Ubuntu – ny way to make a hotkey turn the screen off

power-managementscreenscriptsshortcut-keys

How can I make a script (or make some changes) to allow me to turn the screen off in Ubuntu (12.04) whenever I want, the way thevscreen can be turned off in Cellphones?

And how can I make a combination of keys (a shortcut) to execute that script?

I want to conserve power.

I've seen this question

Turning Monitor Off With an Icon but there is no hotkey for it.

Moreover, in the answer, it is said that there are many ways to accomplish this so I'd like to know more.

Best Answer

If I understood well your question, you could use this commmand

xset dpms force off

In your settings, go to keyboard, shortcut, click on plus, write the name you want and past the command I just wrote, click on the new short cut and use the combination or key you want to use

Related Solutions

Ubuntu – How To Program A Bash Script That Presses A Certain Combination Of Keys

For those who wants to accomplish this task, please follow the steps below:

Create an empty file and write the following simple bash script inside:

#!/bin/bash
xdotool key alt+shift+F12

Save the file as ".sh" and make it executable.

You can add any set of keys and this tool can also allow you to automate the mouse. You can create very useful scripts with it if used properly.

Happy coding!

Credits: Special thanks to @muru for teaching me how to write this script.

Tutorial: http://manpages.ubuntu.com/manpages/trusty/en/man1/xdotool.1.html

Ubuntu – How to turn off power to USB port

uhubctl author here:

uhubctl is using the same addressing method for USB devices as Linux kernel: b-x.y.z, where b is USB bus number, then x, y, z are port numbers of hub chain starting from root USB hub for a given bus. This addressing is semi-stable - it will not change if you unplug and plug USB devices back into the same physical port(s).
To answer your second question, I need to quote this from uhubctl README:

If you have compatible USB 3.0 hub connected to USB3 upstream port, it will be detected as 2 independent virtual hubs: USB2 and USB3, and your USB devices will be connected to USB2 or USB3 virtual hub depending on their capabilities and connection speed. To control power for such hubs, it is necessary to turn off/on power on both USB2 and USB3 virtual hubs for power off/on changes to take effect. uhubctl will try to do this automatically (unless you disable this behavior with option -e).

And finally, uhubctl will only list USB hubs that claim to support PPPS (per-port power switching). However, there are hubs that claim support but don't really work (switching circuitry is physically missing). I am maintaining list of all hubs that are known to work for sure.

If you happen to find hub that works with uhubctl but is not listed, please report it here.

Best Answer

Related Solutions

Ubuntu – How To Program A Bash Script That Presses A Certain Combination Of Keys

Ubuntu – How to turn off power to USB port

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