Comment 13 for bug 989191

The kernel options given by @smu-blackbox made this problem go away for me. I then tried to figure out which of the kernel options I had before may have caused the problem, but I couldn't make the problem come back. My originaloption line was

quiet splash drm.vblankoffdelay=1 i915.semaphores=1 i915.powersave=1

Running 12.10 kernel 3.5.0-22-generic #33-Ubuntu SMP Wed Jan 2 21:47:30 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux