IBM 8302 Hardware Maintenance Manual

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Contents

Power managementPower management reduces the power consumption of certain components of thecomputer such as the system power supply, processor, hard disk drives, and somemonitors. Advanced Power Management and Rapid Resume ™ Manager arefeatures of some personal computers.Automatic configuration and power interface (ACPI) BIOSBeing an ACPI BIOS system, the operating system is allowed to control the powermanagement features of the computer and the setting for Advanced PowerManagement (APM) BIOS mode are ignored. Not all operating systems supportACPI BIOS mode.Advanced Power ManagementEnergy-saving settings can be viewed and changed by using the Advanced PowerManagement menu in the Configuration/Setup Utility program.Attention:If a device, such as a monitor, does not have power-management capabilities, it can bedamaged when exposed to a reduced-power state. Before making energy-saving selectionsfor the monitor, check the documentation supplied with the monitor to see if it supportsDisplay Power Management Signaling (DPMS).Automatic Hardware Power Management featuresAutomatic Hardware Power Management can reduce the power states of thecomputer, processor, and monitor (if the monitor supports DPMS) if they areinactive for a predetermined length of time.Set the time for the system to enter a low-power state.You can define the amount of energy savings by specifying values for thefollowing options.v System Power– Select On for the computer to remain on.– Select Off for the computer to shut down.v DisplaySet display to be disabled or to be reduced at these power states:– Standby: Screen is blank, but can be restored immediately when any activityis detected.– Suspend: Monitor uses less power than in Standby mode. Screen image isrestored after a few seconds when any activity is detected.– Off: Monitor power is off. Press Monitor power button to restore power. Onsome monitors, you might have to depress the power button twice.Setting Automatic Hardware Power Management features1. Start the Configuration/Setup Utility program (see “Setup Utility program” onpage 24).2. Select Power Management from the Configuration/Setup Utility programmenu.Chapter 9. Additional Service Information 269