Tv tuner + Video player with DX9

[Offler]

I have here some TV stuff so i have been playin with it around...

For few months i was examining problem with low agp utilisation, and some serious conflicts between two video streams...

If the TV tuner application is running on Direct X 9 video renderer (VMR9) and the video player is running on VMR9 too the image is choppy and in some time it can lead to BSOD. This mostly depends on GART driver and its version.

If video player and tv tuner app are running on DX7 renderer (VMR7) video is not affected...

I tried same drivers and apps in Windows 2000. No trouble with rendering occured...

This leads me to an idea that low agp utilization is caused by some subsystem which is not working like in win2k. It could be the gart driver or the DX interface. Problem is surely software based...

Right now i dont have any idea where to find bug and how to fix it...