I only had pidgin extension there which I think has no effect on this issue but anyway I removed it and will keep an eye, it happens randomly so there is no certain way to reproduce.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1972150 Title: Login screen freezes and sometimes shows artifacts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1972150/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
