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<body><span class="vcard"><a class="email" href="mailto:johan.freedesktop@thoren.xyz" title="Johan Thorén <johan.freedesktop@thoren.xyz>"> <span class="fn">Johan Thorén</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [Lenovo ThinkPad T450s] System hang with MST dock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103643">bug 103643</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>CLOSED
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<td>REOPENED
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<td style="text-align:right;">Resolution</td>
<td>WORKSFORME
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<td>---
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [Lenovo ThinkPad T450s] System hang with MST dock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103643#c19">Comment # 19</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [Lenovo ThinkPad T450s] System hang with MST dock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103643">bug 103643</a>
from <span class="vcard"><a class="email" href="mailto:johan.freedesktop@thoren.xyz" title="Johan Thorén <johan.freedesktop@thoren.xyz>"> <span class="fn">Johan Thorén</span></a>
</span></b>
<pre>This error still occurs on kernel 4.20.
My model is T470s and the behavior is consistent: It only happens when
connected to an external display through the dock, not when using it
disconnected from the dock. Can (most of the time) be triggered by changing
display settings through xrandr.
Dock model is SD20F82750.
Dmesg error message:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun
GPU: Intel Corporation Skylake GT2 [HD Graphics 520] (rev 07)</pre>
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