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Any atempt to change the brightness fails. Using the GNOME UI or the FN keys will update data in /sys/class/backlight/amdgpu_bl0/brightness but the actual brightness of the screen will always be 100%
Device
Lenovo IdeaPad Gaming 3 15ARH05
System specs
CPU: AMD Ryzen 5 4600H with Radeon Graphics (12)
GPU: AMD ATI 05:00.0 Renoir
GPU: NVIDIA GeForce GTX 1650 Ti Mobile
Aditional data
/sys/class/backlight/amdgpu_bl0/max_brightness => 255
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I have tryed already all 4 parameters and none of them worked
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I am experiencing the same on my Dell M7760
I am using xrandr like the following to control it:
xrandr --output DP-4 --brightness .5
For the stock Ubuntu that came on this system the brightness keys seemed to work. I am going to try making a separate Ubuntu install to check how that works
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