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I installed Ubuntu for the first time 3 weeks ago and I really love it. I have Ubuntu 12.04. My only problem is that when screen saver is on, it just shows blank screen, and not turning off the monitor, so my monitor is always on.

I have Samsung E2220 - 22". I looked over the web and I found this command:

sudo xset dpms force off

This command shuts down my screen so I don't see a reason why the screen saver can't shut it down.

Thanks a lot! Elad

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The screen saver isn't meant to turn it off. It is literally just a blank screen. If you want to turn the screens off, go to System Settings, click Brightness & Lock then chose how long you want the screen to turn off after from the dropdown.

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