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Is there a DPMS option to turn one monitor off in a dual-head setup? I know the following can turn both off:

xset dpms force off
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migrated from May 11 '10 at 19:00

This question came from our site for system and network administrators.

Try the power button? :D – marcusw May 11 '10 at 21:05
That won't force the window manager to keep things on one display. – gatoatigrado Nov 22 '10 at 0:00
up vote 4 down vote accepted

xrandr --output $NAMEOFDISPLAY --off

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That's probably a good idea. I want this for reading [on one monitor -- I have two set up vertically] ... at first I was thinking of something interruptable like dpms, but that would probably be too interruptable, and I could always hotkey it it turn back on. Thanks. Unfortunately my desktop is using nvidia twinview, so is xrandr ineligible :(. – gatoatigrado Jul 17 '10 at 6:37

If you are using the nvidia driver, you can use twinview metamodes. You can find everything in the driver manual. After configuring, you can switch by using

xrandr -s 1

or use a 0 if you want to switch back.

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