Description of problem: radeonhd does not support kernel modesetting (KMS). Upstream will not add KMS support anytime soon. Version-Release number of selected component (if applicable): All radeonhd version up to at least 1.3.0
radeonhd does not support KMS. Therefore (starting from xorg-x11-drv-radeonhd-1.3.0-4.2.20091204git), radeonhd refuses to start when KMS is active. If you want KMS, use the radeon driver from the xorg-x11-drv-ati package which is loaded by default on Fedora. If you want radeonhd, disable KMS.
*** Bug 476086 has been marked as a duplicate of this bug. ***