Patent ID: 7886136
Filing Date: 2011-02-08
Classification: G06F

Abstract:
1. An operating system switching method in a computer system having at least two operating systems, the operating system switching method comprising: receiving a command of switching a first operating system that is currently running to a second operating system; causing the computer system to make a transition to a different low-power sleeping state in response to the command and according to whether a storing of information on an environment of the first operating system is performed; and booting the computer system using the second operating system, wherein the operating system switching includes storing power management state information and the stored operating system switching information to maintain storage of the stored power management state information and stored operating system switching information in a storage when power to the computer is turned off, and wherein a switching module, implemented with a device that operates by a power source that does not operate the computer system, sets variables indicating the power management state information and the operating system switching information, the values set to the variables being maintained when power to the computer is turned off.