Arch Linux

rel_uctance

Member

Registered: 2021-09-23

Posts: 5

Inverted Brightness Control on AMD Laptop

I've just installed Arch Linux with KDE Plasma desktop installed on my HP Laptop which has an AMD Ryzen 5 5600H & Radeon VEGA 7 Graphics. My brightness control works; however, it's completely inverted. Increasing my brightness levels does the opposite and dims the screen instead. Putting it to 100% brightness just dims it to the lowest possible brightness of my screen. Curiously, the default 0 brightness level isn't the brightest for my screen. It seems to be set to around 50% maximum when at 0 brightness. So my brightness range is around 0-50% but is inverted.

I have xf86-video-amdgpu amd open-source drivers installed. Which I think is the recommended drivers I need for my device given that I have amd integrated graphics.

I've tried multiple utilities to change my brightness like brightnessctl, xrandr, xbacklight, and light but with no luck. Brightness control is definitely inverted, and I don't know what to do.

brightnessctl --list

Available devices:
Device 'amdgpu_bl2' of class 'backlight':
	Current brightness: 0 (0%)
	Max brightness: 255

Device 'input6::numlock' of class 'leds':
	Current brightness: 1 (100%)
	Max brightness: 1

Device 'input4::capslock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input6::scrolllock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input4::scrolllock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input4::numlock' of class 'leds':
	Current brightness: 1 (100%)
	Max brightness: 1

Device 'input6::capslock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

If anyone knows how to fix it, I would greatly appreciate it!