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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] Severe screen flickering on external monitor after i915.enable_psr=1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94985#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] Severe screen flickering on external monitor after i915.enable_psr=1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94985">bug 94985</a>
from <span class="vcard"><a class="email" href="mailto:pinguin255@gmail.com" title="dnord <pinguin255@gmail.com>"> <span class="fn">dnord</span></a>
</span></b>
<pre>Also "fifo_underrun" error messages are appearing each time during external
monitor connection, which are obviously directly related to this bug, as they
are appearing only when settings leading to this bug are set and not otherwise.
[ 559.660256] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 559.660274] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[ 559.660297] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 559.660309] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun</pre>
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