hi Everybody .

brightness is not working after I upgraded to the latest stable version . the screen it too dim and the hot keys do not work in fact it goes totally dark when I touch any of them.

it used to work on kernel 3.14 .

here are my specs :

lenovo ideapad z500 i7.

Gpu intel graphics HD 4000 with dedicated Nvidia (just did a fresh install so i haven't installed any nvidia driver, and i'm not new to linux tried some fixes from other distros but nothing)
Release 1.1.0 (moto) 64-bit
Kernel Linux 3.18.0-kali3-amd64