I am seeing a similar issue with a second monitor plugged in. I am
using nouveau and it crashes the X server and logs me out. I have
attached a log of what happened. This is NOT connected with a screen
lock, it happens randomly.
Display is:
*-display
description: VGA compatible controller
product: GK107GLM [Quadro K1100M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:37 memory:d1000000-d1ffffff memory:70000000-7fffffff
memory:80000000-81ffffff ioport:5000(size=128) memory:c0000-dffff
** Attachment added: "The text file shows the nouveau error and the X server
crashing."
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1933609/+attachment/5536495/+files/CrashLog.txt
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https://bugs.launchpad.net/bugs/1933609
Title:
Locking screen crashes X/Wayland with nouveau when multiple monitors
are plugged in
Status in linux-signed-hwe-5.8 package in Ubuntu:
Confirmed
Bug description:
Trying to run Ubuntu 20.04 on some Dell workstations with Nvidia
Quadro P2200 cards. Getting some odd crashes. If a single monitor is
plugged and the workstation is power on you can then log in and plug a
second monitor in and locking the screen DOES not crash
X/Wayland/nouveau. If you boot the system with both monitors plugged
in then logging in and locking the computer will cause
X/Wayland/Nouveau to crash and only a reboot will fix it. You can
still ssh into the box though. The monitors are connected via
DisplayPort.
There were no kernel backtraces in the journal when running this bug
report. But in other cases there has been nouveau backtraces.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-59-generic 5.8.0-59.66~20.04.1
ProcVersionSignature: Ubuntu 5.8.0-59.66~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-59-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Jun 25 16:02:35 2021
InstallationDate: Installed on 2021-06-25 (0 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64
(20210209.1)
SourcePackage: linux-signed-hwe-5.8
UpgradeStatus: No upgrade log present (probably fresh install)
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