https://bugs.freedesktop.org/show_bug.cgi?id=62889
--- Comment #17 from Alexander von Gluck kallisti5@unixzen.com --- I re-updated my Mesa, llvm-amdgpu, libdrm, to mainline and applied the patch to kernel 3.9.0rc3
Now things seem to be in a better state. The patch doesn't seem to provide any change though as I can boot the older 3.8.x kernel and see the same results.
It looks like something changed in Mesa or libdrm for the better.
Oddly enough, after the updates while Gnome 3 loads ok with color tiling, Steam now shows the corruption Gnome once showed.. (see new screenshot attached)
Sorry i'm kind of all over the place with the testing, I had to update Mesa to get X working again.