This option forces X to perform all rendering to a backbuffer prior to updating the actual display. Option "TearFree" "boolean": disable or enable TearFree updates. Most systems use multiple buffering and some means of synchronization of display and video memory refresh cycles. The most common solution is to use multiple buffering. Ways to prevent video tearing depend on the display device and video card technology, software in use, and the nature of the video material. Screen tearing is less noticeable when more than two frames finish rendering during the same refresh interval since that means the screen has several narrower tears, instead of a single wider one. Tearing can occur with most common display technologies and video cards, and is most noticeable in horizontally-moving visuals, such as in slow camera pans in a movie, or classic side-scrolling video games. During video motion, screen tearing creates a torn look as edges of objects (such as a wall or a tree) fail to line up. It can also occur simply from lack of synchronization between two equal frame rates, and the tear line is then at a fixed location that corresponds to the phase difference. That can be caused by non-matching refresh rates, and the tear line then moves as the phase difference changes (with speed proportional to difference of frame rates). The artifact occurs when the video feed to the device is not synchronized with the display's refresh rate. Screen tearing is a visual artifact in video display where a display device shows information from multiple frames in a single screen draw. A typical video tearing artifact (simulated image)
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