XV video tearing on different cards
I have two of Asus GeForce 6600 GT and XVideo running on them with 1.0.8762 with 4 independent X screen, the video quality is good and perfect, I use "NV17 Video Texture" as the XV port.
When I replace them with two Quadro FX 560, with the same configuration, each video on each screen start to have video tearing.
Why changing the cards give me video tearing ? Does that mean video sync implementation is different for Geforce 6600 GT and Quadro FX 560 ?