[Bug 194766] [drm:pid12:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194766

--- Comment #18 from Ivan Klymenko <fidaj at ukr.net> ---
(In reply to Konstantin Belousov from comment #16)
Yes I changed this option manually in loader.conf
drm.i915.enable_rc6 = 7
But disabling this option does not affect to reproduce bug.

I found both guaranteed to reproduce the bug on my HW:
use in Firefox html5 video playback, which is involved gstreamer with hardware
video decoding.
And after a while watching the video appears this bug.

In other circumstances, is more difficult to understand because of what is
happening bug.

The only thing that would add - is widely used OpenGL WM - compton, or any
other OpenGL WM.

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