https://bugs.freedesktop.org/show_bug.cgi?id=62959
--- Comment #41 from Alexandre Demers alexandre.f.demers@gmail.com --- (In reply to comment #40)
in /etc/environment I have R600_DEBUG=nodma ever since discovering that setting, i.e.: also now the R6))_DEBUG is set to nodma.
I did not apply any of your patches over the 3.9.0-rc7 kernel.
If I was you, I would test without R600_DEBUG=nodma to see if there is any difference between kernels 3.8 and 3.9. I would also try patching 3.9-rc7 with attachment 77608 or attachment.