Re: 1920x1200 video playback performance
I use compiz but only one screen. In NVidia settings I have "sync to XV" checked, so probably meaning it is enabled. I disabled it to see if that made a difference but it didn't.
When I said banding effect what I mean is that vertical chunks of video (usually about 1 inch in height on the screen) are at times displayed with a slight delay, which creates like a flickering effect. It is as if the video cannot be displayed at full speed at the required refresh rate. The limit in my opinion can only be the Linux driver performance or a related setting.