ddcutil
- It's a backlight utility package that can be used to query and set brightness settings
ddcutil capabilities # "Feature: 10" is brightness
ddcutil environment
ddcutil detect
# Brightness
ddcutil getvcp 10 # Get current brightness value
ddcutil setvcp 10 70 # Set brightness to 70
ddcutil setvcp 10 + 10 # -10 brightness
i2c-tools package is installed as a dependency for a good integration with i2c_dev module
pacman -S "i2c-tools"
groupadd --system "i2c" # create i2c group (if not exists already)
cp "/usr/share/ddcutil/data/45-ddcutils-i2c.rules" "/etc/udev/rules.d" # Copy the udev rule for the new group to rules.d
usermod -aG "i2c" "hvitoi" # add user to the i2c group