Question about support for OpenGL 3.2 Core context

Noob question incoming... I have an application that requests a 3.2 core
context from Mesa.  I tell folks to make sure they have mesa version 10.6.5
or later which I thought supported OpenGL 3.2.  Usually this works but now
and then I get users who's Mesa (including version 11) fails to provide a
3.2 Core context. I tell them to set

MESA_GL_VERSION_OVERRIDE=3.2

and

MESA_GLSL_VERSION_OVERRIDE=150 (or something like that)

and it generally works. But I'm not sure why the original request for 3.2
Core is failing on some systems (drivers?).  Looking at

http://mesamatrix.net/

leads me to think that all drivers with a recent mesa should be fine with
3.2 Core but obviously I am missing something. Do I need to be telling them
to use a specific driver? Is there a list of drivers that do not support
3.2 I should tell them to avoid? Anything else come to mind?

I just want to try to provide a bit more help to folks to get them up and
running with Mesa and even better get our code to handle it automatically
if we could.

Any pointers appreciated. The application is vtk.

Thanks
Ken







-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

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