            return ;                                                                                                          
        fi                                                                                                                    
        if [ -f /proc/bus/pci/hackvideo ]; then                                                                               
           if [ -f /etc/X11/XF86Config-4 ]; then                                                                              
                   xf_file="/etc/X11/XF86Config-4"                                                                            
           elif [ -f /etc/X11/XF86Config ]; then                                                                              
                   xf_file="/etc/X11/XF86Config"                                                                              
           else                                                                                                               
                   action "bruby: XFree configuration file not found" /bin/false                                              
                   exit 1                                                                                                     
           fi                                                                                                                 
           #fi                                                                                                                
           eval "xf_hackvideo=`sed -n '/^#/d;s/^.*"PciOsConfig"[        ]//p' $xf_file | sed -e 's/[    ]//g'`"               
           if [ "$xf_hackvideo" = "1" ]; then                                                                                 
                case "$1" in                                                                                                  
                        start)                                                                                                
                                action "bruby: Enabling XFree hackvideo workaound." /bin/true                                 
                                /bin/echo "1" > /proc/bus/pci/hackvideo                                                       
                                ;;                                                                                            
                        stop)                                                                                                 
                                action "bruby: Disabling XFree hackvideo workaound."                                          
                                /bin/echo "0" > /proc/bus/pci/hackvideo                                                       
                                ;;                                                                                            
                        status)                                                                                               
                                eval "hack_enabled=`cat /proc/bus/pci/hackvideo`"                                             
                                if [ $hack_enabled = 1 ]; then                                                                
                                    echo "XFree hackvideo activated"                                                          
                                else                                                                                          
                                    echo "XFree hackvideo not activated,"                                                     
                                    echo "but enabled in configuration. "                                                     
                                fi                                                                                            
                                ;;                                                                                            
                        *)                                                                                                    
                                ;;                                                                                            
                esac                                                                                                          
           else                                                                                                               
                           action "bruby: Hackvideo not configured in XFree," /bin/false                                      
                           action "bruby: but enabled in $RUBY_CONF." /bin/false                                              
                                                                                                                              
           fi                                                                                                                 
        else                                                                                                                  
                                action "bruby: XFree hackvideo configured," /bin/false                                        
                                action "bruby: but kernel hackvideo support missing." /bin/false                              
        fi                                                                                                                    
                                                                                                                              
}                                                                                                                             
                                                                                                                              
function load_modules () {                                                                                                    
        eval "doit=\"\$LOAD_MODULES\""                                                                                        
        if [ "$doit" != yes -a "$1" != status ]; then                                                                         
            return ;                                                                                                          
        fi                                                                                                                    
        action "bruby: loading additional modules." /bin/true                                                                 
        cat $RUBY_CONF | sed -n "/input modules /,/config/p" | while read module args                                         
        do                                                                                                                    
          case "$module" in                                                                                                   
              \#*|"") continue ;;                                                                                             
          esac                                                                                                                
          initlog -s "Loading module: $module"                                                                                
          modprobe $module $args >/dev/null 2>&1                                                                              
        done                                                                                                                  
}                                                                                                                             
                                                                                                                              
function run_auto_xfree () {                                                                                                  
        eval "doit=\"\$AUTO_XFree\""                                                                                          
        if [ "$doit" != yes -a "$1" != status ]; then                                                                         
            return ;                                                                                                          
        fi                                                                                                                    
        # (pixel) a kind of profile for XF86Config                                                                            
        # if no XFree=XXX given on kernel command-line, restore XF86Config.standard                                           
        for i in XF86Config XF86Config-4; do                                                                                  
           if [ -L "/etc/X11/$i" ]; then                                                                                      
              XFree=`sed -n 's/.*XFree=\(\w*\).*/\1/p' /proc/cmdline`                                                         
              [ -n "$XFree" ] || XFree=standard                                                                               
              [ -r "/etc/X11/$i.$XFree" ] && ln -sf "$i.$XFree" "/etc/X11/$i"                                                 
          fi                                                                                                                  
        done                                                                                                                  
        action "bruby: configuring XFree." /bin/true                                                                          
}                                                                                                                             
                                                                                                                              
