Not sure if this is relevant, but I had a similar problem:
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Mar 11 16:09:21 bytesize-desktop kernel: [ 1141.077075] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
Mar 11 16:09:21 bytesize-desktop kernel: [ 1141.077095] [drm] capturing error event; look for more information in /sys/kernel/debug/d
ri/0/i915_error_state
Mar 11 16:09:21 bytesize-desktop kernel: [ 1141.082863] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x6043000 ctx
1) at 0x60431c8
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The fix for this for me was to change the display drivers to intel-01 drivers ( 01.org ). This bumped the MESA driver from 9.2.1 to 10.0.0.
From what i could guess it seamed to be sandy-bridge related, and apparently got fixed in MESA 9.2.3
Not sure if this is relevant, but I had a similar problem: hangcheck_ elapsed] *ERROR* stuck on render ring
------------------
Mar 11 16:09:21 bytesize-desktop kernel: [ 1141.077075] [drm:i915_
Mar 11 16:09:21 bytesize-desktop kernel: [ 1141.077095] [drm] capturing error event; look for more information in /sys/kernel/debug/d
ri/0/i915_ error_state
Mar 11 16:09:21 bytesize-desktop kernel: [ 1141.082863] [drm:i915_ set_reset_ status] *ERROR* render ring hung inside bo (0x6043000 ctx
1) at 0x60431c8
------------------
The fix for this for me was to change the display drivers to intel-01 drivers ( 01.org ). This bumped the MESA driver from 9.2.1 to 10.0.0.
From what i could guess it seamed to be sandy-bridge related, and apparently got fixed in MESA 9.2.3