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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 - [SKL] Connector states are not updated after resume"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107967">107967</a>
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<th>Summary</th>
<td>[SKL] Connector states are not updated after resume
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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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>harn-solo@gmx.de
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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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<th>i915 platform</th>
<td>SKL
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<th>i915 features</th>
<td>power/suspend-resume
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<pre>Whenever I switch my work environment with my laptop between my office setup
and my home setup within a suspend/resume-cycle, the connector output states
are not updated.
The laptop involved, is a Lenovo Thinkpad T460p. On both sites a Lenovo
ThinkPad Ultra Dock (type 40A2) is used.
Home monitor setup:
Eizo S2431W 24" in landscape mode, connected to DP3-1
Office monitor setup:
Eizo S2433W 24" in portrait mode, left, connected to DP3-1
Eizo S2431W 24" in landscape mode, right, connected to DP3-2
For details see the attached xrandr outputs.
Lately, at around kernel 4.16, when suspending the laptop in the office setup,
carrying to my home and resuming it there, the connector outputs are not
updated at all.
In this scenario the system shows a 90° rotated lock screen from KDE on the
only connected screen. Presumably the left one of from the office setup. The
xrandr tool still shows that DP3-1 and DP3-2 are connected.
The same happens vice versa, when suspend in the home setup and resuming it in
the office setup, it only displays one screen (on the one that is physically
rotated), probably because the are both connected to DP3-1.
I have attached two kernel outputs showing both suspend/resume cycles, one made
with kernel 4.18.8 and the other one already with drm-tip.
The only known workaround to that problem is to let the laptop resume in an
un-docked state before docking it again.</pre>
</div>
</p>
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