function run_auto_dm () {                                                                                                     
        eval "doit=\"\$AUTO_DM\""                                                                                             
        if [ "$doit" != yes -a "$1" != status ]; then                                                                         
            return ;                                                                                                          
        fi                                                                                                                    
        #                                                                                                                     
        #the same like XF86Config but for gdm.conf & Xservers                                                                 
        #                                                                                                                     
        for i in xdm/Xservers gdm/gdm.conf; do                                                                                
           if [ -L "/etc/X11/$i" ]; then                                                                                      
                DumbCon=`sed -n 's/.*dumbcon=\([0-9]*\).*/\1/p' /proc/cmdline`                                                
                [ -n "$DumbCon" ] || DumbCon=0                                                                                
                [ -r "/etc/X11/$i.$DumbCon" ] && ln -sf "/etc/X11/$i.$DumbCon" "/etc/X11/$i"                                  
           fi                                                                                                                 
        done                                                                                                                  
        action "bruby: configuring display manager." /bin/true                                                                
        echo "Setting up display managers for `expr $DumbCon + 1` Xservers"                                                   
}                                                                                                                             
                                                                                                                              
                                                                                                                              
function get_kbds() {                                                                                                         
        j=0                                                                                                                   
        for i in /proc/bus/console/*                                                                                          
           do                                                                                                                 
                echo                                                                                                          
                j=`expr $j + 1`                                                                                               
                phys=`cat $i/keyboard`                                                                                        
                if [ "$phys" = "" ];then                                                                                      
                   echo " VT-`basename $i` : keyboard not attached"                                                           
                else                                                                                                          
                   echo " VT-`basename $i` using :"                                                                           
#                  grep -n2 "$phys" /proc/bus/input/devices | sed -e '{/^B: /s;^B:.*;;};{s;^.*: ;;};' -e "/EV=/d"             
                   grep -B2 -A1 "$phys" /proc/bus/input/devices | sed 's;^.*: ;;'                                             
                fi                                                                                                            
           done                                                                                                               
        echo                                                                                                                  
        echo "Total of $j VT's avialable."                                                                                    
}                                                                                                                             
                                                                                                                              
function get_links() {                                                                                                        
                echo                                                                                                          
                for i in  /dev/input/$1*br                                                                                    
                    do                                                                                                        
                        real=`ls -l $i 2>/dev/null | sed "{s;^.*/dev/input/;;};{s; ->;;}" | cut -d " " -f 2`                  
                        if [ "$real" != "" ]; then                                                                            
                           echo "$i"                                                                                          
                           sed -e '/Name/,/Handl/s/.*: //;{/^B: /s;^B:.*;;};'  /proc/bus/input/devices | grep -B2 -A1 "$real" 
                        else                                                                                                  
                            exit 0                                                                                            
                        fi                                                                                                    
                    done                                                                                                      
}                                                                                                                             
                                                                                                                              
if [ -f /proc/bus/console  -o  -n tmp=`uname -r | sed -n 's:ruby::p'` ]; then                                                 
   if [ -x /etc/hotplug/input.rc  -a  -f /etc/hotplug/input.agent ]; then                                                     
                                                                                                                              
        case "$1" in                                                                                                          
                start|restart)                                                                                                
                        run_start_restart                                                                                     
                        ;;                                                                                                    
                status)                                                                                                       
                        get_status                                                                                            
                        touch /var/lock/subsys/ruby                                                                           
                        ;;                                                                                                    
                ext-status)                                                                                                   
                        get_ext_status                                                                                        
                        touch /var/lock/subsys/ruby                                                                           
                        ;;                                                                                                    
                stop)                                                                                                         
                        #run_hackvideo stop                                                                                   
                        run_input_rc stop                                                                                     
                        rm -f /var/lock/subsys/ruby                                                                           
                        ;;                                                                                                    
                force-reload)                                                                                                 
                        run_input_rc stop                                                                                     
                        run_input_rc start                                                                                    
                        touch /var/lock/subsys/ruby                                                                           
                        ;;                                                                                                    
                                                                                                                              
