Acpi (Advanced Configuration And Power Interface); Introduction; Acpi Sleep Status; Fast Resume - Compal Notebook PC User Manual

4.7 ACPI (Advanced Configuration and Power Interface)

4.7.1 Introduction

The Advanced Configuration and Power Interface (ACPI) is a well-specified power
management and configuration mechanism. It evolves the existing collection of
power management codes, APM, PnP BIOS, and Etc.

4.7.2 ACPI Sleep Status

BIOS must support the following sleep states – S3, S4 and S5.

4.7.3 Fast Resume

BIOS must hands off the control to the operating system within the following time
limits:
S3->S0
*Measured using the Microsoft VTS (Velocity) tool.
In addition, total resume time from S3 must be completed within 5 seconds.

4.7.4 Power State Transition Diagram

The state transition diagram in ACPI mode is as follows:
From (State) Leave By Condition
S3 Power Button
Internal Keyboard
RTC Alarm
On board LAN (WOL)(*1)
S3 Battery Critical Hibernation trip point reached (*2)
The timer timeout after the inactivity of selected timer in
power scheme, System Hibernate, reaches the setting (*2)
S4 Power Button
On board LAN (Only in AC mode)
RTC Alarm(Only in AC mode)
S5 Power Button
On board LAN (Only in AC mode)
Required
2seconds
Enter (State)
S0
S4
S0
S0
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