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- What: /sys/devices/.../real_power_state
- Date: January 2013
- Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Description:
- The /sys/devices/.../real_power_state attribute is only present
- for device objects representing ACPI device nodes that provide
- power management methods and use ACPI power resources for power
- management.
- If present, it contains a string representing the real ACPI
- power state of the given device node as returned by the _PSC
- control method or inferred from the configuration of power
- resources. Its possible values, "D0", "D1", "D2", "D3hot", and
- "D3cold", reflect the power state names defined by the ACPI
- specification (ACPI 4 and above).
- In some situations the value of this attribute may be different
- from the value of the /sys/devices/.../power_state attribute for
- the same device object. If that happens, some shared power
- resources used by the device node are only ON because of some
- other devices using them at the moment.
- This attribute is read-only.
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