sysfs-devices-real_power_state (1026B)
1What: /sys/devices/.../real_power_state 2Date: January 2013 3Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 4Description: 5 The /sys/devices/.../real_power_state attribute is only present 6 for device objects representing ACPI device nodes that provide 7 power management methods and use ACPI power resources for power 8 management. 9 10 If present, it contains a string representing the real ACPI 11 power state of the given device node as returned by the _PSC 12 control method or inferred from the configuration of power 13 resources. Its possible values, "D0", "D1", "D2", "D3hot", and 14 "D3cold", reflect the power state names defined by the ACPI 15 specification (ACPI 4 and above). 16 17 In some situations the value of this attribute may be different 18 from the value of the /sys/devices/.../power_state attribute for 19 the same device object. If that happens, some shared power 20 resources used by the device node are only ON because of some 21 other devices using them at the moment. 22 23 This attribute is read-only.