[ltp] Starting of second x-server fails

[Florian Dorpmueller]

I am suffering with trying to start a second x-serverwith "xinit -- :1" on 
my R51 that has a Mobility Radeon 7500 inside; DRI (for the first x-server) 
is enabled. I am running debian sarge with Kernel 2.6.10.

The important section of /var/log/XFree86.1.log seems to be:

(WW) RADEON(0): Failed to set up write-combining range 
(0xe0000000,0x2000000)
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 6, (OK)
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 6, (OK)
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 6, (OK)
drmGetBusid returned 'PCI:1:0:0'
drmOpenDevice: minor is 1
drmOpenDevice: node name is /dev/dri/card1
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 2
drmOpenDevice: node name is /dev/dri/card2
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 3
drmOpenDevice: node name is /dev/dri/card3
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 4
drmOpenDevice: node name is /dev/dri/card4
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 5
drmOpenDevice: node name is /dev/dri/card5
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 6
drmOpenDevice: node name is /dev/dri/card6
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 7
drmOpenDevice: node name is /dev/dri/card7
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 8
drmOpenDevice: node name is /dev/dri/card8
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 9
drmOpenDevice: node name is /dev/dri/card9
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 10
drmOpenDevice: node name is /dev/dri/card10
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 11
drmOpenDevice: node name is /dev/dri/card11
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 12
drmOpenDevice: node name is /dev/dri/card12
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 13
drmOpenDevice: node name is /dev/dri/card13
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: minor is 14
drmOpenDevice: node name is /dev/dri/card14
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenByBusid: busid is PCI:1:0:0
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 6, (OK)
drmOpenByBusid: drmOpenMinor returns 6
drmOpenByBusid: drmGetBusid reports PCI:1:0:0
(II) RADEON(0): [drm] drmSetBusid failed (6, PCI:1:0:0), Device or resource 
busy
(EE) RADEON(0): [dri] DRIScreenInit failed.  Disabling DRI.

Another hint may be one line from the bootlog:
"No matching visual for __GLcontextMode with visual class = 0 (32775), 
nplanes = 8"
I don't know what this means.

Any help will be appreciated.

Florian