Abstract: According to one embodiment, an information processing apparatus includes first and second devices that are interconnected via a communication path, each of the first and second devices having a communication path control function for transitioning a state of the communication path between an active state and a standby state, based on whether the communication path is in an idle state or not, a unit that switches an operation mode of the apparatus between a first mode in which priority is placed on performance and a second mode in which priority is placed on power saving, and a unit that permits execution of the communication path control function in a case where the operation mode is switched from the first mode to the second mode, and prohibits execution of the communication path control function in a case where the operation mode is switched from the second mode to the first mode.

Abstract: According to a state control method used for an information processing apparatus of the present invention, an OS transits each device state of predetermined devices configuring the system of a computer to a state D3. Devices capable of transiting to D3hot are transited to a state D3hot, on the other hand, devices incapable of transiting to D3hot are transited to a state D3cold. A system BIOS determines that an AC adapter is in a connected state. If a device transiting to the state D3cold exists, the system BIOS initializes the devices of state D3cold to transit them to a state D0. Thereafter, the system BIOS transits the state of a CPU to a state Cx.

Abstract: According to one embodiment, an information processing apparatus includes first and second devices that are interconnected via a communication path, each of the first and second devices having a communication path control function for transitioning a state of the communication path between an active state and a standby state, based on whether the communication path is in an idle state or not, a unit that switches an operation mode of the apparatus between a first mode in which priority is placed on performance and a second mode in which priority is placed on power saving, and a unit that permits execution of the communication path control function in a case where the operation mode is switched from the first mode to the second mode, and prohibits execution of the communication path control function in a case where the operation mode is switched from the second mode to the first mode.

Abstract: This invention relates to an electronic device including a lock switch which defines activation permission of the power supply of the electronic device, and a unit which receives an activation instruction from software and invalidates the received activation instruction when the lock switch permits activation.