Although Windows has no explicit hardware or firmware requirements for Away Mode, system manufacturers might want to innovate their hardware designs for use with Away Mode. A common hardware feature is to change the power indicator to indicate that the system is in Away Mode. Additionally, system manufacturers may want to change the default value of the Prompt for Password on Resume power setting.
Away Mode is not a new power state and the system remains in the on (ACPI S0) state when in Away Mode, so Windows does not change the state of the power indicator.
System manufacturers can build a separate device driver to enable this functionality and change the power indicator state when the system is in Away Mode. The device driver registers for the GUID_SYSTEM_AWAYMODE notification and communicates with the ACPI firmware to change the indicator state.
For more information and sample device driver code, system manufacturers should see “Away Mode DDK for Windows Vista.”
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