If you guys are on Ubuntu 14.04, DON'T INSTALL latest Intel Linux Graphic Driver (2014Q2)!!!

I do only recommend a fresh install of Ubuntu 14.04 and install fglrx ONLY!

That's because Intel Linux Graphic Installer Driver 2014Q2 upgrades Linux Kernel to 3.15 and Xserver to 1.15.1 and fglrx doesn't run with those versions