Thread: Help! X/GDM crashes then dies while attempting to restart once per second

i have computer running ubuntu 10.04.2 lts.

consistently after couple hours x desktop , gdm dies. works fine on other computers computer intel 2.4 ghz, 1.5 gb.

can't duplicated specific, know it's not out of ram @ point. console keyboard , mouse inoperational, , monitor display seems going through test patterns, turns out monitor trying sync video output switching on once second. can ssh box , see many processes running no longer running, example gnome-session... , once per second there new x process invoked different auth-for-gem parameter, per below:

/usr/bin/x :0 -nr -verbose -auth /var/run/gdm/auth-for-gdm-kynptf/database -nolisten tcp
(one second later...)
/usr/bin/x :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-gfbhrk/database -nolisten tcp
(one second later...)
/usr/bin/x :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-pribk0/database -nolisten tcp

how can troubleshoot this?

-----------------------------

here info various logfiles:

# dmesg | grep agp
[ 4.345441] linux agpgart interface v0.103
[ 4.377791] agpgart-intel 0000:00:00.0: intel 830m chipset
[ 4.378057] agpgart-intel 0000:00:00.0: detected 892k stolen memory
[ 4.381363] agpgart-intel 0000:00:00.0: agp aperture 128m @ 0xf0000000

# dmesg | grep -i vga
[ 0.000000] console: colour vga+ 80x25
[ 0.119552] vgaarb: device added: pci:0000:00:02.0,decodes=io+mem,owns=io+mem,locks= none
[ 0.119619] vgaarb: loaded
[ 4.517038] vga16fb: initializing
[ 4.517045] vga16fb: mapped 0xc00a0000
[ 4.517268] fb0: vga16 vga frame buffer device

# tail /var/log/messages
may 28 17:22:22 ubuntu pulseaudio[9271]: pid.c: stale pid file, overwriting.
may 28 17:22:22 ubuntu pulseaudio[9271]: main.c: unable contact d-bus: org.freedesktop.dbus.error.noserver: failed connect socket /tmp/dbus-i7xeal70ls: connection refused

# tail /var/log/xorg.0.log
(ii) glx: initialized dri2 gl provider screen 0
(ii) intel(0): setting screen physical size 270 x 203

fatal server error:
failed submit batchbuffer: input/output error

# tail /usr/adm/kern.log
may 28 17:45:54 ubuntu kernel: [577246.001043] [drm:i915_gem_idle] *error* hardware wedged
may 28 17:45:55 ubuntu kernel: [577247.175163] [drm:i915_gem_entervt_ioctl] *error* reenabling wedged hardware, luck
may 28 17:45:55 ubuntu kernel: [577247.488009] [drm:i915_hangcheck_elapsed] *error* hangcheck timer elapsed... gpu hung

anybody?

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