https://bugzilla.kernel.org/show_bug.cgi?id=58731
--- Comment #3 from Christian König christian.koenig@amd.com 2013-05-24 09:31:53 --- No idea why your kernel ends up like it does, but the firmware isn't loaded from the harddisk.
The RV710_me.bin and RV710_pfp.bin are definitely inside your kernel image, take a look at your dmesg the disk is initialized why after the radeon module.
Looks like your distribution does something to get the RV710_me.bin and RV710_pfp.bin into the kernel, otherwise I can't explain what happens here.
Christian.