Just received my framework 13 a week ago and have already installed the Cinnamon edition of Linux Mint 21.2 "Victoria" and have noticed that I am unable to adjust my screen brightness. With closer inspection using brightnessctl, this is the output:
Device 'phy0-led' of class 'leds':
Current brightness: 1 (100%)
Max brightness: 1
This is my failed attempt using xrandr:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 2256 x 1504, current 2256 x 1504, maximum 2256 x 1504
default connected primary 2256x1504+0+0 0mm x 0mm
2256x1504 95.00*
Any suggestions on how to solve this if it can be?