Patent ID: 8300056
Filing Date: 2012-10-30
Classification: G09G

Abstract:
1. An apparatus comprising: a graphics multiplexer (GMUX) to receive mirrored video display streams from a first graphics processing unit (GPU) and a second GPU, wherein the GMUX switches a video display stream sent to a display device from the video display stream from the first GPU to the video display stream from the second GPU, the switching occurring during a blanking interval for the first video display stream that overlaps with a blanking interval for the second video display stream, wherein the GMUX includes a GMUX controller to: determine that the mirrored video display streams for the first GPU and the second GPU do not have an overlapping vertical blanking interval prior to the expiration of a selected vertical blanking interval for the first GPU; cause the video display stream sent to a display device to be held in the selected vertical blanking interval of the first display stream for a length of time longer than the selected vertical blanking interval, wherein causing the video display stream to be held in the selected vertical blanking interval comprises decoupling an output of the GMUX from a next frame of an output of the first GPU; and determine, while the video display stream sent to a display device is being held within the selected vertical blanking interval, that the display stream for the second GPU has entered a vertical blanking interval.