IBM ThinkPad 380, User Manual

Page: 89 / 247

Using Power Management
Hibernation Mode
Notes:
1. Using a particular PC Card can
disable hibernation mode. (See
page 72.)
2. With a base memory of 16MB, it
takes approximately 10 seconds
to enter hibernation mode and 18
seconds to resume normal
operation. (The time to enter or
exit hibernation mode depends
on the computer memory size,
and application.)
In hibernation mode, all tasks are stopped and the memory data and
the current status of the computer are stored on the hard disk drive;
then power is turned off. No battery power is used. When power is
turned on again, the computer automatically restores the tasks and
resumes normal operation.
To enter hibernation mode, press Fn
+
F12. When the computer
enters hibernation mode, you hear one short beep. A graphical
message appears and suspend mode indicator lamp blinks; then a
short beep sounds again to inform you that the computer has
entered hibernation mode.
To return to normal operation, press the power switch.
Before you can use hibernation mode, you must first create a
hibernation file. See the next section.
Creating the Hibernation File
Attention:
The hibernation file must not be
created in a compressed data area
of the hard disk.
When installing an operating system or installing additional computer
memory, you must create a hibernation file on the hard disk drive to
use hibernation mode. (You need to create the hibernation file only
once after installing an operating system or additional memory.)
The size of the hibernation file will be approximately 1MB greater
than total memory. For example, if you have installed an optional
16MB memory module (DIMM) and since the base memory is 16MB,
the hibernation file is 33MB:
(16MB + 16MB) + 1MB = 33MB
Chapter 4. Using Battery Power
69