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<body><span class="vcard"><a class="email" href="mailto:htl10@users.sourceforge.net" title="Hin-Tak Leung <htl10@users.sourceforge.net>"> <span class="fn">Hin-Tak Leung</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - FIFO underrun, visual glitches and instability with dual monitors"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109376">bug 109376</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - FIFO underrun, visual glitches and instability with dual monitors"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109376#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - FIFO underrun, visual glitches and instability with dual monitors"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109376">bug 109376</a>
from <span class="vcard"><a class="email" href="mailto:htl10@users.sourceforge.net" title="Hin-Tak Leung <htl10@users.sourceforge.net>"> <span class="fn">Hin-Tak Leung</span></a>
</span></b>
<pre>boot to 4.20.12 and the visual glitches happened once on unlock, and have a
FIFO underrun message also:
# uname -r
4.20.12-042012-generic
# grep FIFO kern.log
Mar 5 11:07:44 ... kernel: [ 2669.215740]
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun</pre>
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