https://bugzilla.kernel.org/show_bug.cgi?id=203905
--- Comment #6 from Sandor Ecker (esanya@freemail.hu) --- So it seems that the 16 bit actual_brightness is not a bug, but a feature... :)
https://github.com/torvalds/linux/commit/262485a50fd4532a8d71165190adc7a0a19...
So my question now: -why are the max_brightness and brightness values in 8bit range?