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Chapter 25. Special Features for Noteboo... > Understanding Power Management - Pg. 464

Special Features for Notebook Users 464 To configure a new profile with the same hardware set, first start Windows 98 by using the hardware profile in which you want to make changes. To change the resolution for use with an external monitor, for example, select the hardware profile you use when you have the monitor attached. Then, change the settings for your new resolution. These changes are saved in the current hardware profile only; the other hardware profiles are unaffected. Understanding Power Management New portable and desktop PCs feature power management capabilities that let you specify schemes for conserving power (and battery life) by shutting down devices (such as hard disks, CD-ROMs, parallel and serial ports, and so on) after a specified time of inactivity. Windows 98 takes advantage of these new hardware designs and offers a software control for power management schemes under the Power Management object of the Control Panel. Tip To use the Windows 98 power management features, your PC must support power man- agement through its BIOS. Read your PC's documentation to find out whether the machine supports power management and to determine how to enable the capability in the BIOS. Over the last few years, the computer industry has hammered out several specifications for PC power management. The original specification was called Advanced Power Management (APM) 1.0, and it defined interactions among a PC's hardware, BIOS (page 144), and software that let the PC operate at different levels of power consumption including full power, sleep, and standby. Sub- sequent revisions of APM added the capability to manage the power consumption of PC Card de- vices and portables with multiple batteries, as well as other features. The very latest PC power management scheme, which is supported by newer computers, is called