brightness control not working

hey everyone my brightness is so high and i can’t dim it so what do i do to fix it?
I don’t have the root password and that means i cant install anything on it so i dont know what do to to fix the brightness bug.
please help me figure this out

from StingRae

Hello and welcome here.

This is probably about a desktop environment, but you do not tell which one. And as every DE may have it’s own way of controling brightness, it will be difficult to help you.

So please: KDE plasma, Gnome, …?

Some basic hardware details may be useful as well. Not having administrator access will limit your options significantly. Assuming inxi is installed, you can get some hardware details using…

inxi -SGMCxx

Boot parameters used by the running kernel…

cat /proc/cmdline