Seems similar to https://bugs.launchpad.net/mutter/+bug/1877075 that was supposed to be fixed, but not in all the cases, it seems.
** Description changed: The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 3.36.3-1ubuntu2, the problem page at https://errors.ubuntu.com/problem/5d9a112e0c6aeddb3cf972203bede962f60d767d contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/. + + Similar error: + https://errors.ubuntu.com/problem/14911e4a22eec995bc364278c0490d8bfea557dd ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete ** Also affects: mutter (Ubuntu) Importance: Undecided Status: New ** Changed in: mutter (Ubuntu) Assignee: (unassigned) => Daniel van Vugt (vanvugt) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1886059 Title: /usr/bin/gnome-shell:gnome-shell: ../../src/xcb_io.c:260: poll_for_event: F\303\266rs\303\244kran \342\200\235!xcb_xlib_threads_sequence_lost\342\200\235 falsk. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1886059/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs