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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Problems with (tiled) MST display (Dell UP3214Q)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107845">107845</a>
</td>
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<tr>
<th>Summary</th>
<td>Problems with (tiled) MST display (Dell UP3214Q)
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>DRI git
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>pmenzel+bugs.freedesktop@molgen.mpg.de
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=141467" name="attach_141467" title="Linux 4.18.6 messages">attachment 141467</a> <a href="attachment.cgi?id=141467&action=edit" title="Linux 4.18.6 messages">[details]</a></span>
Linux 4.18.6 messages
Using the MST display Dell UP3214Q connected over DisplayPort, there are
several problems, which are happening since at least 4.14 and are still present
with Linux 4.18.6.
1. Restarting the system and leaving the monitor on, neither the Fujitsu
firmware nor Linux is able to display something. (This happens rarely.)
2. Turning the monitor off and back on, sometimes the monitor does not detect
a signal, and only after waiting a while and pressing keys, or turning it off
and back on several times, a connection is established and an image displayed
(which might have the problems below though).
3. The panel order is sometimes switched (LR becomes RL, where X and Y are
panels).
4. The X server shows each panel as one screen, and does not overlap them.
5. Instead of one full screen of 3840x2160, only one screen 1920x2160 seems to
be detected and stretched over the whole display.
The device below is used.
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 530
[8086:1912] (rev 06)
Please find the debug log attached. In this time the aforementioned problems
happened.</pre>
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