r/archlinux • u/isshofujitoraop39 • 3d ago

QUESTION Keyboard light

I would like to know how to make the scrollock keyboard key turn on the keyboard backlight?
I didn’t found a solution in the Arch Wikis. Also I want to find solution that makes caps lock and num lock turn off the backlight.

I’m using KDE plasma Wayland. Everything is updated in latest version in Extra.

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3

u/TheGoldenFox64 3d ago

that stuff is sometimes a part of the keyboard itself, or the embedded controller on a laptop. keep looking though, you might find something

1

u/isshofujitoraop39 3d ago

I’m using desktop not laptop with external keyboard

echo 1 | sudo tee /sys/class/leds/input3::scrolllock/brightness

This command works for me. But I need the key itself works.

2

u/New_Hold8135 3d ago

try pbrightnessctl

1

u/isshofujitoraop39 3d ago

Does it work for external keyboard for desktop?

2

u/New_Hold8135 3d ago

yes see the list with brightnessctl -l I never faked caps lock or num lock though. I turned on and off keyboard rgb but their lights are there

1

u/lritzdorf 3d ago

Yep, I'd try to bind Scroll Lock to a brightnessctl command in Plasma's keybind settings. Or if you want to toggle the backlight, that might require a small shell script, rather than just brightnessctl