Exact same problem (at the unlock screen, it is not possible to enter any characters on the password box, as if focus is not there) on Xubuntu 18.04 and Xubuntu 20.04 in three different machines (two laptops and one desktop); problem existed since 18.04 and persists after upgrade to 20.20 focal fossa.
** Also affects: xubuntu-greeter Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311403 Title: Can't type password after resume. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1311403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs