Random Xorg restarts with GeForce GTS 250
 

Every once in a while, the X server restarts on me. Normally, I am not at the system when this happens, but today I was. The screen blacked out, I heard the fan on the graphics card increase its RPM and then decrease it and then I was at the KDM screen. The only evidence of the issue that I can find in the logs is an empty backtrace and a line in dmesg:

[328896.176321] NVRM: Xid (0000:01:00): 6, PE0001

I have attached nvidia-bug-report.log.gz.