Acer Aspire M5640 - Manual (Page 45)

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The following table describes the parameters found in this menu.
Parameter Description Options
ACPI Function This item allows you to enable or disable
the ACPI function [Enabled], [Disabled]
ACPI Suspend
Type This item specifies the power saving modes
for ACPI function. S1 (POSP: The S1 sleep
mode is a low power state.. In this state, no
system context (SPU or chipset) is lost and
hardware maintains all system context/ S3
(STR): The S3 sleep mode is s power-down
state in which power is supplied only to
essential components such as main
memory and wake-capable devices and all
system context is saved to main memory.
The information stored in memory will be
used to restore the PC to the previous state
when an wake-up event occurs. [S1 (POS)]: Set ACPI
suspend
type to
S1/POS
(Power On
Suspend).
[S3 (STR)]: Set ACPI
suspend
type to
S3/STR
HDD Power
Down The setting controls how long a hard disk
drive must be left idle before it spins
downs. [Disabled], [Standby],
[Suspend]
HDD Down In
Suspend Enables or Disables the functionality of
HDD down in suspend [Enabled], [Disabled]