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After a fresh install of Ubuntu 12.10, my screen still goes off after about ten minutes. I've been to the Brightness and Lock control panel. The Turn screen off when inactive for: setting is set for Never.

I've been through the dconf Editor searching for power, screen, and idle changing parameters. This doesn't seem to have any effect on the display timeout.

Here's one more interesting thing, the screen doesn't go off, per se. It just goes black. Meaning, the back lighting is still on, and all the pixels are black.
When it goes black, it does a very pleasant quick dim to black.
Similarly, it quickly un-dim's after a key press, mouse movement, or mouse click. So, I'm feeling this is more of a software setting the timeout, not a power saving function.

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2 Answers

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I just ran sudo xset s off from a terminal and it may be fixed.

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This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post. – Evandro Silva Nov 14 '12 at 13:40
@Dusty, dont keep us in suspense. Maybe fixed or is fixed? – Stephen Myall Nov 14 '12 at 14:39
I fixed this by xset s 0 0 - not sure if this is equivalent. – morgoth Nov 25 '12 at 15:55
This suggestion did work for me, but I also had to uncheck the 'Dim screen to save power' checkbox in the 'Brightness and lock' settings. – Zoltán Jan 12 at 20:57
... err which suggestion worked for you Zoltan? xset s off or xset s 0 0... This is a really confusing question/answer page. – Cory Gross Apr 16 at 1:32
up vote 1 down vote

There is a checkbox in Brightness And Lock application whose label is "Dim screen to save power". You must unmark it.

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There isn't such option at my ubuntu 12.10 :/ – Chris Nov 24 '12 at 21:19
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It still goes black, exactly as described in question - I'm on Ubuntu 12.10 and Gnome 3 (it worked fine on Unity) – morgoth Nov 25 '12 at 11:45
You should apply this advice in conjunction with the top rated answer, i.e. execute sudo xset s off. – Zoltán Jan 12 at 21:43

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