Always ready computing device

• US 7,689,842 B2
• Filed: 01/21/2008
• Issued: 03/30/2010
• Est. Priority Date: 02/17/2004
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Pierce, Tony Dwayne, Viscaraola, Peter, Westerinen, William Jefferson, Anderson, Jason Michael, Marshall, Allen
• Primary Examiner(s): CHEN, TSE W
• Application Number:
  US12/017,155
• Publication Number:
  US 20080178022A1
• Time in Patent Office: 799 Days
• Field of Search: 713/300, 713/310, 713/324
• US Class Current: 713/310
• CPC Class Codes: G06F 1/3234 Power saving characterised by the action undertaken
• CPC Class Codes: G06F 1/3287 by switching off individual functional units in the computer system
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Systems and methods for producing a simulated off condition in a computing device using a set of software drivers that interact with a system service and the device BIOS. The computing device includes system components such as a power supply, processors and fans that are put into a low power state upon receiving a signal to power off the device. This provides the appearance to users that the computing device is off. The system components, however, remain enabled to run applications when the computing device is in the simulated off condition. If necessary, the device can be returned to a fully on condition to process applications that require the system components to be brought out of the low power state to execute.

Claims

1. A method of providing a simulated off condition in a computing device via a set of software extensions, said method comprising:

providing a device driver for each component to be managed;

providing a policy driver to coordinate information from device drivers to determine a power state of said computing device;

receiving a signal to change the power state of said computing device;

instructing system components to change their respective power states in accordance with said signal;

if said signal is representative of a request to enter a low power state, reducing power consumption of said system components such that said computing device enters a simulated off state, wherein said computing device remains at a fully on and said system components remain enabled to run applications when the computing device is in the simulated off condition;

if said signal is representative to a request to enter a fully on power state, returning said system components to said fully on power state;

locking human interface devices by discarding inputs; and

detecting a predefined input sequence, said predefined sequence being said signal.

2. The method of claim 1, further comprising said policy driver periodically polling each device driver.

3. The method of claim 1, wherein a system service is provided, said system service:

instructing processors within said computing device to clock-down to a lowest state;

discontinuing a display signal to turn off a monitor;

reducing a power supply output;

turning off cooling fans; and

indicating that the computing device is in the simulated off condition.

4. The method of claim 1, further comprising:

monitoring for applications that require said system components to utilize more power than said low power state; and

bringing predetermined ones of said system components out of said lower power state to process the applications that require more power.

5. The method of claim 4, further comprising returning the computing device to said simulated off condition after the applications that require said system components to utilize more power have completed.

6. The method of claim 1, wherein the computing device is in an ACPI S0 state when the computing device is in said simulated off condition, and

wherein the computing device enters an ACPI S3 state after a predetermined period of time.

7. A method of producing a simulated off condition in a computing device when the computing device is in an ACPI S0 state, the method comprising:

providing a device driver for each component to be managed;

providing a policy driver to coordinate information from device drivers to determine a power state of said computing device;

receiving a signal to change the power state of said computing device;

instructing system components to change their respective power states in accordance with said signal;

if said signal is representative of a request to enter a low power state, reducing power consumption of said system components using ACPI methods such that said computing device enters a simulated off state, wherein said computing device at a fully on and said system components remain enabled to run applications when the computing device is in the simulated off condition;

if said signal is representative to a request to enter a fully on power state, returning said system components to said fully on power state using ACPI methods;

locking human interface devices by discarding inputs; and

detecting a predefined input sequence, said predefined sequence being said signal.

8. The method of claim 7, said reducing power consumption of said system components is performed by a system service, said method further comprising:

instructing processors within said computing device to clock-down to a lowest state;

discontinuing a display signal to turn off a monitor;

muting system audio;

pausing media playback;

reducing a power supply output;

turning off cooling fans; and

indicating that the computing device is in the simulated off condition.

9. The method of claim 8, further comprising:

monitoring for applications that require said system components to utilize more power than said low power state; and

bringing predetermined ones of said system components out of said lower power state to process the applications that require more power.

10. The method of claim 9, further comprising returning the computing device to said simulated off condition after the applications that require said system components to utilize more power have completed.