ACPI Sx定义
ACPI（Advanced Configuration and Power Interface)的System State（Sx） Definitions： S0 Working State: Fully powered and operational. S1/S2 Sleep States(not generally used): Low wake latency and no system context is lost;S2 is the same as S1 except CPU and cache context is lost. S3 Sleep State(also known as Supsend to RAM): The S3 sleep state is a low wake latency sleep state;Memory image maintained and powered.CPU, chipset, I/O devices lose context. S4 Sleep State(also known as Suspend to Disk, or Hibernate): Longest wake latency sleeping state, all devices are powered off;Platform context is maintained in the hibernate file on the Hard Drive. S5 Soft Off State: S5 is similar to the S4 state except that the OS does not save any context;The system is in the "soft" off state and requires a complete boot when it wakes. ...