> Does this happen with particular pictures or randomly?

I haven't tried to reproduce it yet, I will try to find the time for it.

> It might be worth getting the PITCAIRN_mc2.bin microcode and trying a 3.15 kernel.

I guess once I've managed to reproduce it, otherwise we don't know if it fixes
anything.

PITCAIRN_mc2.bin will be included with the kernel 3.15 firmware package right?