I have a R9 270x on a Alienware X51 R2. It's a pure AMD card. Not from a manufacturer like ASUS or MSI. I tried every single driver since december. The 13.12 to 14.7 RC. No one works. When I use the default driver (VGA) of Windows, I have no problems. I even tried on OpenSuse, the problem persist. Some person seems to have a solution on MSI card. But what happen if you have a AMD branded card. Like others, the problem happen randomly. One day I can use ONE monitor, no game, no video, only Firefox and it works. At the moment I use TWO monitor, I have a black screen. If I play any game, I have a black screen.
Last chance... I there any CLEAR solution? My next step is to go for nVidia. Wake up AMD.