https://bugs.freedesktop.org/show_bug.cgi?id=54338
--- Comment #3 from Alex Deucher agd5f@yahoo.com 2012-09-04 03:45:58 UTC --- (In reply to comment #2)
No, I'm just trying various kernel versions to get my card working. However, I just tried Fedora 17 live CD (kernel 3.3) and there radeon module loaded normally.
Can you attach the dmesg from the working boot?
So, I have to compare two linux kernel versions — 3.3 and 3.5.3 ?
you might want to test 3.4 or even some early 3.5 kernels to see if you can narrow it down further. At that point you can use git to bisect and find what commit broke things.