Created attachment 29952 [details]
Xorg log file until the crash

/usr/bin/X crashes with 

Fatal server error:
Caught signal 11.  Server aborting

when I 
(a) start a desktop session with kdm (K display manager) and 
(b) logout of that session.
 
The X backtrace as found in Xorg.0.log is:

Backtrace:
0: /usr/bin/X(xorg_backtrace+0x30) [0x53b850]
1: /usr/bin/X(xf86SigHandler+0x9a) [0x4c1053]
2: /lib/libc.so.6 [0x7f7a86d03f90]
3: /usr/lib/libdrm_intel.so.1(drm_intel_bo_alloc+0x1c) [0x7f7a85685978]
4: /usr/lib/xorg/modules/drivers//intel_drv.so [0x7f7a858d749e]
5: /usr/lib/xorg/modules/drivers//intel_drv.so(i830_allocate_memory+0x336) [0x7f
7a858d7a02]
6: /usr/lib/xorg/modules/drivers//intel_drv.so [0x7f7a858d8ada]
7: /usr/lib/xorg/modules/drivers//intel_drv.so(i830_allocate_2d_memory+0xad) [0x7f7a858d8f36]
8: /usr/lib/xorg/modules/drivers//intel_drv.so [0x7f7a858cccd7]
9: /usr/lib/xorg/modules/drivers//intel_drv.so [0x7f7a858ccec0]
10: /usr/lib/xorg/modules/drivers//intel_drv.so [0x7f7a858cdf3a]
11: /usr/bin/X(AddScreen+0x34d) [0x4341c9]
12: /usr/bin/X(InitOutput+0x1527) [0x48b9e4]
13: /usr/bin/X(main+0x29d) [0x433396]
14: /lib/libc.so.6(__libc_start_main+0xfd) [0x7f7a86cf09ed]
15: /usr/bin/X [0x432ff9]

Messages in kernel.log and messages.log:

Sep 30 18:20:51 alix kernel: [drm] DAC-6: set mode 1440x900_60 24
Sep 30 18:21:01 alix kernel: CPU0 attaching NULL sched-domain.
Sep 30 18:21:01 alix kernel: CPU1 attaching NULL sched-domain.
Sep 30 18:21:01 alix kernel: CPU0 attaching sched-domain:
Sep 30 18:21:01 alix kernel: domain 0: span 0-1 level MC
Sep 30 18:21:01 alix kernel: groups: 0 1
Sep 30 18:21:01 alix kernel: CPU1 attaching sched-domain:
Sep 30 18:21:01 alix kernel: domain 0: span 0-1 level MC
Sep 30 18:21:01 alix kernel: groups: 1 0
Sep 30 18:30:02 alix kernel: [drm] DAC-6: set mode 1024x768 16
Sep 30 18:30:02 alix kdm[2307]: X server for display :0 terminated unexpectedly
Sep 30 18:30:02 alix kdm[2307]: Unable to fire up local display :0; disabling.


The software I am running: Arch linux with
kernel26 2.6.31.1-1
xf86-video-intel 2.8.1-1
xorg-server 1.6.3.901-1
mesa 7.5.1-2

Kernel mode setting is enabled.

Hardware:
00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
Monitor: Samsung SM943NW. The native resolution of this monitor is 1440x90 and is not autodetected by xorg