Test kernel did not fix the issue for me.
Linux matt-work 3.5.0-27-generic #45~lp1140716v1 SMP Fri Mar 22 15:50:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Mar 25 08:12:15 matt-work kernel: [ 158.302349] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung Mar 25 08:12:15 matt-work kernel: [ 158.302353] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state Mar 25 08:12:15 matt-work kernel: [ 158.305230] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off Mar 25 08:12:36 matt-work kernel: [ 179.663557] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung Mar 25 08:12:36 matt-work kernel: [ 179.663780] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
Test kernel did not fix the issue for me.
Linux matt-work 3.5.0-27-generic #45~lp1140716v1 SMP Fri Mar 22 15:50:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Mar 25 08:12:15 matt-work kernel: [ 158.302349] [drm:i915_ hangcheck_ hung] *ERROR* Hangcheck timer elapsed... GPU hung dri/0/i915_ error_state hangcheck_ hung] *ERROR* Hangcheck timer elapsed... GPU hung
Mar 25 08:12:15 matt-work kernel: [ 158.302353] [drm] capturing error event; look for more information in /debug/
Mar 25 08:12:15 matt-work kernel: [ 158.305230] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
Mar 25 08:12:36 matt-work kernel: [ 179.663557] [drm:i915_
Mar 25 08:12:36 matt-work kernel: [ 179.663780] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off