                *)                                                                                                            
                        gprintf "Usage: %s {start|stop|restart|status|ext-status|force_reload}\n" "$0"                        
                        exit 3                                                                                                
                        ;;                                                                                                    
        esac                                                                                                                  
                                                                                                                              
   else if [ -f /etc/hotplug/input.rc -a -f /etc/hotplug/input.agent ]; then                                                  
           action "Input: input.rc and input.agent installed, but not executable." /bin/false                                 
           action "Input: Please check the file permissions." /bin/false                                                      
        else                                                                                                                  
           action "Input: Failed to configure cold plugged devices."  /bin/false                                              
           action "Input: input.rc or input.agent missing."  /bin/false                                                       
        fi                                                                                                                    
   fi                                                                                                                         
fi                                                                                                                            
-----------------------------------------------------------------------------

D.4. Modified hotplug input.agent /etc/hotplug/input.agent

This /etc/hotplug/input.agent is modified to use the global configuration
file.
#!/bin/sh                                                                                           
# Please place this file /etc/hotplug                                                               
#                                                                                                   
# input-specific hotplug policy agent.                                                              
#                                                                                                   
# Kernel Input params are:                                                                          
#                                                                                                   
#       ACTION=add                                                                                  
#       PHYS=pysical location of device                                                             
#       NAME=Name of the device                                                                     
#                                                                                                   
# HISTORY:                                                                                          
#       15-Sep-2003     modified to use single configuration file                                   
#                       /etc/sysconfig/ruby.conf by me :-)                                          
#                       (Svetoslav Slavtchev)                                                       
#                       added handling for multimedia keys                                          
#                       but doesn't work as expected :(                                             
#       15-JUN-2003     removed paste                                                               
#       07-MAY-2003     remake by Aivils Stoss                                                      
#                       /proc manipulation added                                                    
#                       parse kbd.conf event.conf mouse.conf.                                       
#                       create necessary symbolic links                                             
#       28-SEP-2002     Initial version from Andreas Schuldei                                       
#                        andreas (at) schuldei.org                                                  
#                                                                                                   
cd /etc/hotplug                                                                                     
. hotplug.functions                                                                                 
DEBUG=yes export DEBUG                                                                              
                                                                                                    
RUBY_CONF="/etc/sysconfig/ruby.conf"                                                                
                                                                                                    
setup_kbd ()                                                                                        
{                                                                                                   
    while read VT_NUM PHYS_PATTERN NAME_PATTERN                                                     
    do                                                                                              
        if [ `echo "$VT_NUM" | grep "^#"` ]; then                                                   
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            VT=`echo "$VT_NUM" | sed 's/VT//' | awk '{printf "%02d", $0}'`                          
            if [ -d /proc/bus/console/$VT ]; then                                                   
                echo "$PHYS" > "/proc/bus/console/$VT/keyboard"                                     
                debug_mesg "Input device $NAME on $PHYS mapping as secondary to VT$VT"              
                return;                                                                             
            else                                                                                    
                debug_mesg "Trying to configure keyboard for VT$VT , but not enough VT's available" 
            fi                                                                                      
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting VT"                                                                
}                                                                                                   
                                                                                                    
                                                                                                    
setup_mm_keys ()                                                                                    
{                                                                                                   
    while read VT_NUM PHYS_PATTERN NAME_PATTERN                                                     
    do                                                                                              
        if [ `echo "$VT_NUM" | grep "^#"` ]; then                                                   
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            VT=`echo "$VT_NUM" | sed 's/VT//' | awk '{printf "%02d", $0}'`                          
            if [ -d /proc/bus/console/$VT ]; then                                                   
                echo "+$PHYS" > "/proc/bus/console/$VT/keyboard"                                    
                debug_mesg "Input device $NAME on $PHYS mapping as secondary to VT$VT"              
                return;                                                                             
            else                                                                                    
                debug_mesg "Trying to configure keyboard for VT$VT , but not enough VT's available" 
            fi                                                                                      
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting VT"                                                                
}                                                                                                   
                                                                                                    
setup_event ()                                                                                      
{                                                                                                   
    while read SYM_LINK PHYS_PATTERN NAME_PATTERN                                                   
    do                                                                                              
        if [ `echo "$SYM_LINK" | grep "^#"` ]; then                                                 
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            case $ACTION in                                                                         
            add)                                                                                    
                cd /dev/input                                                                       
                rm -f $SYM_LINK                                                                     
                ln -s $DEV_EVENT $SYM_LINK                                                          
                debug_mesg "Input event device $NAME on $PHYS linked to $SYM_LINK"                  
            ;;                                                                                      
            remove)                                                                                 
                rm -f /dev/input/$SYM_LINK                                                          
                debug_mesg "Input event device link $SYM_LINK removed"                              
            ;;                                                                                      
            esac                                                                                    
            return;                                                                                 
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting event device"                                                      
}                                                                                                   
                                                                                                    
