I have a XFX Radeon 6670 1GB DDR5 @ 800MHz GPU/1000MHz Memory with 3 connectors: mHDMI,DVI,DVI.
I always get stuck at the boot screen with the wheel either spinning or not (depending on Lotus/Ipomoea/Pithecia). The interesting thing is that I can hear a sound from the login area when I try to press Control+F1...function keys.
So the driver gets loaded, but the framebuffer doesn't use the screen that's connected to the DVI.
I cant test the mHDMI connector
The 2nd DVI connector doesn't work at all.
I only need the first DVI, system.log doesn't give any useful info AFAIK.