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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - rotation causes undefined behavior after updating mesa (radeon, x11, kernel 4.10)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99978">99978</a>
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<th>Summary</th>
<td>rotation causes undefined behavior after updating mesa (radeon, x11, kernel 4.10)
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Other
</td>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>xaxazak@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Rotating one of my monitors makes it garbled and/or logs me out (causing
endless login loop).
Mesa 17.1 (padoka PPA).
Linux Kernel 4.10.
Xubuntu 16.10. (XFCE).
Radeon RX 480.
2 monitors:
A) Dell U2410 (1920x1080) via HDMI.
B) QNIX QX2710LED (2560x1440) via DVI.
Disabling #B doesn't help.
Not sure if this is a Mesa bug, but it's my best guess.
Note, this doesn't occur when using Unity, so it might be specific to X11?
I wonder if the unusual combo of HDMI + DVI might also be important - I did
find one related thread somewhere (lost it, sorry) mentioning they fixed
rotation issues by using different ports (Unfortunately, the QNIX only has
DVI).
This has been bugging me for a while, but I always rotated the monitor before
upgrading kernel/mesa etc so I didn't click that it was rotation until today.
Unfortunately I can't get a screenshot as it's too unstable. If it displays
anything before logging out it looks like strips of actual rotated desktop plus
strips of unintelligible data.</pre>
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