GLX_EXT_texture_from_pixmap working on GeForce 8800 but not on i965

[drago01]

Mirco Müller wrote:
> Greetings everybody!
>
> 	While trying to get gtk-gl-offscreen-1 working on something different
> than a GeForce 8800 driven by nvidia's proprietary driver I ran into
> problems on the i965 (using the driver that comes with Ubuntu 7.10).
>
> 	Initially I did not assume having any problems with this as I have
> compiz, which is using GLX_EXT_texture_from_pixmap, running successfully
> on both systems (stock Ubuntu 7.10, nothing from Xorg git installed).
>  
> 	In order to understand the involved parts better I wrote a pure X11/GLX
> program (see attached tarball and screenshot).
>
> 	This program works on the nvidia-system but not on the intel one. But
> on the nvidia-system it only works correctly and allows resizing when
> run under metacity. Under compiz I get a white window. As soon as I try
> to resize the window, while running under compiz, I get a BadAlloc-error
> ("insufficient resources for operation") for glXCreatePixmap() and the
> program exits.
>
> 	Another odd observations is the value I get back from
> glXGetFBConfigAttrib() when querying for the attribute
> GLX_BIND_TO_TEXTURE_TARGETS_EXT. What I get back is 0x000020DF (oddly
> enough this is also the value of GLX_FRONT_RIGHT_EXT defined in
> GL/glxext.h). Although I would expect any bit-wise combination of...
>
> 	#define GLX_TEXTURE_1D_BIT_EXT        0x00000001
> 	#define GLX_TEXTURE_2D_BIT_EXT        0x00000002
> 	#define GLX_TEXTURE_RECTANGLE_BIT_EXT 0x00000004
>
> 	On the intel-system I just get 0x00000000 for every FBconfig I tried,
> which is also a bit strange as it would mean that no texture-target is
> supported for GLX_EXT_texture_from_pixmap.
>
> 	To add to my confusion is the fact that glXGetFBConfigAttrib() is meant
> to be supported only if GLX 1.3 or better is available. But on the i965
> only GLX 1.2 is reported, but all the GLXFBConfig-related calls work.
>
> Any help on this issue is much appreciated!
>   
have you tryed setting LIBGL_ALWAYS_INDIRECT=1 before starting your app?