Same problem with i7-2600, DH67CL. DVI-HDMI interface to screen.
(older driver ok, latest not ok)
I have issues with this driver and Clarkdale where it will boot just fine without AVR as a HDMI repeater and straight to TV but to the Epson 8350 projector it just says not supported and does nothing. Previous driver version worked perfectly.
There are numerous threads based on the same issue. I myself have the same problem. I trust intel will look into this.
Whats the bet they released the driver after only using a DVI output source when testing and forgot all about HDMI? I think so