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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Regression linux 5.1-rc1] Displayport 1.2 tty second monitor corruption"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110250">110250</a>
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<th>Summary</th>
<td>[Regression linux 5.1-rc1] Displayport 1.2 tty second monitor corruption
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>freedesktop@sibrenvasse.nl
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=143781" name="attach_143781" title="Bisect log & result">attachment 143781</a> <a href="attachment.cgi?id=143781&action=edit" title="Bisect log & result">[details]</a></span>
Bisect log & result
I have two monitors daisy chained via Displayport 1.2.
GPU: Radeon RX 570 4GB
amdgpu.dc=1 (issue does not occur when disabled)
After upgrading to Linux 5.1-rc1 when switching to a tty the second monitor
(that's connected to the first) displays a corrupted version of the first
monitor. Previously this would display a stretched version of monitor 1
(because of a different aspect ratio).
There is no output in dmesg when switching to a tty.
I have bisected the issue between tags v5.0 and v5.1-rc1. The result was
bc7f670ee04cd619f8c4627c37d77b3618bc5edd as the first bad commit. Bisect log
attached.
commit 8a48b44cd00f10e83f573b9028d11bd90a36de26
GOOD
commit bc7f670ee04cd619f8c4627c37d77b3618bc5edd
BAD
After switching from graphical environment to a tty, the second monitor will
keep displaying the last frame of the graphical environment.
commit b2e85302494a6b7d3a3006c8d80a729377600628
BAD
Screen display is corrupted.</pre>
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