xf86QueryLargestOffscreenLinear

[Levent Yavas]

i'm utah-glx nvidia driver maintainer.

in utah-glx i get available video memory with 
xf86QueryLargestOffscreenLinear() then allocate z buffer and texture 
memory for glx usage. after i switched to xorg-6.7.0, 
xf86QueryLargestOffscreenLinear() start to
return 0 instead of available video memory.

i use it as:
xf86QueryLargestOffscreenLinear(pScreen, &numpixels, 32, PRIORITY_EXTREME);

my questions are what causes this problem and how can i fix it?

regards
Levent YAVAS