I was able to enter my password on ubuntu purple focal fossa lock screen (however i never wanted this screen to appear). Until now. Today i tried to enter the password, but failed to do this. The password field remains completely blank, and if i hit the login button with mouse, it says the password was incorrect.
Moreover, it seems that the keyboard input goes straight to other applications, e. g. i can switch between windows with alt+tab (and window list is shown (but no lock screen in this list)) and start/stop youtube videos (sound from which is played) with space key. So ironically it lost focus.
When i push "change user" button, user selection screen appears, and i can enter the correct password there, but i end up with the same focal fossa screen.
However i can log in to command line with ctrl+alt+f* or ssh.
I tried gnome-screensaver-command -d and loginctl unlock-session(s) with no effect. Also i tried to find and kill lock screen process and suspend/wake once again, but the effect was the same.
I use gnome-flashback, metacity and xscreensaver.
Also i have to mention that i played factorio yesterday. It was the second time i did that, but the first time i set "minimize on focus loss" option. And with this option it was quite difficult to maximize the factorio back, which i think is similar to the discussed symptoms (except i can not gain focus on the lock screen cos it is not shown in alt+tab window list). However i exited factorio before suspension.
How i can log in without rebooting or restarting session?
Thanks in advance.
xscreensaver?