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<body><span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [WHL] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111726">bug 111726</a>
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<table border="1" cellspacing="0" cellpadding="8">
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">i915 platform</td>
<td>
</td>
<td>CFL
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>NEEDINFO
</td>
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<tr>
<td style="text-align:right;">Whiteboard</td>
<td>
</td>
<td>Triaged
</td>
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<td style="text-align:right;">i915 features</td>
<td>
</td>
<td>display/watermark
</td>
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [WHL] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111726#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [WHL] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111726">bug 111726</a>
from <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
<pre>(In reply to Sushma from <a href="show_bug.cgi?id=111726#c0">comment #0</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=145408" name="attach_145408" title="dmesg for FIFO underruns in PIPE B">attachment 145408</a> <a href="attachment.cgi?id=145408&action=edit" title="dmesg for FIFO underruns in PIPE B">[details]</a></span>
> dmesg for FIFO underruns in PIPE B
>
> The issue is reproducible on Chrome OS WHL device when we connect a 4K
> external monitor to DUT. I was able to reproduce quite often using LG model
> 27UD88-W.
>
> Attaching the log where I could reproduce the issue even on drm-tip.</span >
Sushma, What is the impact of this issue other than the errors in the log?
What is the reproduction rate?
Can you please attach the dmesg from drmtip, that will be helpful to
investigate.
Update for myself: On our CI system last seen FIFO underrun on WHL is
drmtip_334 (1 month, 3 weeks old).</pre>
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