xbacklight
Utility to adjust the screen backlight brightness
Xbacklight is used to adjust the backlight brightness where supported. It uses the RandR extension to find all outputs on the X server supporting backlight brightness control and changes them all in the same way.
There is no official package available for openSUSE Leap 15.4Distributions
openSUSE Tumbleweed
Unsupported distributions
The following distributions are not officially supported. Use these packages at your own risk.