How to change the Monitor brightness on Linux?

Question

How do I programmatically change the monitor brightness on Linux?

I\'m using SLES 11.

Answer 1

You might look into using xgamma. Although it's not pure code, at least it's just a command line utility.

Answer 2

You can always use

xrandr --output LVDS1 --brightness 0.9

Answer 3

Here is the simple step to control brightness in Linux based system

First, you have to know the monitoring screen connected you.

To know this run this command

xrandr -q

It will give useful information about the screen

( Here my screen connected to eDP, It might be different for your system )

After knowing that run the below command

xrandr --output eDP --brightness [0-10]

Replace eDP by your connected screen from the above output.

you can choose normal brightness values from 0.1 to 1.0