Patent ID: 9158367
Filing Date: 2015-10-13
Classification: G06F,G06T,G09G,Y02D

Abstract:
1. A method for driving a display in a computer, comprising: switching from using a first graphics process unit (GPU) to drive the display to using a second GPU to drive the display; transitioning the first GPU into a low-power state subsequent to the switching, wherein transitioning the first GPU into the low-power state comprises powering off the first GPU and an interface with the first GPU, and maintaining power to a video memory of the first GPU; prior to transitioning the first GPU into the low-power state, saving a GPU configuration state of the first GPU in the video memory in the first GPU; detecting that the first GPU is to drive the display subsequent to transitioning the first GPU to the low-power state; powering on the first GPU responsive to the detecting; restoring the GPU configuration state from the video memory subsequent to the powering on; and driving the display with the first GPU subsequent to the restoring.