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 | 
|---|
|  | SuSE uses:Debian uses:Red Hat and Gentoo use:
 | 
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 | 
|---|
|  | 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
.............................. | 
 |