Since my monitor takes an awful lot of time to turn on, I'm looking for a command or a simple utility to turn off my screen with a shortcut. Setting a black screensaver is not satisfactory; I want the screen to "hibernate" (the same effect I would get by turning off the computer while leaving the screen physically on).

The same question for Windows: How can I make my screen blank by a shortcut?

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Press STRG a than k and than y – Daniel Jan 4 at 21:25
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1 Answer

Try using

xset dpms force off

to force the screen to turn off.

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That's really great. For the OP though, when a key is pressed, it turns the screen back on. I'm not sure if that's desirable. – FakeRainBrigand Jan 4 at 21:18
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Sometimes works better if you do sleep 1 ; xset dpms force off otherwise remnants of the last keyboard activity (I guess) sometimes turns the screen back on immediately. – Mat Jan 4 at 21:19
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