Pbo works with ATI but not nvidia
I have a project (vs 2010, windows 7 64bit, application is 32 bit, qt 4.8.0) where I use pbo's to update textures from video sources. The code works fine with all the ATI cards I've used, but fails with all 3 different nvidia cards (8800 GT, 275 GTX, 570 GTX) that I've tried. With the ATI cards the textures are updated and displayed as expected. With the nvidia cards the textures are created originally but not updated via the pbo. When I go back to using regular gltexsubimage with a buffer pointer, everything works fine.
Any suggestions on troubleshooting this?