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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 - Dell XPS 15 (9550) External Monitor not waking"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99438">99438</a>
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<th>Summary</th>
<td>Dell XPS 15 (9550) External Monitor not waking
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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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/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>ernstp@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>After a longer period of DPMS (haven't tested exactly where the threshold is) I
can no longer wake my external monitor.
The monitor is connected with a HDMI-DVI cable directly to the HDMI port of my
Dell XPS 15 9550.
The monitor, a HP LA2405x, has a number of settings for source/auto-detect but
none of them help.
Tested with kernel 4.9.3, both with Xorg and Wayland.
I see the same problem here:
<a href="http://askubuntu.com/questions/699649/15-10-dell-xps-15-9550-external-monitor-not-waking">http://askubuntu.com/questions/699649/15-10-dell-xps-15-9550-external-monitor-not-waking</a>
and here:
<a href="http://en.community.dell.com/support-forums/laptop/f/3519/t/19679539">http://en.community.dell.com/support-forums/laptop/f/3519/t/19679539</a>
Note this is with DPMS, doing a full suspend-resume usually fixes the problem.
Another workaround is to unplug the cable and put it back.</pre>
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