HP 2530p - EliteBook - Core 2 Duo 2.13 GHz Setup And Configuration Manual - Page 16

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Appendix A: Power / Sleep / Global States Explained

Under Advanced Configuration and Power Interface (ACPI) specification a PC can be in one of

several Power states. These power states are also known as Sleep (Sx) states or Global (Gx) states.

is the ON state. The PC is fully functioning. All system devices and operating system, if

available, are running.

is the Standby (Microsoft terminology) or Suspend-to-RAM state. The memory subsystem and

power rail remains powered, while the rest of the system including the processor are not

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powered. When the system resumes from S3, the system context remains intact because the

system memory was preserved and powered at all times.

is the Hibernate (Microsoft terminology) or Suspend-to-Disk state. The system context (memory)

is saved to the hard drive as a hibernation file. When the system resumes from S4, the system

context is restored from the hibernation file. V

including system memory and the processor are not powered.

is the Soft Off state. It is identical to S4 with the exception that the system context is not

saved. When the system resumes from S5, it will power up and going through POST.

remains powered, but all other subsystems

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