Re: Possible PyOpenGL Material/Shader/Display List Bug

On Mon, Aug 29, 2011 at 8:32 PM, Alejandro Segovia <[email protected]>wrote:

> Hello Ian,
>
> On Sun, Aug 21, 2011 at 12:42 PM, Alejandro Segovia <[email protected]>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?
>
Well, I'm on 32-bit, and I have a different GPU.  I think it must be a
particular combination of my GPU and my driver that's causing the issue.

> Did you get any kind of reply from NVIDIA?
>
Sadly no.  I think I shall have to go yell at them again.

>
> I've read about them releasing OpenGL 4.2-capable drivers. Have you tried
> those?
>
The only ones I'd tried are 275.33, 266.58, and 280.26.

I wonder if this is a PyOpenGL problem.  Even though it seems like a
hardware issue, perhaps there's something underlying that's causing the
issue?  I'll see about writing a small C++ test.

Thanks for checking!
Ian

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