This morning, I see this error message showed in lightdm login interface, and cannot enter password.
So I went to TTY1 and saw:
[** ] A start job is running for monitor and control system power state (2min 45s / 3min 1s)
after waiting, it FAILED.
I went to TTY2, also can not enter password after typing my username.
Does anyone know why this happened? Possible Bug?
Restarting the machine, I can get the recovery console.