Comment 11 for bug 764650

tully - you have different hardware with a different driver so you should file a new bug. However your issue may be fixed by the upcoming xserver-xorg-video-intel 2.16.0 driver - see http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/ and https://bugs.freedesktop.org/show_bug.cgi?id=37700