Arch Linux

Isayp

Member

Registered: 2019-12-24

Posts: 2

[SOLVED] "light" screen brightness issue

Hi all,

My first post here.

End goal: adjust screen brightness using "light" by binding "Fn + up arrow" key to "light -A 5" and similarly for decrease in brightness - "Fn + down arrow" key to "light -U 5" .

Problem: light commands require sudo in front, which prompts to a password if I run the command manually. After this is entered the screen brightness correctly changes. However, this is a problem if I try to bind the keys to the commands, even if I add sudo, as nothing happens when I hit the keys, which is expected since it requires a password to execute.

Question: how can this issue be circumvented? Should I give sudo privilege to the light command, or should that be avoided? Couldn't any solutions on the forums. Many thanks in advance!

Hardware: Dell XPS 9370

Last edited by Isayp (2019-12-24 22:27:29)

Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,525

Website

Re: [SOLVED] "light" screen brightness issue

See permissions:
https://github.com/haikarainen/light

This is also covered in our wiki:
https://wiki.archlinux.org/index.php/Backlight#ACPI

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"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

Isayp

Member

Registered: 2019-12-24

Posts: 2

Re: [SOLVED] "light" screen brightness issue

Thanks! Turns out I wasn't in the video group, worked after I added that.