[Bug 194766] [drm:pid12:i915_hangcheck_elapsed] [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Jan 8 14:47:34 UTC 2016


--- Comment #39 from Kenneth Salerno <kennethsalerno at yahoo.com> ---
First of all, this bug has been open 14 months. I would like to believe there
are fbsd developers left out there that care about laptop/desktop issues, and
so I wait. I upgraded to 10.2-RELEASE multiple times to try each "fix" and then
downgraded back to 10.1-RELEASE to have a working Xv acceleration again, but at
this point I will wait until I see a code fix enter the 10.2-RELEASE branch
rather than try any more "workarounds" (and a clue for other users, it is in
the drm2 driver not drm), or wait and see if 10.3-RELEASE incorporates changes
from 11-CURRENT that fix the i915kms/drm2 code.

This bug is the result of the import of Linux kernel modeset driver code that
brought the bug along with the version that was copied. If you search through
Linux kernel bug reports you'll see they had the same issue, and freebsd svn
logs confirm the wholesale import. Looking through the latest 11-CURRENT
branch, I see some attempts in the code to stop the GPU hung messages from
appearing but personally have not tested if that is a cosmetic bandaid or not.

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