Hello Ian,

On Sun, Aug 21, 2011 at 12:42 PM, Alejandro Segovia <asegovi@gmail.com> wrote:
Hi Ian,

Ah, the driver might be where the difference is. I am using PyOpenGL 3.0.1 but I'm on a Mac, so I'm not using the NVIDIA drivers at all.Best,

I sent a bug report to NVIDIA, but evidently I have to be a registered developer to submit anything so technical.  I started the application process, so hopefully they'll be able to get the report in a few days.  Let me know how your tests go,

Sorry for the delay, I was really busy last week. I tried the script on Linux and, much to my surprise, I still can't reproduce the problem you describe.

I initially get a red quad and then I can turn on and off the white quad without any issues.

This is my system configuration, I'm on Fedora 12 x86_64:

>>> glGetString(GL_VERSION)
'4.0.0 NVIDIA 256.44'

>>> glGetString(GL_RENDERER)
'GeForce GTX 465/PCI/SSE2'

>>> glGetString(GL_VENDOR)
'NVIDIA Corporation'

I'm starting to wonder whether this could be a Windows-specific issue.

Well, I've finally took some time to try this on Windows. Unfortunately, I still can't reproduce the symptoms!

This is my system configuration:

>>> glGetString(GL_VERSION)
'4.1.0'

>>> glGetString(GL_RENDERER)
'GeForce GTX 465/PCI/SSE2'

>>> glGetString(GL_VENDOR)
'NVIDIA Corporation'

I'm on a 64-bit Windows 7 (Professional).

Is there anything I might be missing? Did you get any kind of reply from NVIDIA?

I've read about them releasing OpenGL 4.2-capable drivers. Have you tried those?

Best regards,
Alejandro.-

--
http://alejandrosegovia.net