Patent ID: 7707439

Claim:
An information processing apparatus including a first bus connected a first bus device, a second bus connected to a second bus device, and a first bus bridge connecting the first bus and the second bus, comprising: a third bus connected to a third bus device; a second bus bridge connecting the first bus and the third bus; a power control unit configured to control electric power supplied to the information processing apparatus, which supplies electric power to the first bus device and the first bus bridge when the information processing apparatus is in an operative state, and stops power supply to the first bus device and the first bus bridge when the information processing apparatus is in a power saving state; a first transmission control unit configured to control transmission of a recovery signal which is entered from the second bus device and transmitted to the power control unit to return the information processing apparatus from the power saving state to the operative state, when the information processing apparatus is in the power saving state; and a second transmission control unit configured to control transmission of a recovery signal which is entered from the third bus device and transmitted to the power control unit when the information processing apparatus is in the power saving state, wherein the power control unit resumes the power supply to the first bus device and the first bus bridge in response to the recovery signal transmitted by the first transmission control unit, and the power control unit resumes power supply to the first bus device and the first bus bridge in response to the recovery signal transmitted by the second transmission control unit.