https://bugs.freedesktop.org/show_bug.cgi?id=110993
Bug ID: 110993
Summary: GP107GLM [Quadro P1000 Mobile]: frequent failure to
initialize displays on Thunderbolt dock
Product: xorg
Version: git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/nouveau
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
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
(https://github.com/skeggsb/nouveau/tree/f91e915b6a12c281aed4401a869881f293b72d4e).
Most of the time, I'm running with the runpm_fixes of Karol Herbst (that is
the last five revisions from
https://github.com/karolherbst/nouveau/tree/runpm_fixes).
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.
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