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.

closed as off-topic by Braiam, andrew.46, Luís de Sousa, Eric Carvalho, terdon Jun 15 '16 at 12:13

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Bug reports and problems specific to development version of Ubuntu should be reported on Launchpad so that developers can see, track and fix these issues." – andrew.46, Luís de Sousa, Eric Carvalho, terdon
If this question can be reworded to fit the rules in the help center, please edit the question.


I just did a hard restart. Turn your computer off, unplug all accessories (cords, exterior cooling fan, joysticks, etc.), take yor battery out, hold power button down for 60 secs, put the battery back in, and restart the computer.

Worked for me. Good luck.

Not the answer you're looking for? Browse other questions tagged or ask your own question.