When using DrawTransformFeedback on a GTX460 [Win7 64bit, OpenGL 3.3, latest release driver, up to the latest beta driver (260.93)] nothing is drawn but GL_INVALID_OPERATION is generated.
According to the spec GL_INVALID_OPERATION is only generated if EndTransformFeedback has not been called before, while the TFO was bound. But that’s what I actually do.
Unfortunately I don’t have another nVidia card to test the code, but on a Radeon 3850 it works as expected. So I assume that it is a driver-bug.
It may very well be the same problem as reported by MaB here: NVidia - transform feedback issue ???
I’d really like to submit a bug report, but from what I’ve found on nVidia’s webpage, the only way to do so is by registering as a developer. I tried to do so, but after submitting the application-form only a blank page was returned by the server. I sent an E-mail to firstname.lastname@example.org afterward to ask if my application actually found its way into their system, so they could process it, but without luck. No response to my E-mail in over one week.
Is there any other way to submit a bug report?
Thanks for any advice.