[Bug 85898] [IVB/HSW]igt/kms_flip subcases sporadically cause *ERROR* uncleared pch fifo underrun on pch transcoder A

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85898

--- Comment #4 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Daniel Vetter from comment #3)
> I wonder whether we should tune down underrun warnings on the PCH, seems to
> happen why too often in random circumstances ...

IIRC I saw something like this on my IVB, but only with the non-existing VGA
connector. I didn't post the patch since I couldn't be sure if it was just
specific to that machine. As I recall, the cure involved rearranging the PCH
underrun reporting disable/enable points a bit. I can see if I can still
reproduce it here and maybe resurrect that patch, or recreate it if I can't
find it anymore.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20141118/5e79958f/attachment-0001.html>