Information processing apparatus and power supply control method
In standby mode, memory contents are saved to a hard disk. After AC power has been removed by disconnecting the AC plug, when the AC power is restored the data saved on the hard disk is automatically restored into memory to set the power-saving mode back to the standby mode. When the power is turned on next, quick resumption from standby mode can be accomplished.
1. A power supply control method for an information processing apparatus, comprising:
receiving an instruction for entering a hibernation mode by an operating system that is loaded in a volatile storage unit, the hibernation mode saving information stored in a volatile storage unit into the nonvolatile storage unit;
entering the hibernation mode by the operating system based on the instruction for entering the hibernation mode;
keeping power supplied to the volatile storage unit by a basic input/output system and storing information for a device checked by the basic input/output system in the volatile storage unit when the information processing apparatus enters the hibernation mode;
determining if the information for the device checked by the basic input/output system is stored in the volatile storage unit when the information processing apparatus receives an event for starting up the information processing apparatus;
performing a resuming process of the basic input/output system by the basic input/output system based on the information for the device checked by the basic input/output system in the volatile storage unit before the information processing apparatus starts up from the hibernation mode by restoring the saved information in the nonvolatile storage unit into the volatile storage unit by the operating system when the information for the device checked by the basic input/output system is stored in the volatile storage unit.
2. The power supply control method as claimed in claim 1 , wherein the nonvolatile storage unit is a hard disk.
3. An information processing apparatus, comprising:
a volatile storage unit;
a nonvolatile storage unit;
an operating system that is loaded in the volatile storage unit, receives an instruction for entering a hibernation mode in which information stored in the volatile storage unit is saved into the nonvolatile storage unit, and enters the hibernation mode based on the instruction for entering the hibernation mode to shut down the information processing apparatus; and
a basic input/output system that keeps power supplied to the volatile storage unit and stores information for a device checked by the basic input/output system in the volatile storage unit when the information processing apparatus enters the hibernation mode, determines if the information for the device checked by the basic input/output system is stored in the volatile storage unit when the information processing apparatus receives an event for starting up the information processing apparatus, and performs a resuming process of the basic input/output system based on the information for the device checked by the basic input/output system in the volatile storage unit before the information processing apparatus starts up from the hibernation mode by restoring the saved information in the nonvolatile storage unit into the volatile storage unit by the operating system when the information for the device checked by the basic input/output system is stored in the volatile storage unit.
4. The information processing apparatus as claimed in claim 3 , wherein the nonvolatile storage unit is a hard disk.
5. A power supply control method for an information processing apparatus, comprising:
receiving an instruction for entering a hibernation mode by an operating system that is loaded in a volatile storage unit, the hibernation mode saving information stored in a volatile storage unit into the nonvolatile storage unit;
entering the hibernation mode by the operating system based on the instruction for entering the hibernation mode;
keeping power supplied to the volatile storage unit by a basic input/output system and storing information for a resuming process of the basic input/output system in the volatile storage unit when the information processing apparatus enters the hibernation mode;
determining if the information for the resuming process of the basic input/output system is stored in the volatile storage unit when the information processing apparatus receives an event for starting up the information processing apparatus to determine whether peripheral device information is stored in the volatile storage unit;
performing the resuming process of the basic input/output system by the basic input/output system based on the information for the resuming process of the basic input/output system in the volatile storage unit before the information processing apparatus starts up from the hibernation mode by restoring the saved information in the nonvolatile storage unit into the volatile storage unit by the operating system when the information for the resuming process of the basic input/output system is stored in the volatile storage unit.
6. An information processing apparatus, comprising:
a volatile storage unit;
a nonvolatile storage unit;
an operating system that is loaded in the volatile storage unit, receives an instruction for entering a hibernation mode in which information stored in the volatile storage unit is saved into the nonvolatile storage unit, and enters the hibernation mode based on the instruction for entering the hibernation mode to shut down the information processing apparatus; and
a basic input/output system that keeps power supplied to the volatile storage unit and stores information for a resuming process of the basic input/output system in the volatile storage unit when the information processing apparatus enters the hibernation mode, determines if the information for the resuming process of the basic input/output system is stored in the volatile storage unit when the information processing apparatus receives an event for starting up the information processing apparatus to determine whether peripheral device information is stored in the volatile storage unit, and performs the resuming process of the basic input/output system based on the information for the resuming process of the basic input/output system in the volatile storage unit before the information processing apparatus starts up from the hibernation mode by restoring the saved information in the nonvolatile storage unit into the volatile storage unit by the operating system when the information for the resuming process of the basic input/output system is stored in the volatile storage unit.