https://bugs.freedesktop.org/show_bug.cgi?id=36602
--- Comment #6 from Alex Deucher agd5f@yahoo.com 2011-05-26 11:03:48 PDT --- The htile buffer needs to be bound for the life of the Z/S buffer(s) to be effective. I just put together a set of patches to allocate the htile buffer in the ddx along with the Z and stencil buffers. It seems to work ok, but I'm not seeing much change in performance. http://people.freedesktop.org/~agd5f/htile/