sysfs-devices-power_state 877 B

1234567891011121314151617181920
  1. What: /sys/devices/.../power_state
  2. Date: January 2013
  3. Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  4. Description:
  5. The /sys/devices/.../power_state attribute is only present for
  6. device objects representing ACPI device nodes that provide power
  7. management methods.
  8. If present, it contains a string representing the current ACPI
  9. power state of the given device node. Its possible values,
  10. "D0", "D1", "D2", "D3hot", and "D3cold", reflect the power state
  11. names defined by the ACPI specification (ACPI 4 and above).
  12. If the device node uses shared ACPI power resources, this state
  13. determines a list of power resources required not to be turned
  14. off. However, some power resources needed by the device node in
  15. higher-power (lower-number) states may also be ON because of
  16. some other devices using them at the moment.
  17. This attribute is read-only.