Description of problem:
Test Day:2009-09-09 Radeon 

Run the live image for the test day, but cannot start xserver after plymouth, it ends with blank black screen. If add radeon.modeset=1 in the kernel parameter, boot shows the same status.


Version-Release number of selected component (if applicable):
http://mclasen.fedorapeople.org/livecd-fedora-livecd-desktop-200909072315-i686.iso
http://mclasen.fedorapeople.org/livecd-fedora-livecd-desktop-200909072231-x86_64.iso

How reproducible:
100%

Steps to Reproduce:
1.boot the live image
(2.add radeon.modeset=1)
3.failed to start x server.
  
Actual results:
failed to start x server.

Expected results:
boot normally

Additional info:
if add radeon.modeset=0, for i386, X server can start normally. But for x86_64, though X server can start, the keyboard and mouth don't work after that.