Computer apparatus, power supply control method and program for reducing the standby power requirement in a computer supporting a wake-up function
AssigneeLenovo (Singapore) Pte. Ltd.
InventorsMikio Hagiwara, Shigefumi Odaohhara, Mitsuhiro Yamazaki
Life of this patent
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Abstract
In general, the present invention provides a computer apparatus, power supply control method and program for reducing the standby power requirements in a computer supporting a wake-up function. The present invention reduces standby power requirements on power off by three types of control: a wake-up function being set by a user, existence of a device actually capable of realizing the wake-up function, and supplying the power from the auxiliary source only to the device capable of realizing the wake-up function.
Claims16
A computer apparatus comprising:
- a function setup means for enabling or disabling a wake-up function to start up a system by operation from a remote site;
- a storage means for storing information on being enabled or disabled set by said function setup means;
- a confirmation means for confirming said information on being enabled or disabled stored in said storage means upon receiving a request for system shutdown;
- a determination means that determines whether or not the at least one device is able to realize the wake-up function;
- and
- a power off means for supplying power from an auxiliary source to at least one device which may realize the wake-up function if said confirmation means determines that said wake-up function is enabled and for executing power off of the system by terminating power supply to the device from the auxiliary source if determined that said wake-up function is disabled, and wherein said power off means executes the power off of said system by terminating the power supply from said auxiliary source when determined by said determination means that there is no at least one device being able to realize said wake-up function.
A computer apparatus capable of receiving a device being able to realize a wake-up function, comprising:
- a wake-up power source for supplying power for wake-up to a plurality of connected devices on power-of;
- a determination means for determining whether or not at least one of the plurality of devices is able to realize said wake-up function;
- and
- a controlling means for controlling power supply from said wake-up power source, the controlling means configured to turn off wake-up power source power to the plurality of connected devices where the determination means determines that no device being able to realize said wake-up function is included in the plurality of connected devices.
A power supply control method of supplying power for wake-up for realizing a wake-up function to a predetermined device on power off, comprising the steps of:
- supplying on power off said power for wake-up to a first device of a plurality of connected devices when the first device is predetermined as able to realize the wake-up function;
- and
- performing control not to supply said power for wake-up to a second device of the plurality of connected devices when the second device is predetermined as unable to realize the wake-up function on power off.
An article of manufacture comprising a computer usable medium having a computer readable program embodied in said medium, wherein the computer readable program, when executed on a computer, causes the computer to execute the procedures of:
- storing setup information on a wake-up function being enabled or disabled;
- determining whether or not a connected device is able to realize a wake-up function;
- if said wake-up function is set to be enabled according to said stored setup information and it is determined tat the connected device is able to realize said wake-up function, then maintaining power supply to the connected device from an auxiliary source on power off;
- and
- if said wake-up function is set to be disabled according to said stored setup information or it is determined that the connected device is not able to realize said wake-up function, then stopping the power supply to said connected device from said auxiliary source on power off.
An article of manufacture comprising a computer storage medium having a computer readable program embodied in said medium, wherein the computer readable program, when executed on a computer, causes the computer to execute the procedures of:
- as to a plurality of devices connected to a computer system, determining whether or not each of the plurality of devices is able to realize a wake-up function;
- maintaining supply of power for wake-up from an auxiliary source to each of at least one first device of the plurality of devices determined as able to realize the wake-up function on power off;
- and
- stopping the supply of power for wake-up from said auxiliary source to each of at least one second device of the plurality of devices determined as unable to realize the wake-up function on power off.
Dependencies are inferred from the claim text.