Method and system for information handling system component power management sequencing
A power consumption manager and a power manager sequencer coordinate transition of information handling system components between active and inactive states to manage information handling system power consumption. The power manager transitions components to an inactive state upon a determination of inactivity and then shuts down, for instance by operating as a module in the BIOS. Activation of an I/O device, such as the power switch, restores the power manager to an active state to allow recovery of the information handling system to an operational status. The power manager sequencer detects activation of the I/O device to restore selected components to an active state substantially simultaneous with the power manager so that the selected components have power to accept recovery instructions from the power manager. For instance, a network interface controller receives power to recover from an inactive state before the BIOS sends a PCI bus reset command.
1. An information handling system comprising:
plural information processing components operational to process information;
a power management module operational to selectively power down and recover one or more information processing components to manage power consumption;
a power management sequencer interfaced with the power management module and one or more of the information processing components, the power management sequencer having a switch operational to apply power to initiate power up of the one or more information processing components before communication of predetermined information from the power management module to the one or more information processing components; and
wherein the power management module recovers the one or more information processing components from a power down state upon detection of a user input, and wherein the power management sequencer switch supplies power to the one or more information processing components upon detection of the user input.
2. The information handling system of claim 1 wherein the power management module comprises the BIOS.
3. The information handling system of claim 1 wherein the one or more information processing components having power initiated by the power management sequencer comprises a network interface controller.
4. The information handling system of claim 3 wherein the power management sequencer is further operational to initiate power to the network interface controller before communication of a PCI reset command to recover from a power down state.
5. The information handling system of claim 1 wherein the user input comprises activation of a power switch.
6. The information handling system of claim 5 wherein the power management sequencer comprises a transistor interfaced with the one or more information processing components and operational to gate power to the information processing component upon activation of the power switch.
7. A method for sequencing power to information handling system components during power management, the method comprising:
transitioning the information handling system components to an inactive state with a power management module;
transitioning the power management module to an inactive state;
detecting a power switch input to recover to an active state;
transitioning the power management module to an active state based on the detected input;
transitioning selected information handling system components to an active state based on the detected input; and
transitioning remaining inactive information handling system components to an active state with the power management module.
8. The method of claim 7 further comprising sending predetermined information to the selected information handling system components from the power management module after the selected information handling system components are in an active state.
9. The method of claim 8 wherein the predetermined information comprises a bus reset command.
10. The method of claim 9 the selected information handling system components comprise a network interface controller.
11. The method of claim 8 wherein the power management module comprises the BIOS.
12. A system for sequencing power to a first set of components and a second set of components of an information handling system for management of power consumption, the system comprising:
a power management module operable to transition the first set of components between active and inactive states and to transition the second set of components from an active to an inactive state;
a power activation selector interfaced with the power management module to detect a request for activation of the components to an active state and to communicate the request for activation to the power management module for transition to an active state of the first set of component;
a power management sequencer interfaced with the power activation selector and the second set of components, the power management sequencer operable to transition the second set of components to an active state in response to the request for activation so that the second set of components have power to communicate with the power management module.
13. The system of claim 12 wherein the power management sequencer comprises:
an override circuit interfaced with the power activation selector, the override circuit operable to detect a request for activation of the components and output an override signal: and
a power switch interfaced with the power management module, the override circuit and predetermined components, the power switch operable to provide power to the predetermined components if the power management module commands application of power or the override signal is detected.
14. The system of claim 13 wherein the power management module comprises firmware disposed in an information handling system BIOS that commands application of power with a GPIO command.
15. The system of claim 14 wherein the power activation selector comprises an information handling system power switch.
16. A method for information handling system power consumption management, the method comprising:
determining inactivity at an information handling system for a predetermined time;
powering down components of the information handling system to an inactive state with a power consumption manager to reduce power consumption by the information handling system;
powering down the power consumption manager;
detecting activity at the information handling system;
powering up the power consumption manager and selected components in a substantially simultaneous manner; and
managing recovery of the components with the power consumption manager.
17. The method of claim 16 wherein detecting activity further comprises detecting user activation of an I/O device and powering up the power consumption manager and selected components further comprises switching power on to the information handling system BIOS and network interface controller upon activation of the I/O device.
18. The method of claim 17 wherein the I/O device comprises the information handling system power switch.