X unexpectedly restarts

[Tomas Ingo]

Sometimes, at completely random occasions, X suddenly just restarts. The screen goes black for a second, returns to normal for a second, and then suddenly I am brought back to the login screen. If you look at /var/log/syslog there is always this line:

Oct 11 15:27:50 helena gdm[5621]: WARNING: gdm_slave_xioerror_handler: Vakava X-virhe – :0 käynnistetään uudelleen

The gdm[number] varies from time to time, though. I use Ubuntu in Finnish, and "Vakava X-virhe – :0 käynnistetään uudelleen" means "Serious X error - :0 restarting".

Please look at this forum thread, where I've been asking for help in this case: http://ubuntuforums.org/showthread.php?p=5634051

There you can find a few /var/log/syslog entries and two instances of /var/log/Xorg.0.log

I use Ubuntu 8.04.1

[srgb (work-serge)]

I see the same on Ubuntu 9.04 + NVIDIA 185.18.14 driver taken from www.nvidia.com,
Laptop: Dell D620 laptop
GPU: nVidia Corporation G72M [Quadro NVS 110M/GeForce Go 7300]

Attaching my XOrg log file, the most interesting lines are:
-----------
(II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select+0+0@1440x900"
(II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select+0+0@1440x900"
(II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select+0+0@1440x900"
(II) PM Event received: Capability Changed
(II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select+0+0@1440x900"
(II) PM Event received: Capability Changed
(II) NVIDIA(0): Initialized GPU GART.

Backtrace:
0: /usr/X11R6/bin/X(xorg_backtrace+0x3b) [0x813518b]
1: /usr/X11R6/bin/X(xf86SigHandler+0x55) [0x80c7be5]
2: [0xb7ef7400]
Saw signal 11. Server aborting.
-----------

[srgb (work-serge)]

... and I see the same line in syslog as Tomas described:
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Aug 7 20:24:08 svinogradov-lt gdm[3822]: WARNING: gdm_slave_xioerror_handler: Fatal X error - Restarting :0
---------