I'm using a notebook with an external display and (currently) the 302.11 beta drivers. Vsync never worked properly for me, not with this monitor, not with the one I had before, not with older drivers. There's always a screen region where bad, very noticeable tearing happens, no matter if it's in Firefox or a game. I'm actually quite convinced that it's on but not in sync with the display for some reason.
I've messed with TwinView on and off, doesn't help. Forced X to only recognize the external display, no dice. My current relevant configuration:
in my ~/.bashrc
Made an nvidia file in /etc/X11/xorg.conf.d/
#Option "DynamicTwinView" "true"
Option "NoLogo" "true"
Option "DPMS" "1"
Option "OnDemandVBlankInterrupts" "1"
#Option "ConnectedMonitor" "DFP-1"
Option "TripleBuffer" "true"
Anybody got an idea what's causing this? The graphics cards is a GeForce GTX 260M, the external monitor is an Eizo FS2331.