Thanks for all that. It certainly looks like a freeze because gnome- shell is still running when you reboot the machine.
As a potential workaround, please try 'Ubuntu on Wayland' which is an option on the login screen just before you enter your password. Please also confirm you are not using any gnome-shell extensions other than the Ubuntu ones (look in the 'Extensions' app). ** 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/1903986 Title: Ubuntu 20.04 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