https://bugs.freedesktop.org/show_bug.cgi?id=73418
--- Comment #7 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #6)
(In reply to comment #5)
Does this patch help?
Yes, this seems to do the trick. But as it's a work-around I'm unsure about closing this as fixed.
I don't think it's a workaround, I think it's actually the way the hw is supposed to be programmed for compute.