sudo apt-get -t wheezy-backports install xserver-xorg-video-intel
sudo apt-get install libva1 libva-intel-vaapi-driver vainfo
[ 7.527] (II) Module intel: vendor="X.Org Foundation"
[ 7.527] compiled for 1.12.3.902, module version = 2.19.0
[ 7.527] Module class: X.Org Video Driver
[ 7.527] ABI class: X.Org Video Driver, version 12.1