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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [ILK/SNB/IVB]igt/testdisplay causes *ERROR* Pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=74102#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [ILK/SNB/IVB]igt/testdisplay causes *ERROR* Pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=74102">bug 74102</a>
from <span class="vcard"><a class="email" href="mailto:morfikov@gmail.com" title="Mikhail Morfikov <morfikov@gmail.com>"> <span class="fn">Mikhail Morfikov</span></a>
</span></b>
<pre>I've just updated the kernel:
$ uname -a
Linux morfikownia 4.6.0-1-amd64 #1 SMP Debian 4.6.1-1 (2016-06-06) x86_64
GNU/Linux
The issue isn't fixed. I still get the error in question. After waking from
hibernation I can see the following messages:
Jun 10 07:13:20 morfikownia kernel: [drm:ironlake_irq_handler [i915]] *ERROR*
CPU pipe A FIFO underrun
Jun 10 07:13:20 morfikownia kernel: [drm:ironlake_irq_handler [i915]] *ERROR*
PCH transcoder A FIFO underrun
Jun 10 07:13:21 morfikownia kernel: [drm] stuck on bsd ring
Jun 10 07:13:21 morfikownia kernel: [drm] GPU HANG: ecode 5:2:0x01000000,
reason: Ring hung, action: reset
Jun 10 07:13:21 morfikownia kernel: [drm] GPU hangs can indicate a bug anywhere
in the entire gfx stack, including userspace.
Jun 10 07:13:21 morfikownia kernel: [drm] Please file a _new_ bug report on
bugs.freedesktop.org against DRI -> DRM/Intel
Jun 10 07:13:21 morfikownia kernel: [drm] drm/i915 developers can then reassign
to the right component if it's not a kernel issue.
Jun 10 07:13:21 morfikownia kernel: [drm] The gpu crash dump is required to
analyze gpu hangs, so please always attach it.
Jun 10 07:13:21 morfikownia kernel: [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Jun 10 07:13:21 morfikownia kernel: drm/i915: Resetting chip after gpu hang</pre>
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