On quantal with kernel 3.5.7-03050708-generic #201303180635 SMP, I already got 2 hangups in 2 hours. Not fixed.
[ 1618.193319] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung [ 1618.193335] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state [ 1618.200630] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 5016.818088] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung [ 5016.818342] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
On quantal with kernel 3.5.7-03050708- generic #201303180635 SMP, I already got 2 hangups in 2 hours. Not fixed.
[ 1618.193319] [drm:i915_ hangcheck_ hung] *ERROR* Hangcheck timer elapsed... GPU hung dri/0/i915_ error_state
[ 1618.193335] [drm] capturing error event; look for more information in /debug/
[ 1618.200630] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 5016.818088] [drm:i915_ hangcheck_ hung] *ERROR* Hangcheck timer elapsed... GPU hung
[ 5016.818342] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off