I've found this in the kernel log:
Apr 3 23:00:26 orion kernel: [ 575.444041] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung Apr 3 23:00:26 orion kernel: [ 575.444056] render error detected, EIR: 0x00000000 Apr 3 23:00:26 orion kernel: [ 575.444070] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 27995 at 27994)
I've found this in the kernel log:
Apr 3 23:00:26 orion kernel: [ 575.444041] [drm:i915_ hangcheck_ elapsed] *ERROR* Hangcheck timer elapsed... GPU hung do_wait_ request] *ERROR* i915_do_ wait_request returns -5 (awaiting 27995
Apr 3 23:00:26 orion kernel: [ 575.444056] render error detected, EIR: 0x00000000
Apr 3 23:00:26 orion kernel: [ 575.444070] [drm:i915_
at 27994)