Public bug reported: 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) ** Affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1859955 Title: Display freaks out when external monitors are attached To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1859955/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
