https://bugs.freedesktop.org/show_bug.cgi?id=63935
--- Comment #18 from Dave Witbrodt dawitbro@sbcglobal.net --- (In reply to comment #17)
Make sure you have the updated RLC ucode in addition to the UVD ucode. Unfortunately, I can't reproduce this on the UEFI systems I have access to.
Benjamin and Parag have already indicated which firmware versions they are using, and I feel it's safe to assume that Christian is also using the proper versions as well.
I see that I have forgotten to list my versions: the *_rlc.bin (and *_uvd.bin) files I use were listed in comment 9, and all 4 of them are dated Apr. 2, 2013. They were obtained from
http://people.freedesktop.org/~agd5f/radeon_ucode
on Apr. 28.