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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 - GP107GLM [Quadro P1000 Mobile]: frequent failure to initialize displays on Thunderbolt dock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110993">110993</a>
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<th>Summary</th>
<td>GP107GLM [Quadro P1000 Mobile]: frequent failure to initialize displays on Thunderbolt dock
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>git
</td>
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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
</td>
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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>Driver/nouveau
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Reporter</th>
<td>markus@bluegap.ch
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<pre>When connecting to the Thunderbolt 3 Dock, the monitors attached to it more
often remain black rather than showing a proper image. Sometimes the Laptop
freezes entirely, other times just one of the two comes up, most of the time,
they remain black and eventually enter standby.
I'm using a Lenovo P1 featuring a Quadro P1000 Mobile GPU. An integrated GPU
is wired to the internal display as eDP-1. The Nvidia card exposes an HDMI
port on the laptop. Plugging a monitor there directly usually works. Vie the
docking station, I get another 3 ports controlled by the Nvidia GPU. These are
either HDMI or DisplayPort. I have two monitors for experimentation, a Dell
one and a Lenovo one.
I'm running a Linux 5.2-rc5 kernel and the nouveau driver compiled from a
current checkout of the git repo of Ben Skeggs
(<a href="https://github.com/skeggsb/nouveau/tree/f91e915b6a12c281aed4401a869881f293b72d4e">https://github.com/skeggsb/nouveau/tree/f91e915b6a12c281aed4401a869881f293b72d4e</a>).
Most of the time, I'm running with the runpm_fixes of Karol Herbst (that is
the last five revisions from
<a href="https://github.com/karolherbst/nouveau/tree/runpm_fixes">https://github.com/karolherbst/nouveau/tree/runpm_fixes</a>).
The output of `grep . /sys/class/drm/card*-*/status` after a start w/o the dock
or any display attached is:
/sys/class/drm/card0-eDP-1/status:connected
/sys/class/drm/card1-DP-1/status:disconnected
/sys/class/drm/card1-DP-2/status:disconnected
/sys/class/drm/card1-HDMI-A-1/status:connected
/sys/class/drm/card1-eDP-2/status:disconnected
I'll provide further details of what I did together with the corresponding
kernel logs with tracing enabled in follow-up comments and attachments.</pre>
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