Ubuntu – Change brightness on Asus laptop

I believe it's a big question among asus users, cause i've found tons of questions about "why do my backlight don't change with fn keys??".

Well… after to much researching and testing (I'm a linux noob btw :P), I found that the Fn keys change the value of the file /sys/class/backlight/asus_laptop/brightness. But, to change correctly the brightness, the file /sys/class/backlight/intel_backlight/brightness must be changed.

I even created a script to change it through bash, works alright and stuff… i just type ./brightness 50, where 50 means the % of the maximum brightness… but i still miss my Fn keys, for God's sake!!

Then I tried to simply change the symlinks that redirects the folders (asus_laptop and intel_backlight are symlinks to very opposed directions), but not even sudo was capable to change these symlinks…

In resume, I'm asking help to re-enable my Fn keys to work with the backlight brightness.

Thanks!