Also the purple screen in your video in comment #2 does suggest a crash so please follow these steps:
https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment ** Changed in: mutter (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/1908878 Title: gnome shell freezes for a couple of seconds, then it restarts (maybe it crashes?) To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1908878/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
