Power Management Features (9546, 9547)
Power Management Features
Three power management modes are provided by the
computer to reduce power
consumption and prolong battery power.
Standby Mode
When in standby mode the following occurs:
- The LCD backlight turns off.
- The hard disk motor stops.
Events that cause the computer to enter standby mode:
- Standby requested by the Fn key
(Fn+F3).
- No activity under auto-standby enabled by the
ThinkPad Features program.
Events that cause the computer to exit or resume standby mode:
- (Resume) Any key operation.
Suspend Mode
When in suspend mode, the following, in addition to the four
actions of standby mode, occur:
- The LCD is powered off.
- The hard disk is powered off.
- The CPU is stopped.
NOTE:
- In the ThinkPad Features program, the computer can be set to
'Will not suspend even if LCD is closed'.
- In the ThinkPad Features program, the
computer can be set to
'suspend hibernate while docked.'
- When the computer is powered with ac power and is used
with one of the communication PC cards, the computer enters
standby mode , the PC card and application program
remain active.
- In the following conditions, the computer cannot enter suspend
mode:
- While a communication link is running.
- While the computer is attached to a Dock I.
Events that cause the computer to enter suspend mode:
- Suspend mode is requested by the Fn key
(Fn+F4).
- The LCD is closed.
- The keyboard is opened.
- The specified time has elapsed from the last operation with
the keyboard, mouse, hard disk drive, parallel connector, or
diskette drive, or the AC Adapter is plugged in.
The time is specified by Suspend Timer
in the ThinkPad Features program.
- The battery condition is low. The battery power indicator
blinks orange.
- In the ThinkPad features program, the
computer can be set to Hibernate when
battery becomes low. The default setting is suspend.
- Either the PS2 OFF or PS2 SUSpend
command is set in
the ThinkPad Features program.
Events that cause the computer to exit or resume suspend mode:
- (Resume) The LCD is opened.
- (Resume) The keyboard is closed.
- (Resume) The real time clock alarm is signaled.
- (Resume) The ring indicator
(RI) is signaled by a serial or PCMCIA device.
- (Resume) The Fn key is pressed.
- (Resume) An external keyboard key is pressed while
operating with ac power.
- (Exit) Timer conditions are satisfied
for entering hibernation mode.
Hibernation Mode
When in hibernation mode, the following occurs:
- The system status, RAM, VRAM, and setup
data are stored on the hard disk.
- The system is powered off.
NOTE:
- In the ThinkPad Features program, the
computer can be set to
suspend hibernate while docked.
- The computer cannot enter hibernation mode when:
- It is powered with ac power and a
communication PC card is used.
- The computer is attached to a Dock I.
Any of the following events can
cause the computer to enter hibernation mode:
- Hibernation mode is requested by the Fn
key (Fn+F12).
- Timer conditions are satisfied in suspend mode.
- A critical low battery condition occurs.
- The PS2 HIBernation command is set in the
ThinkPad Features program.
The following event causes the computer to exit hibernation
mode:
- The power-on switch is turned on.
When power is turned on, the hibernation history in the boot
record on the hard disk is recognized and system status is restored
from the hard disk to resume operation.
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