vsync and screen tearing ATI/Nvidia

[millusions]

hi,

has anyone dealt with Ati/nvidia drivers and screen tearing?
have Plex on my media servers connected to a large Sony Tv, seeing a fair bit of screen tearing on media playback. Ati 5570 1gb video card..
also on my laptop, tearing with nvidia m8700


OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 8700M GT/PCIe/SSE2
OpenGL version string: 3.3.0 NVIDIA 340.32
OpenGL shading language version string: 3.30 NVIDIA via Cg compiler
Driver: NVIDIA
Driver version: 340.32
GPU class: G80/G90
OpenGL version: 3.3
GLSL version: 3.30
X server version: 1.14.3
Linux kernel version: 3.11.10
Direct rendering: yes
Requires strict binding: no
GLSL shaders: yes
Texture NPOT support: yes
Virtual Machine: no

[otisklt]

Seems like only with default video drivers do I see it.