You can remove xserver-xorg-video-intel package and reboot, but then
no more acceleration. As for me, I will reinstall Ubuntu Studio 12.04.
My system looks shaky with 13.04 (random crash of Gimp, not sure if
it's related to intel driver).
I tried also to install: https://01.org/linuxgraphics/downloads/2013/intelr-linux-graphics-installer-...
Same problem.