Thanks for the info OdyX! I DL'ed and installed xserver-xorg-video-intel_2.7.99.901-3_amd64.deb and then installed the xorg-core -3 and restarted just fine. Apelete - I assume once you installed the new intel driver you also installed the -core -3? I would guess since there is a ABI change that driver -3 won't work with -core -2.