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1What: /sys/devices/.../real_power_state2Date: January 20133Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>4Description:5 The /sys/devices/.../real_power_state attribute is only present6 for device objects representing ACPI device nodes that provide7 power management methods and use ACPI power resources for power8 management.9 10 If present, it contains a string representing the real ACPI11 power state of the given device node as returned by the _PSC12 control method or inferred from the configuration of power13 resources. Its possible values, "D0", "D1", "D2", "D3hot", and14 "D3cold", reflect the power state names defined by the ACPI15 specification (ACPI 4 and above).16 17 In some situations the value of this attribute may be different18 from the value of the /sys/devices/.../power_state attribute for19 the same device object. If that happens, some shared power20 resources used by the device node are only ON because of some21 other devices using them at the moment.22 23 This attribute is read-only.24