Indeed the source code suggests that error is from gnome-shell itself. Next time the problem happens, please run:
journalctl -b0 > journal.txt and then attach the resulting text file here. ** Tags added: groovy ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926932 Title: Error message too short to understand what is wrong To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1926932/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs