Brightness Keys

[penglezos]

Might need more than one reboot.
Also, when you use the F-keys, the Fn key should be pressed down continuously while you repeatedly & gently tap the F5 or F6 key until you get the brightness level you want.

Failing the above, add "Linux" to the GRUB_CMDLINE I mentioned in post#4, so that it reads:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"

Might be a longshot, but it worked in Manjaro.

Dear m654321, thanks for your great input but unfortunately none of your methods worked for me!