https://bugs.freedesktop.org/show_bug.cgi?id=66738

--- Comment #12 from lh jarryson@gmail.com --- (In reply to comment #11)

Are you running the same userspace stack with both kernel 3.9 and kernel 3.10/3.11? If so, it sounds like this is UVD related.

Yes, I have two kernels: arch official kernel 3.9.9 and kernel 3.11-rc4(https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git) which compiled myself.

3.9.9 was quiet stable here.