There does appear to be a work around here: https://wiki.archlinux.org/index.php/HP_Spectre_x360_13-4231ng#Brightness_/_backlight
It requires bc and inotify-tools. The workaround is for a long running program to listen for changes to /sys/class/backlight/intel_backlight calculate the right luminance value write them to xrandr. Here's a slight improvement to the suggested script: #!/bin/bash #----------------------------------------------------------------- # /usr/local/bin/brightness # be sure this file is executable #----------------------------------------------------------------- backlight_path=/sys/class/backlight/intel_backlight device=`xrandr | grep -w connected | awk '{ print $1 }'` luminance() { read -r level < "$backlight_path"/actual_brightness bc <<< "scale=10;$level/$max" } read -r max < "$backlight_path"/max_brightness xrandr --output "$device" --brightness "$(luminance)" inotifywait -me modify --format '' "$backlight_path"/actual_brightness | while read; do echo "$device" $(luminance) xrandr --output "$device" --brightness "$(luminance)" done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1831587 Title: brightness control not work with OLED panel To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1831587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs