Suspend/resume brightness issue Debian 8 with i965 integrated video controller

[r <ric.romoli@gmail.com>]

Hi, I think I've discovered a bug in the kernel 3.16. The issue is
related to the suspend/resume brightness with i965 integrated video
controller. I discovered the bug was not present in the previous debian
stable kernel 3.2 and is still present in the 4.2 and 4.3 kernel from
backports. I compiled my own 4.4 kernel and now all seems to work. I
also opened a bug request here:

https://bugzilla.kernel.org/show_bug.cgi?id=111621

Hope it can be useful to fix the bug in the current kernel of Jessie. 

Ricca