That assertion seems to repeat in comment #5, so it's not fatal and not the root cause of any crash. Everyone still experiencing crashes please open a new bug from the affected machine and follow:
https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment I don't think commenting here is helpful anymore. Also this bug is already closed. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. https://bugs.launchpad.net/bugs/1952766 Title: Disconnecting monitor crashes shell (wayland, gnome) Status in gnome-shell-extension-ubuntu-dock package in Ubuntu: Expired Bug description: This bug has been persisting since I've bought an external monitor for my laptop and started using Wayland (first on Ubuntu 20.04) until today (Ubuntu 21.10). It isn't consistent, but it occurs about 90% of the time when I'm on Wayland. On Xorg, this has never occurred. When I unplug my USB-C monitor from my laptop, the laptop screen freezes for a while before presenting me with the login screen. When I log back in, all my open applications have been shut down. I assume Mutter crashes, taking the entire session with it. Dmesg doesn't seem to contain anything useful. A lot of other people seem to have this problem (see https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1733127), but all have been asked to file their own bug reports, so here I am. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu71 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 21.10 InstallationDate: Installed on 2020-04-01 (613 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) Package: gnome-shell 40.5-1ubuntu2 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19 RelatedPackageVersions: mutter-common 40.5-1ubuntu3~21.10.1 Tags: wayland-session impish third-party-packages Uname: Linux 5.13.0-22-generic x86_64 UpgradeStatus: Upgraded to impish on 2021-10-05 (61 days ago) UserGroups: adm cdrom dip docker libvirt lpadmin lxd plugdev sambashare sudo _MarkForUpload: True modified.conffile..etc.apport.crashdb.conf: [modified] mtime.conffile..etc.apport.crashdb.conf: 2021-12-01T17:24:37.722144 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1952766/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp