<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94605#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94605">bug 94605</a>
from <span class="vcard"><a class="email" href="mailto:anomaly256@gmail.com" title="anomaly256@gmail.com">anomaly256@gmail.com</a>
</span></b>
<pre>Should add that I've tried with and without i915.enable_rc6=0, no effect. If I
try i915.semaphores=1 the machine hangs outright during boot after X starts
(In reply to anomaly256 from <a href="show_bug.cgi?id=94605#c10">comment #10</a>)
<span class="quote">> I'm seeing this on skylake, using the drm-intel nightlies (also sorry for
> cross posting about this on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [IVB] boot error: *ERROR* uncleared pch fifo underrun on pch transcoder A"
href="show_bug.cgi?id=89806">bug 89806</a> before I saw this bug)
>
> Using 2 monitors, one on DVI the other HDMI. The monitor that goes blank is
> using 1920x1200 res, and if I swap the outputs the monitors are using the
> same monitor goes blank, that is irrespective of the output its on. The
> second monitor which appears to be behaving better is using 1920x1080
> although I do get graphical artifacts on it that follow the mouse cursor,
> namely white lines stretching from the cursor to the far right edge of the
> display.
>
>
> I've tried switching from sna to uxa, no effect. Tried switching rendering
> from gl to egl, no effect.
>
> [ 2320.744016] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A
> FIFO underrun
> [ 2535.029670] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
> FIFO underrun
>
>
> Linux scorched 4.6.0-rc7+ #1 SMP Fri May 13 11:04:59 AEST 2016 x86_64
> Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz GenuineIntel GNU/Linux
>
> Using nightlies fetched and built about an hour ago.</span ></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>