One click monitor power-down for Linux
If you’re running a Linux-powered laptop and you want to switch off the screen, without waiting for the laptop to go into sleep mode, then this is a great tip from Tombuntu.
To switch the your monitor off use the command: sleep 1 && xset dpms force off.
The sleep 1 (wait for one second) is needed only when you are typing the command in a terminal. This is because the command is executed as soon as the enter key is pressed, when it lifts up X turns the monitor back on.
To turn this into a Linux desktop shortcut, right-click on your desktop and select “create new launcher”.
The “command” setting must be set to “xset dpms force off” (without the sleep 1).