So... I have two monitors on my Ubuntu machine. And every time I launch some Windows OpenGL application under Wine it turns off the second monitor. And leaves it turned off when the application exits. I wonder, is there a shell command which will instantly turn the second monitor on?
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Gilles 'SO- stop being evil'
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Aleksandr Kravets
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1Try the `xrandr` command? – Graeme Apr 15 '14 at 13:13
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Any concrete samples? – Aleksandr Kravets Apr 15 '14 at 14:02
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Depends a lot on what you have/what you want. I use this on my laptop - `xrandr --output HDMI1 --auto --same-as LVDS1`. You can have `--left-of`, `--right-of` etc. – Graeme Apr 15 '14 at 14:06
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Ok, I'l try to read man – Aleksandr Kravets Apr 15 '14 at 14:07
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@Graeme you can answer question,and I will accept your answer. I read man page and created a link on my desktop which does what I want. – Aleksandr Kravets Apr 15 '14 at 14:16
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The xrandr command is the one you are looking for. An example usage is:
xrandr --output HDMI1 --auto --same-as LVDS1
You can have --left-of, --right-of. Run xrandr on its own to see the different outputs that are available.
Graeme
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1I'll add that to find out names of outputs one can run `xrandr --current` – Aleksandr Kravets Apr 15 '14 at 15:07
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@AleksandrKravets, shouldn't be any different than `xrandr` on its own in most cases. The man page says that this avoids looking for any hardware changes, so I would avoid this unless I have a specific reason to use it. – Graeme Apr 15 '14 at 15:12
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Use xrandr command without args for view your output names and the supported resolutions.
Once you have this informations, you can setup a screen like this (this is an example, there is a lot of others options):
**xrandr --output <output> --mode <resolution> --right-of/--left-of <output>**
You can also just reactivate your screen with:
**xrandr --output <output> --auto**
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1Sorry, there's no such thing as `--on` option. But there's `--auto`. – Aleksandr Kravets Apr 15 '14 at 14:14