[GRASS-dev] Re: [bug #4768] (grass) nviz segfault on startup when

[William Kyngesburye]

I've tried a couple things, and I can think of 2 possibilities:

- since togl demos work, possibly there is something wrong with the  
window NVIZ is trying to setup.  I tried removing the togl  
glXQueryExtension test to force it to assume that glX is OK - it got  
further, but failed later when X11 wanted to test that on its own:

0   libX11.6.dylib                 	0x9b4bdfa1 XQueryExtension + 24
1   libX11.6.dylib                 	0x9b4b4fb1 XInitExtension + 47
2   libXext.6.dylib                	0x9b49aec9 XextAddDisplay + 64
3   libGL.1.dylib                  	0x9b5b9c2a __glXFindDisplay + 116
4   libGL.1.dylib                  	0x9b5ba304 __glXInitialize + 25
5   libGL.1.dylib                  	0x9b5b6b23 GetGLXPrivScreenConfig  
+ 27
6   libGL.1.dylib                  	0x9b5b78a9 glXChooseVisual + 38
7   nviz                           	0x00011a31 Togl_CreateWindow + 1070

I also tried linking in my test installed togl, instead of using the  
included togl in the nviz source - same errors.

- There is something wrong with glX in Apple's X11 that only shows up  
(so far) with NVIZ.  I need to find some OpenGL demos that use glX,  
next.

-----
William Kyngesburye <kyngchaos at kyngchaos.com>
http://www.kyngchaos.com/

"History is an illusion caused by the passage of time, and time is an  
illusion caused by the passage of history."

- Hitchhiker's Guide to the Galaxy