I get tearing on fullscreen video when unredirect fullscreen windows is on with ivybridge :/
Windows does the same thing, fullscreen games can totally bypass aero. Compare a game in borderless windowed mode to one in fullscreen. In borderless windowed mode you get no tearing due to aero, but at a potential performance hit, fullscreen you get tearing unless you enable in game vsync.
Originally Posted by ElderSnake