Originally Posted by agapez
If the brightness is already on max when running on battery, it won't increase if you plug in the charger. If the lumination settings are below max then the brightness goes up to max when you plug in the AC (as it did with the older bios).
Edit: Scratch that, I'm an idiot. The plug I was connected to had no power, so that's why the brightness wasn't going up. I tried a different plug and it worked fine.