TOOL » LINUX » X_SERVER

Xbacklight

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Reference:wiki.archlinux.org

Setup ​

To allow users of video group to change brightness, add the following lines to /etc/udev/rules.d/backlight.rules:

ini
ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="intel_backlight", RUN+="/bin/chgrp video /sys/class/backlight/%k/brightness"
ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="intel_backlight", RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"

And, of course, join the video group.

shell
sudo gpasswd -a mateus video

Tool install ​

Install the tool that updates the brightness.

shell
sudo pacman -S acpilight

Usage ​

shell
xbacklight OPTION
OptionDescription
NUMPercentage of brightness.
+NUMIncrement brightness in percentage.
-NUMDecrement brightness in percentage.