I've started dist upgrade to
20.04 from a graphical terminal and left it unattended for a while. Since I came back I can only see the lock screen (which is supposedly disabled until reboot, by the way) and it keeps rejecting the correct password.
I have verified the password correctness by displaying it in cleartext. I am able to login on a text terminal using
Ctrl+Alt+F3 with the same password. From shell, I can see that the
focal process is still running, but possibly waiting for user input, because cpu usage is very low. Tried
sudo apt update to see that the setup hasn't finished (a lock file is present). Before I left, the upgrade had already downloaded data and had already asked for user choice when configuring a keyboard package. It must be waiting for user input.
I've tried unlocking the/all sessions with
loginctl with no success.