Power Management Features (765D-9546 765L-9547)
Power Management Features
Three power management modes are provided by the
computer to reduce power
consumption and prolong battery power.
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)
- There has been no activity auto-standby in the
ThinkPad Features program.
The computer exits standby mode and resumes operation when a key is pressed.
In suspend mode, the following occurs, in addition to
- The LCD is powered off.
- The hard disk is powered off.
- The CPU is stops.
Events that cause the computer to enter suspend mode:
- Suspend mode is requested by the Fn key (Fn+F4).
- The LCD is closed.
- 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
- Either the PS2 OFF or PS2 SUSpend
command is set in the ThinkPad Features program.
- In the ThinkPad Features Program, the computer can be set to
'Will not suspend even if LCD is closed.'
- In the ThinkPad Configuration 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
- While the computer is attached to a Dock i, the computer
cannot enter suspend mode.
Events that cause the computer to exit or resume suspend mode:
- The LCD is opened.
- The keyboard is closed.
- The real time clock alarm is signaled.
- The ring indicator
(RI) is signaled by a serial or PCMCIA device.
- The Fn key is pressed.
- An external keyboard key is pressed while
operating with ac power.
The computer also exits suspend mode when timer conditions are
satisfied for entering hibernation mode.
NOTE:Before using the hibernation mode, the hibernation file is needed.
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.
- In the ThinkPad Configuration program, the computer can be set
to 'suspend hibernate while docked'.
- The computer cannot enter hibernation mode:
- It is powered with ac power and a communication PC card is used.
- It is attached to a Dock I.
Events that cause the computer to enter hibernation mode:
- Hibernation mode is requested by the Fn key (Fn+F12).
- Timer/timeout conditions are satisfied in suspend mode.
- A critical low battery condition occurs.
- The PS2 HIB ernation command is set in the
ThinkPad Configuration program.
The computer exits hibernation mode and resumes operation when 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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