(In reply to varval761 from comment #9) > Ok thanks! > > Without setting acpi_backlight, only nvidia_wmi_ec_backlight shows up in > /sys/class/backlight/ > > With acpi_backlight=native, only amdgpu_bl2 shows up in /sys/class/backlight/ And adjusting this didn't change the backlight level? e.g. echo 100 > /sys/class/backlight/amdgpu_bl2/brightness > (This is still on nouveau/amdgpu; will test out proprietary Nvidia soon.)