I believe you, but can you show me how to reproduce this?  I would think 
that running a test program such as:

http://www.opengl.org/wiki/Tutorial:_OpenGL_3.0_Context_Creation_%28GLX%29

with VGL_READBACK=pbo would repro it, but no such luck.

Reproducing the problem is important, because otherwise I can't tell 
whether or not I've fixed it.


On 8/22/12 7:24 PM, Antony Riakiotakis wrote:
> Hi,
>
> When creating a core OpenGL 3.x+ profile using bumblebee, the new
> context fails when passing
> through server/pdrawable.cpp line 264. The check fails on a core profile
> 3.x+ context because the extension does not exist for such profiles (It
> is considered core functionality, not an extension). At least NVIDIA
> drivers do not advertise this as an extension. You should consider this
> extension as supported on OpenGL contexts with version > 3.0. In fact,
> for such contexts using glGetString(GL_EXTENSIONS) to check for
> extensions is considered an error. You should use glGetStringi instead.
>
> Thanks,
>
> Antony Riakiotakis

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