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3-16 Using the BIOS Setup Utility
Windows 2000 Power Management States
ACPI uses different levels or states of power management. The power management
states occur automatically, based on the system’s default settings, or manually, when
invoked. Settings are configurable to occur while on battery power or AC power.
The Windows 2000 ACPI power management states include:
! LCD timeout — manages power at the lowest level by shutting down the LCD.
! Standby — also known as Save-to-RAM (STR), Standby manages power by saving
your current working environment to memory and shutting down most system
devices. Conserves more power than an LCD timeout.
! Hibernate — also known as save-to-disk, or save-to-file (STF) manages power by
saving the current working environment to an area on your hard disk, then powering
off your system. Conserves the most battery power.
Recognizing the Windows 2000 Power Management States
It is important to recognize your system’s behavior when in each of these power
management states. The following table describes the system behavior for each power
management state.
Windows 2000 Power Management Behavior
LCD Timeout Standby (STR) Hibernate (STF)
Default
Setting
2 Minutes, DC power
15 Minutes, AC power
5 Minutes, DC power
20 minutes, AC power
30 minutes after Standby.
1
Manually
Invoke
Close LCD panel. Go to Start, Shutdown,
Standby.
Close LCD panel.
2
Press Power button.
2
System
behavior
LCD panel is blank.
Status LED lights
green.
LCD panel is blank.
Status LED blinks green.
LCD panel is blank.
Status LED turns off.
Progress bar indicates that
current working
environment is saved to
hard disk.
Resume
Press any key. Press Power button. Press Power button.
Progress bar appears
during process.
1
When 3% battery power remains.
2
Only when set in Advanced Windows Power Management Properties.