After upgrading to Ubuntu 18.10, the lock screen curtain does not respond to any input. As I understand, it should be possible to swipe up with the mouse, press Space, Esc, Enter or just start typing the password.
None of these works, and there is no option to exit the curtain other than killing the computer and then restart. It makes the computer almost useless.
If anyone have a solution for this, I would be extremely grateful!