Perhaps you're conflating juddering and tearing? - they are distinct. Judder is what you see with, for example, low-fps panning, but tearing is where one segmen

Perhaps you're conflating juddering and tearing? - they are distinct. Judder is what you see with, for example, low-fps panning, but tearing is where one segment of the screen (usually a horizontal strip) is out of sync, still displaying the previous frame, while the rest of the screen has moved on. This is not normal on a correctly configured system.