Comment 37 for bug 363672

I got this similar issue on my laptop that I spoke about in the previous reply. I checked syslog and it did not show the same message as in this report. X didn't consume all CPU either. All I saw whas that the driver crashed and a reboot or standby/hibernate fixes it for the time being.
So, Intel and nVidia cards not giving video after some time or at certain circumstances: not related.