Power Management Features

Power Management Features

Three power management modes are provided by the computer to save 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.
The CPU clock is set to the lowest speed.

Events that cause entering of standby mode:

Standby requested by the Fn key. (Fn+F3)
No activity under auto-standby enabled by the feature utility.

Events that cause exiting or resuming of 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 power is powered-off.
The hard disk is powered-off.
The CPU is stopped.

In the ThinkPad Features Program, the computer can be set to 'Will not suspend even if LCD is closed'..

When the computer is powered with ac power and is used with one of the following IBM PC cards, the computer enters standby mode , the PC card and application program remain active.

3270 Emulation Credit Card Adapter
5250 Emulation Credit Card Adapter
Token-Ring 16/4 Credit Card Adapter
Credit Card Adapter for Ethernet

In the following condition, the computer cannot enter the suspend mode.

While the communication link is running.
When a serial mouse or other pointing device is selected in the Config menu of Easy-Setup.

Events that cause entering of 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, 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).
The PS2 OFF command is set in the ThinkPad Features program.

Events that cause exiting or resuming of suspend mode:

(Resume) The LCD is opened.
(Resume) The keyboard is closed.
(Resume) Real time clock alarm signaled.
(Resume) Ring indicator (RI) signaled by serial or PCMCIA device.
(Resume) The Fn key is pressed.
(Exit) Timer conditions are satisfied to enter 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.

The computer cannot enter hibernation mode when:

A serial mouse or other pointing device is selected in the Config menu.
The computer is powered with ac power and one of the following IBM PC cards is used.
- PCMCIA Data/FAX Modem
- High Speed PCMCIA Data/FAX Modem
- 3270 Emulation Credit Card Adapter
- 5250 Emulation Credit Card Adapter
- Token-Ring 16/4 Credit Card Adapter
- Credit Card Adapter for Ethernet

Events that cause entering of hibernation mode:

The hibernation mode is requested by the Fn key (Fn+F12).
Timer conditions are satisfied in suspend mode.
Critical low battery condition.

Event that causes exiting of hibernation mode.

The power-on switch is operated.

When power is turned on, the hibernation history of 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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