Re: Always Tearing on 8600 GTS
"no sure why xrandr is showing 50Hz???"
That's a known issue with Twinview, check the readme.
Do you run mplayer with "-vo vdpau"? There shouldn't be any tearing with vdpau video output. I'm kind of lost why you're having so many problems. All of my OpenGL games and apps work perfectly fine for the past 3 years with composite extension disabled. What version of the nvidia driver do you run?