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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 - i915 display link training after suspend/resume"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107679">107679</a>
</td>
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<th>Summary</th>
<td>i915 display link training after suspend/resume
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (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>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>freedesktop@delyan.me
</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=141272" name="attach_141272" title="kernel messages while system is trying to turn on the two attached displays">attachment 141272</a> <a href="attachment.cgi?id=141272&action=edit" title="kernel messages while system is trying to turn on the two attached displays">[details]</a></span>
kernel messages while system is trying to turn on the two attached displays
System: Dell XPS 9570 (Coffee Lake i7-8750H)
Kernel: 4.18.1-1.vanilla.knurd.1.fc28.x86_64
Kernel params: i915.enable_fbc=1 i915.enable_psr=1 i915.enable_guc=3
GuC/HuC versions:
kernel: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
kernel: [drm] HuC: Loaded firmware i915/kbl_huc_ver02_00_1810.bin (version 2.0)
kernel: [drm] GuC: Loaded firmware i915/kbl_guc_ver9_39.bin (version 9.39)
Steps:
1. Boot system.
2. Connect to Dell WD-15 dock (Synaptics VMM3332 chip inside).
3. Observe X11 session correctly modesetting two Dell displays connected to the
dock to 1920x1200. Laptop display gets disabled, per configuration.
4. Suspend system.
5. Resume system.
Expected behavior:
Both external displays wake up and modeset correctly.
Actual behavior:
Neither display wakes up, laptop display is still on, system is unresponsive
except for mouse movement.
Attached is the relevant kernel log from just after the resume.
I have also confirmed this bug on vanilla 4.19-rc0.
Please let me know if there's anything further I can provide, I can
consistently reproduce this issue.</pre>
</div>
</p>
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