[Bug 54226] [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54226

--- Comment #123 from David <bugzilla at dderby.com> ---
Created attachment 92710
  --> https://bugs.freedesktop.org/attachment.cgi?id=92710&action=edit
i915_error_state

I'm also getting regular Sandybridge GPU lockups with Mesa 10.0.1 and Linux
kernel 3.13. 

dmesg output:

[  918.876872] [drm] stuck on render ring
[  918.876876] [drm] stuck on blitter ring
[  918.876878] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  918.876879] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  918.876879] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  918.876880] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  918.876880] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  932.923240] [drm] stuck on render ring
[  932.923242] [drm] stuck on blitter ring

Unfortunately the crash dump doesn't help - it's an empty file!

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