weird vertical tearing problem

[arch_angel16]

Ok, this is driving me batty.

I just replaced my pc with a new notebook, and on video playback I'm noticing a weird tearing problem whenever there's fast vertical motion. There'll be one or two horizontal lines in the video showing a tear in the image.

My notebook (pertinent details):
1280x800 (16:10) LCD @ 60Hz
Geforce 7600 512mb gfx

My software settings:
XP Home edition
current Gordian Knot codec pack (sans huffyuv or divx3 installs)
VLC player (current version)
Winamp (current version)
Media Player Classic (current version)

All 3 programs generate the video tearing behavior, with different video sources (dvd, h264, wmv). I don't think it's an interlacing problem since the DVD IS interlaced while the h264 encode's progressive)

I had thought it might be related to vsync (tearing effects happen when the video buffer isn't in sync with the monitor) but I've tried enabling it in the nvidia driver & winamp but it doesn't affect the behavior.

I even considered that this might be an effect or behavior of LCD screens, but that doesn't seem to be the case. My old PC was connected to a Sanyo Z2 1280x720 projector (dvi-a cable) and I never noticed this tearing effect on it.

Thoughts, gentlemen?

[reepa]

Try changing the video renderer, if possible. For me, VMR7 (renderless) and VMR9 cause tearing, while Overlay and VMR7 (windowed) work great. At least Media Player Classic lets you change the renderer from Options -> Playback -> Output. I'm sure VLC can do it too.

[arch_angel16]

Update: weird tearing problem goes away...if I output over analog to an LCD Projector. Still happening on the lcd screen on the laptop.