Wow. Already reported, by the same person, 10000 bugs ago. Bug 1849955.
** Tags added: eoan
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1859955
Title:
Display freaks out when external monitors are attached
Status in gnome-shell package in Ubuntu:
New
Status in mutter package in Ubuntu:
New
Bug description:
Running Focal on my ThinkPad T450, but not unique to this release as
it happened on 19.10 (and probably older releases too).
Steps to reproduce.
While running GNOME Shell, attach the laptop to additional external monitors.
(I'm using a docking station, but equally you can attach them via the video
ports on the laptop itself)
Expected outcome
Desktop on 1 monitor goes away.
Desktop comes back on N monitors.
Actual outcome
Laptop display goes black
Laptop display comes back, moved 50% horizontally
One external monitor comes on
Laptop display goes back to normal
Second external monitor comes on
All three displays go off again
Laptop display comes on again alone
Laptop display goes off again
laptop display comes on again
External monitors come back on again
System is usable.
The entire process takes twenty seconds.
https://www.youtube.com/watch?v=QuSudpxVOao
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.34.3-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
Uname: Linux 5.4.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu15
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 16 10:21:05 2020
DisplayManager: gdm3
InstallationDate: Installed on 2018-02-04 (710 days ago)
InstallationMedia: neon userlts "Xenial" - Build amd64 LIVE Binary
20180202-11:07
RelatedPackageVersions: mutter-common 3.34.3-1ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to focal on 2020-01-08 (7 days ago)
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