My screen turns off if I'm inactive for some time, even though I disabled the setting. It happens on battery as well as on AC power.

My Brightness and Lock Settings:

My Brightness and Lock Settings

My Power Settings:

My Power Settings

Does anybody what I forgot or how to fix this?

I already looked at this question, but I don't want to use Caffeine.


I've watched the problem for some time now and found that it is not really reproducible. It happens very seldomly by now, but when it happens I can't find out what it is triggered by. Sometimes it's on battery and sometimes not (although I have the feeling it happens more often on battery). Also the battery loading state doesn't seem to have anything to do with it.


I think I have found the reason, the screen is not turned off but a blank screensaver starts.

I don't know why Screensaver disappeared from system settings. I have installed xscreensaver package and deactivated it manually (set Mode = Disable Screen Saver).

Tell me if it will work for you.

| improve this answer | |
  • 1
    As I have written in the comments, the screen doesn't go blank but turns of. Is that the case with your solution? – André Stannek Dec 31 '12 at 17:29
  • Worked for me in Ubuntu 16.04. Thanks :) – CS13 Nov 13 '19 at 2:47

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