[Bug 82458] [ILK] GPU hangs during normal desktop usage

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82458

--- Comment #5 from Martin Andersen <martin.x.andersen at gmail.com> ---
Sorry for the late comment. I've been testing this on 3.18rc1
(3.18.0-031800rc1-generic #201410192135) for about a week, and I am happy to
report that I'm unable to reproduce the problem.

I see quite a lot of drm/i915 fixes went into this version, and so far the
system has been running much better than on 3.16/3.17.

To my surprise I also notice that 23.976Hz refreshrates now appear to be
smoother on Ivy Bridge (/HD4000) – although still not perfect, but an
improvement nonetheless. (50Hz on one display where the other is running on 60
is still a little jerky though.)

The only GPU-related errors in the syslog comes shortly after the system has
been booted (presumably when XBMC is started on the second display.)

I am including those here for reference, although they do not seem to be
critical.

Mon Oct 27 01:32:03 2014] [drm:ivybridge_set_fifo_underrun_reporting] *ERROR*
uncleared fifo underrun on pipe A
[Mon Oct 27 01:32:03 2014] [drm:ivb_err_int_handler] *ERROR* Pipe A FIFO
underrun
[Mon Oct 27 01:32:03 2014] [drm:cpt_set_fifo_underrun_reporting] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[Mon Oct 27 01:32:03 2014] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A
FIFO underrun

So it appears the original issue has been fixed (hopefully the person who
created the bug report can also verify this.)

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