Those messages are mostly bug 1857392 which we usually ignore but yours are too frequent.
Please double check there are no non-standard extensions: cd ~/.local/share/gnome-shell/ rm -rf extensions and log in again. If the problem still happens after that then as an experiment try: gnome-extensions disable ubuntu-d...@ubuntu.com -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2100475 Title: Whole display freezes in 1 second interval for a while To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2100475/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs