These are the package sources for the xserver-xorg-video-intel package from Ubuntu 13.04 with the "virtual CRTC" patch applied. Just playing around...

The plan is to always maintain a patched version of the one in the official Ubuntu repositories for 13.04.

Install the package on Ubuntu 13.04 (Raring Ringtail) from the corresponding PPA (as root):

add-apt-repository ppa:krlmlr/ppa
apt-get update
apt-get install xserver-xorg-video-intel