Wayland - Change monitor Brightness, Contrast and RGB values with ddcutil

ddcutil_commands.sh

# 
# ddcutil https://www.ddcutil.com/
#
# If you don't like commands there's a GUI available too: https://www.ddcutil.com/#ddcui


# 1 Getting our monitors

ddcutil detect
# This will return the monitors detected by ddcutil, we need this first in case we only want to change a single monitor
# This will also tell us if the monitor is detected, and if it is valid
# https://www.ddcutil.com/command_detect/


# 2 Getting monitor values

ddcutil getvcp color --display 1 # replace with number of desired display
# This will return the current values of the display for the group "color"
# https://www.ddcutil.com/command_getvcp/

# There are more groups available besides "color"
# https://www.ddcutil.com/feature_selection/

# We can also get values by feature
ddcutil getvcp 10 --display 1 # replace with number of desired display
# This will return the value of Brightness (10) on the 1st display
# Full list:
# https://www.ddcutil.com/vcpinfo_output/
# Or run 
ddcutil vcpinfo --brief


# 3 Changing monitor values
ddcutil setvcp 10 50 --display 1 # replace with number of desired display
# This will set the Brightness (10) on the first display to 50


# A few more useful feature codes:

#    10: Brightness
#    12: Contrast
#    13: Backlight control
#    14: Video gain: Red
#    16: Video gain: Green
#    18: Video gain: Blue
#    6B: Backlight level: White
#    6C: Video black level: Red
#    6D: Backlight Level: Red
#    6E: Video black level: Green
#    6F: Backlight level: Green
#    70: Video black level: Blue
#    71: Backlight Level: Blue

# https://www.ddcutil.com/colormgt/