hi use this simple shader program:
vertex shader
void main() {
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_Position = ftransform();
}
fragment shader
void main() {
uniform sampler2D brush;
\
gl_FragColor = vec4(texture2D(brush, gl_TexCoord[0].xy).xx, 0.0, 0.0);
}
If I comment the texture access in the fragment shader out there is no error but otherwise I get a segmentation fault(0x411d02c0 in _nv000098gl () from /usr/lib/libGLcore.so.1) in the opengl library if I link the shader program. I have written simular shader which are working.
The card is a nv40 with eeh 7676 linux driver.
thanks and regards
marco