[Bug 83341] [HSW]igt/gem_reset_stats sporadically causes poweroff

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83341

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #2 from lu hua <huax.lu at intel.com> ---

(In reply to Mika (In reply to Mika Kuoppala from comment #1)
> Is the last line in the log always:
> 'Stopping rings 0xc0000004' ?


I reproduce twice the hang. once the last line is as below:
[  136.904770] [drm:i915_ring_stop_set] Stopping rings 0xc0000004

once hang as below: 
output:
IGT-Version: 1.8-ge34240d (x86_64) (Linux:
3.18.0-rc3_drm-intel-nightly_e6b3eb_20141107+ x86_64)
Subtest params: SUCCESS (0.002s)
Subtest params-ctx-render: SUCCESS (0.001s)
Subtest reset-stats-render: SUCCESS (6.140s)
Subtest reset-stats-ctx-render: SUCCESS (5.996s)
Subtest ban-render: SUCCESS (16.001s)

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