I start a new topic from the one from gazzacbr since it's solved (http://www.insanelym...-8#entry2008724).
I have an Alienware M17X R4 and with 10.9.1 I can have full acceleration on a VGA display but nothing on internal monitor (120Hz connected with display port). With 10.9.2 nothing is working.
I put a ioreg export in attached file.
I know AREOS find a way with efi string to tell driver the good port to use.
If you have any solution, I will take it.