https://bugs.freedesktop.org/show_bug.cgi?id=34462
--- Comment #1 from Alex Deucher agd5f@yahoo.com 2011-02-18 14:29:18 PST --- Make sure you have the firmware in your initrd if you are using modules, or built into the kernel if you built radeon into the kernel rather than as a module. See the "Troubleshooting Extra Firmware" section of this page: http://wiki.x.org/wiki/radeonBuildHowTo