Acer TravelMate 330 Series, User Manual

Page: 62 / 146

Chapter 2
Operating on Battery Power 42
Power Management
This computer has a built-in power management unit that
monitors system activity. System activity refers to any activity
involving one or more of the following devices: keyboard,
mouse, floppy drive, hard disk, peripherals connected to the
serial and parallel ports, and video memory. If no activity is
detected for a period of time (called an inactivity time-out), the
computer stops some or all of these devices in order to conserve
energy.
This computer employs a power management scheme that
supports APM (Advanced Power Management) or ACPI
(Advanced Configuration and Power Interface) which allows for
maximum power conservation and maximum performance at the
same time.
If your computer is set for APM, you can set timeout values for
your computer’s devices before power-saving methods are
applied to these devices. If your computer is set for ACPI,
Windows handles all power-saving chores for your computer.
Note: Power management (APM or ACPI) greately prolongs your battery life.
See “Advanced Power Management” on page 46 and “Advanced Configuration
and Power Interface” on page 46 for more information.
Power Management Modes
Display Standby Mode
Screen activity is determined by the keyboard, the built-in
touchpad, and an external PS/2 pointing device. If these devices
are idle for the period specified by the Turn Off Display value,
the display shuts off until you press a key or move the touchpad
or external mouse.
330.book Page 42 Friday, March 5, 1999 11:08 AM