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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ICL] SDP built-in eDP display sometimes gets stuck in bogus retrain loop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110286">110286</a>
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<th>Summary</th>
<td>[ICL] SDP built-in eDP display sometimes gets stuck in bogus retrain loop
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<th>Product</th>
<td>DRI
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<th>Version</th>
<td>DRI git
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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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>lyude@redhat.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=143811" name="attach_143811" title="Boot with eDP, hotplug mini-DP">attachment 143811</a> <a href="attachment.cgi?id=143811&action=edit" title="Boot with eDP, hotplug mini-DP">[details]</a></span>
Boot with eDP, hotplug mini-DP
Hi! I've got myself an icelake SDP: Ice Lake-U 4+2 Alpha OSV. things mostly
work, but there's one pretty bizarre issue I've been hitting with the built-in
eDP display.
It seems that if I boot up the machine with only the eDP display connected,
things work fine. However: if I plug in a display into the Mini-DP port then
the Mini-DP display comes up, but the eDP display suddenly gets stuck in a
retrain loop and doesn't come back on.
Things get a bit weirder though: if I have both the eDP and mini-DP display
connected when booting up the machine, then things never break. I can even
hotplug the mini-DP display after booting up, and the eDP display retrains
itself just fine.
Will attach dmesg logs with:
- Booting with eDP connected, and hotplugging
- Booting with eDP and Mini DP
Along with edid for the eDP display</pre>
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