I have a Dell Presicion M4700 laptop with an AMD FirePro M4000. I'm using Fedora 20 and I can't get my card working. I'm forced to use xorg-x11-drv-vesa which is a big drawback (e.g. I can't recover X server after a suspend).
Why don't you have support for this videocard on Fedora 20 (having support for other amd cards)?. This is completely annoying.