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IBM-AUSTRIA - PC-HW-Support 30 Aug 1999 |
Power Management Features
Power Management Features
Three power management modes are available in the computer system to reduce
power consumption and to prolong battery life.
Standby Mode:
In standby mode, the following occurs:
For TP 390E - (2626)
- The LCD backlight turns off.
- The audio amplifier turns off. (Fn+F3)
For TP 390/i Series 1700 - (2626, 2627)
- The LCD backlight turns off.
- The hard disk drive motor stops.
- The audio amplifier turns off. (Fn+F3)
Events that cause the computer to enter standby mode:
- Standby mode requested by the Fn key (Fn+F3).
The computer exits standby and resumes operation when any key is pressed.
Suspend Mode:
In suspend mode, the following occurs:
- The LCD is powered off.
- The hard disk drive is powered off.
- The CPU stops.
Events that cause the computer to enter suspend mode:
Notes:
- In the IBM BIOS Setup Utility, the computer can be set to suspend when lid is closed.
- In the IBM BIOS Setup Utility, the computer can be set to suspend when docked.
The following events cause the computer to resume operation from suspend mode:
- The Lid is opened.
- The real time clock alarm is signaled.
- The ring indicator (RI) is signaled by a serial device or a PC Card device.
- The Fn key is pressed.
- Wake on LAN occurs.
- Power switch is pressed.
The computer also exits suspend mode when timer conditions are satisfied
for entering hibernation mode.
Hibernation Mode: For Windows NT or OS/2 user:
A Windows NT or OS/2 user cannot create a hibernation file in a Windows NT
or OS/2 system that uses the NTFS/HPFS format system.
If you want to use hibernation mode, you should reinstall Windows NT with a FAT format
system.
Also, if boot manager is installed, the computer cannot enter hibernation mode.
Note: Before using hibernation mode, you need a hibernation file.
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.
Notes:
- In the ThinkPad Configuration program, the computer can be set to suspend when docked.
- The computer cannot enter hibernation mode when it is attached to the ThinkPad Port Replicator with
Advanced Etherjet Feature.
Events that cause the computer to enter hibernation mode:
- Hibernation mode requested by function key (Fn+F12).
- Timer conditions are satisfied in suspend mode when hibernate by timer is enabled.
- A critically low battery condition occurs.
- The power switch is pressed. (BIOS Setup)
The computer exits hibernation mode and resumes operation when the power-on switch is pressed.
When power is turned on, the hibernation file in the boot record on the hard disk drive is read
and the system status is restored from the hard disk drive.
The following events cause the computer to resume operation from hibernation mode.
- The power switch is pressed.
- The real time clock alarm is signaled.
- Wake on LAN occurs.
How to Create the Hibernation Function:
Do as follows:
For TP 390E - (2626)
- Start the ThinkPad Configuration program.
- Click on the Power Management icon.
- Click on the Hibernation Options tab.
- Click on Enable Hibernation.
- Click on OK.
For TP 390/i Series 1700 - (2626, 2627)
- Turn off the computer.
- Insert the hibernation utility diskette into the diskette drive
(you can create the diskette using the Diskette Factory).
- Turn on the computer.
- Follow the instructions on the screen.
Note: If you change the memory size, you need to recreate the
hibernation file or partition. For partition-based hibernation, use the hibernation
utility to delete the partition first before creating a new one.
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