hi all , i'm new here and looking for help with my old machine HP 8440P 
 
	I could successfully install El Capitan on it and it works nearly perfect , sadly i can't manage to fix the brightness and battery indicator on it plus sleeping 
 
	is there anyone who still own such an old device and managed to solve those issues .. ? 
 
	with some googling it seems at least the brightness and battery are solvable yet what i found was sadly very old stuff and inactive topics to be useful