I have experienced the same today. I am on a Linux Mint 14 system, with the latests kernel update installed.
I get the following in kern.log
[drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
[drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
Output of uname -a
Linux redemption 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:18:20 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
I have experienced the same today. I am on a Linux Mint 14 system, with the latests kernel update installed.
I get the following in kern.log hangcheck_ hung] *ERROR* Hangcheck timer elapsed... GPU hung dri/0/i915_ error_state
[drm:i915_
[drm] capturing error event; look for more information in /debug/
[drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
Output of uname -a
Linux redemption 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:18:20 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux