https://bugs.freedesktop.org/show_bug.cgi?id=39119
--- Comment #2 from Adam Rak adam.rak@streamnovation.com 2011-07-10 14:33:37 PDT --- If I set the pixel shader part (lower 16 bits) of the register to 0x1000 in my code, than it works perfectly with X, so this patch should work, but what about mesa?