I don't think that assertion is fatal so it's not what's crashing. This however is fatal:
dec 17 23:12:55 computer-name gnome-shell[2891]: GNOME Shell crashed with signal 11 dec 17 23:12:55 computer-name gnome-shell[2891]: == Stack trace for context 0x55db60db91a0 == If you have already reported a crash file then please check /var/crash to see if a new supplementary file has been created in that directory, which contains a short ID. Please tell us that ID string. Alternatively look at https://errors.ubuntu.com/user/ID where ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine. Do you find any links to recent problems on that page? If so then please send the links to us. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1908608 Title: Crash to login screen when plugging in/out external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1908608/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
