https://bugs.freedesktop.org/show_bug.cgi?id=73378
--- Comment #6 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #5)
also, suspend and resume does not work with 3.13 and 3.14 but works with 3.12 but I haz no clue if this has anything to do with radeon but those errors ^^ are present in this bug & latest kernels.
Can you bisect?