As a workaround, this
commit a24a11e6b4e96bca817f854e0ffcce75d3eddd13
Author: Chris Wilson <[email protected]>
Date: Thu Mar 14 17:52:05 2013 +0200
drm/i915: Resurrect ring kicking for semaphores, selectively
should improve the recovery from the hangs.
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https://bugs.launchpad.net/bugs/1041790
Title:
[snb] GPU lockup IPEHR: 0x0b160001 IPEHR: 0x0b140001, workaround
i915.semaphores=0
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