Created attachment 95296 [details]
running this demo results in firefox crashing and GPU hang/reset in dmesg:
unigine-crypt does the same
running drm-intel-nightly from yesterday, mesa git master as of today
I can confirm both of these hangs. We have a couple of Piglit tests with very similar looking hangs as well.
Linux kvm 3.13.0-20-generic #42-Ubuntu SMP Fri Mar 28 09:56:33 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop
OpenGL core profile version string: 3.1 (Core Profile) Mesa 10.1.0
OpenGL core profile shading language version string: 1.40
OpenGL core profile context flags: (none)
OpenGL core profile extensions:
[ 7119.744742] [drm] stuck on render ring
[ 7119.744748] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7119.744749] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 7119.744750] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 7119.744751] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 7119.744752] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[ 7119.747933] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x3de17000 ctx 3) at 0x3de18140
[ 7125.764317] [drm] stuck on render ring
[ 7125.784470] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x28936000 ctx 1) at 0x289362c0
Should be fixed by:
(In reply to comment #2)
> Linux kvm 3.13.0-20-generic #42-Ubuntu SMP Fri Mar 28 09:56:33 UTC 2014
> x86_64 x86_64 x86_64 GNU/Linux
> OpenGL vendor string: Intel Open Source Technology Center
> OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop
Not related. Create a new bug.
Author: Kenneth Graunke <firstname.lastname@example.org>
Date: Thu May 8 16:44:37 2014 -0700
i965: Fix GPU hangs on Broadwell in shaders with some control flow.
According to the documentation, we need to set the source 0 register
type to IMM for flow control instructions that have both JIP and UIP.
Fixes GPU hangs in approximately 10 Piglit tests, 5 es3conform tests,
Unigine Crypt, a WebGL raytracer demo, and several Steam titles.