I'm having the same problem on oneiric. The screen randomly freezes for a few seconds (the mouse still moves, but everything else is dead), then everything turns black for a second, and then it all goes back to normal. Afterwards, I find this in my syslog:
[ 200.319085] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung [ 200.319094] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state [ 200.330227] [drm:i915_wait_request] *ERROR* i915_wait_request returns -11 (awaiting 31970 at 31965, next 31971) udevd[3721]: failed to execute '/usr/share/apport/apport-gpu-error-intel.py' '/usr/share/apport/apport-gpu-error-intel.py': No such file or directory [ 200.405176] [drm:ironlake_update_pch_refclk] *ERROR* enabling SSC on PCH [ 200.700351] [drm:ironlake_update_pch_refclk] *ERROR* enabling SSC on PCH The "enabling SSC on PCH"-error also appears randomly from time to time, but I don't notice it otherwise. Also, it only seems to occur when I have my second screen connected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805586 Title: i915 Hangcheck timer elapsed... GPU hung To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/805586/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs