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Last active January 30, 2024 02:30
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Reduce or increase laptop display brightness from command line
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cmd-brightness.md

Reduce or increase laptop display brightness from command line

Note: Recently my Archlinux distro stop responding to the shortcut Fn+F3 and Fn+F4 for screen brightness adjustment. Then I found this solution at: https://www.ejmastnak.com/tutorials/arch/backlight/.

First, find out the value of your laptop.

cat /sys/class/backlight/intel_backlight/brightness

The directory might be different too in your laptop. The value of my laptop was 90000. So, I changed to 35000

echo 35000 | tee /sys/class/backlight/intel_backlight/brightness

If needs elevated privileges:

echo 35000 | sudo tee /sys/class/backlight/intel_backlight/brightness
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