--- Comment #19 from Antony J.R email@example.com --- (In reply to Takashi Iwai from comment #18)
Thanks. It shows that aux is used for the backlight control, and the values set there look OK through a quick glance. While you tested the brightness, it didn't change actually, right?
Could you try to read the current brightness, and check the kernel log, too?
Sorry for the late reply, the updated log is here => https://github.com/antony-jr/lenovo-legion5-15arh05-scripts/blob/main/AMDGPU...
I changed the brightness and did cat /sys/class/backlight/amdgpu_bl1/brightness and /sys/class/backlight/amdgpu_bl1/actual_brightness
Here the brightness changed when changed the brightness but actual_brightness is stuck at 311 constantly.
The kernel log also shows that the get brightness routine output is stuck at invalid values.