Now I have new laptop and not having this problem anymore. It looks like I was the only one having this problem. Because I don't need solution for this problem any more I think this bug report can be closed down.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1903986 Title: Ubuntu 20.04 (Xorg session) freezes with remmina in full-screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1903986/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs