Arch (xbacklight): No outputs have backlight property
archlinux, brightness, installation, linux
Solution
EDIT: I found this question because I had the same output error: no outputs have backlight property. `light` solved this with no further tinkering.
A better alternative to `xcalib` (which doesn't adjust backlight; won't save battery power): `light` available in community/light.
Usage
- `light -U 20` decrease backlight 20%
- `light -A 20` increase 20%
- `light -S 50` set backlight to 50%
Found here wiki.archlinux.org/index.php/backlight (thanks @icbytes).
Problem
I have two folders in my /sys/class/backlight: 1> acpi_video0 2> intel_backlight The intel_backlight is useless because I can use the following command to adjust brightness in acpi_video0 (I'm running Nvidia drivers): e.g: echo 50 > /sys/class/backlight/acpi_video0/brightness Problem: Using xbacklight -inc +5 outputs: "No outputs have backlight property" so I need to get it to use acpi_video0 So far, I have tried to rm the intel_backlight folder completely with no luck (using both sudo and changing permission to 777 recursively). I just wanna be able to hotkey the xbacklight to increment and decrement brightness. I can set brightness in acpi_video0 to a hard value using echo but don't know how to adjust it in increments. Kindly advise further! Regards :) EDIT 1: (POSSIBLE ALTERNATIVE) For anyone with this problem in the future, install xcalib. (Setup: Arch Linux w/ i3 window manager) ``` yaourt -S xcalib ``` And the following hotkey assignment (i3 in my case) in the config file: ``` # Brightness control reset screen (100% brightness) bindsym Mod1+Up exec xcalib -c # Brightness control down bindsym Mod1+Down exec xcalib -co 95 -a ```