Power Management; Automatic Configuration And Power Interface (Acpi) Bios; Advanced Power Management; Automatic Hardware Power Management Features - IBM A40I TYPE 2271 Hardware Maintenance Manual

Power management

Power management reduces the power consumption of certain components of the
computer such as the system power supply, processor, hard disk drives, and some
monitors. Advanced Power Management and Rapid Resume
features of some personal computers.

Automatic configuration and power interface (ACPI) BIOS

Being an ACPI BIOS system, the operating system is allowed to control the power
management features of the computer and the setting for Advanced Power
Management (APM) BIOS mode are ignored. Not all operating systems support
ACPI BIOS mode.

Advanced Power Management

Energy-saving settings can be viewed and changed by using the Advanced Power
Management menu in the Configuration/Setup Utility program.

Automatic Hardware Power Management features

Automatic Hardware Power Management can reduce the power states of the
computer, processor, and monitor (if the monitor supports DPMS) if they are
inactive for a predetermined length of time.
There are three levels of specified time that the computer must be inactive before
the power management options that are selected take effect. Select the amount of
time that is offered within each level.
Level 1
Level 2
Level 3
At each level, you can define the amount of energy savings by specifying values
for the following options.
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v
v
Attention:
If a device, such as a monitor, does not have power-management capabilities, it can be
damaged when exposed to a reduced-power state. Before making energy-saving selections
for the monitor, check the documentation supplied with the monitor to see if it supports
Display Power Management Signaling (DPMS).
Set time from 5 minutes to 4 hours.
Set time from 10 minutes to 5 hours.
Set time from 15 minutes to 6 hours.
System Power
– Select On for the computer to remain on.
– Select Off for the computer to shut down.
Processor Speed
Set the microprocessor to be disabled, or to run at 1, 10, 25, or 50 percent of its
internal clock speed.
Display
Set display to be disabled or to be reduced at these power states:
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Manager are
Chapter 8. Additional Service Information
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