setup_mouse ()                                                                                      
{                                                                                                   
    while read SYM_LINK PHYS_PATTERN NAME_PATTERN                                                   
    do                                                                                              
        if [ `echo "$SYM_LINK" | grep "^#"` ]; then                                                 
            continue;                                                                               
        fi                                                                                          
        if [ `echo "$PHYS" | grep $PHYS_PATTERN 2>/dev/null` ]; then                                
            case $ACTION in                                                                         
            add)                                                                                    
                cd /dev/input                                                                       
                rm -f $SYM_LINK                                                                     
                ln -s $DEV_MOUSE $SYM_LINK                                                          
                debug_mesg "Input mouse device $NAME on $PHYS linked to $SYM_LINK"                  
            ;;                                                                                      
            remove)                                                                                 
                rm -f /dev/input/$SYM_LINK                                                          
                debug_mesg "Input mouse device link $SYM_LINK removed"                              
            ;;                                                                                      
            esac                                                                                    
            return;                                                                                 
        fi                                                                                          
    done                                                                                            
    debug_mesg "Found no fitting mouse device"                                                      
}                                                                                                   
                                                                                                    
setup_input ()                                                                                      
{                                                                                                   
    if [ -n "$DEV_KBD" ]; then                                                                      
        sed -n "/keyboard devices/,/config/p" $RUBY_CONF        | setup_kbd                         
        sed -n "/multimedia keys/,/config/p" $RUBY_CONF         | setup_mm_keys                     
    fi                                                                                              
    if [ -n "$DEV_EVENT" ]; then                                                                    
        sed -n "/event devices/,/config/p" $RUBY_CONF           | setup_event                       
    fi                                                                                              
    if [ -n "$DEV_MOUSE" ]; then                                                                    
        sed -n "/mouse devices/,/config/p" $RUBY_CONF           | setup_mouse                       
    fi                                                                                              
}                                                                                                   
                                                                                                    
if [ "$ACTION" = "" ]; then                                                                         
    mesg Bad input agent invocation                                                                 
    exit 1                                                                                          
fi                                                                                                  
                                                                                                    
DEV_HANDLERS=`grep -E 'Phys|Handlers' /proc/bus/input/devices | \                                   
    awk '{ if(count == 0) { printf("%s\t",$0); count++; } else { print $0; count=0; } }' | \        
    grep $PHYS | awk -F\t '{print $2}' | sed 's/^.*=//'`                                            
                                                                                                    
DEV_EVENT=`echo $DEV_HANDLERS | \                                                                   
            awk -F" " '{for(n=1;$n;n=n+1) if($n ~ /event/) print $n}'`                              
DEV_MOUSE=`echo $DEV_HANDLERS | \                                                                   
            awk -F" " '{for(n=1;$n;n=n+1) if($n ~ /mouse/) print $n}'`                              
DEV_KBD=`echo $DEV_HANDLERS | \                                                                     
            awk -F" " '{for(n=1;$n;n=n+1) if($n ~ /kbd/) print $n}'`                                
                                                                                                    
#                                                                                                   
# What to do with this input device event?                                                          
#                                                                                                   
case "$ACTION" in                                                                                   
                                                                                                    
add)                                                                                                
    setup_input                                                                                     
    ;;                                                                                              
remove)                                                                                             
    #setup_input                                                                                    
    ;;                                                                                              
*)                                                                                                  
    debug_mesg "Input '$ACTION' event not supported"                                                
    return 1                                                                                        
    ;;                                                                                              
                                                                                                    
esac                                                                                                
                                                                                                    

Notes

[1]  All the features in Backstreet Ruby are included ( "/proc " interface & 
     hot-plugging, video hack, ...), support for Framebuffer devices, support
     for single Framebuffer console which takes over the VGA console (support
     for multiple independent Framebuffer consoles is not yet implemented)   





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