I have recently switched a refurbished laptop "acer nitro 5" from win11 to zorin os 17.2 but since then the fn+leftarrow (screen brightness down shortcut) doesn't work when it worked on win 11 and now its stuck at max brightness and its painful to look at (literally, very light sensetive) and i have tried all the things in the app store, xrandr, xdotool, but nothing works, its like the system thinks the screen doesnt exist or something. im really confused why theres no settings for it in the display settings aswell.
im looking for a harware brightness change and im not very tech savvy if you could keep things simple itd be much appreciated.
A Yandere ... So, we must careful what we do and say? Hahaha!
xrandr does only work on Xorg. So, does Your System run in Wayland or Xorg? To check that, go to Settings>About and look if there stands Wayland or X11. If there stands Wayland, try it with switching to X11/Xorg.
to do that, go to the Login Screen (not the Lock Screen). simply reboot for that. On the Login Screen click on Your Profile so that the Password Field appears. It has to be appeared. When it is appeared, You should see in the bottom right Corner a Gear Icon. Click on it and choose the Option ''Zorin Desktop on Xorg'' and then log in.
Then You could check first if Your Keys maybe work again. If not, You could use xrandr.