Hi, perhaps one of the experts can answer this in a few words... SandyBridge can prevent tearing only by using pageflipping. pageflipping on Xorg always flips the whole framebuffer, so it can only be synced to one output device. The vaapi-enabled MPlayer plays nice in fullscreen mode (via vaapi or gl), but sometimes tears in windowed mode. Is this a MPlayer, Xorg, intel driver or SandyBridge problem? It's clear that pageflipping can not be syncronized to two displays at once, but I see no theoretical need for a video being fullscreen to make use of pageflipping. Thank you for any hints! Greets, Kiste
