Power Management; Power/Suspend/Resume Button; Suspend Mode; Hibernation (Save-To-Disk) Feature - Fujitsu LifeBook E8210 User Manual

E8210.book Page 31 Friday, March 10, 2006 4:33 PM

Power Management

Your Fujitsu LifeBook notebook has many options and
features for conserving battery power. Some of these
features are automatic and need no user intervention,
such as those for the internal modem. However, others
depend on the parameters you set to best suit your oper-
ating conditions, such as those for the display bright-
ness. Internal power management for your notebook
may be controlled from settings made in your operating
system, pre-bundled power management application, or
from settings made in BIOS setup utility.
Besides the options available for conserving battery
power, there are also some things that you can do to
prevent your battery from running down as quickly.
For example, you can create an appropriate power saving
profile, put your notebook into Suspend mode when it
is not performing an operation, and you can limit the
use of high power devices. As with all mobile, battery
powered computers, there is a trade-off between
performance and power savings.

POWER/SUSPEND/RESUME BUTTON

When your notebook is active, the Power/Suspend/
Resume button can be used to manually put the note-
book into Suspend mode. Push the Power/Suspend/
Resume button when the notebook is active, but not
actively accessing anything, and immediately release the
button. You will hear two short beeps and the system
will enter Suspend mode.
If your notebook is suspended, pushing the Power/
Suspend/Resume button returns your notebook to active
operation. You can tell whether the system is Suspended
by looking at the Power indicator. (See Figure 2-3 on
page 6) If the indicator is visible and not flashing, your
notebook is fully operational. If the indicator is visible
and flashing, your notebook is in Suspend mode. If the
indicator is not visible, the power is off or your notebook
is in Hibernation mode. (See Hibernation Feature)

SUSPEND MODE

Suspend or Standby mode in Windows saves the
contents of your system memory during periods of
inactivity by maintaining power to critical parts. This
mode will turn off the CPU, display, hard drive, and all
the other internal components except those necessary to
maintain system memory and allow for restarting. Your
notebook can be put in Suspend mode by:
Pressing the Power/Suspend/Resume button when
■
your system is turned on.
Selecting Standby from the Windows Shut Down menu.
■
Timing out from lack of activity.
■
Allowing the battery to reach the Dead Battery
■
Warning condition.
G e t t i n g S t a r t e d
Your notebook's system memory typically stores the file
on which you are working, open application informa-
tion, and any other data required to support operations
in progress. When you resume operation from Suspend
mode, your notebook will return to the point where it left
off. You must use the Power/Suspend/Resume button to
resume operation, and there must be an adequate power
source available, or your notebook will not resume.
■ If you are running your notebook on
battery power, be aware that the battery
continues to discharge while your note-
book is in Suspend mode, though not as
fast as when fully operational.
Disabling the Power/Suspend/Resume
■
button prevents it from being used to
put the notebook into Suspend or Hiber-
nation (Save-to-Disk) mode. The button
resume function cannot be disabled.
■ The Suspend or Hibernation (Save-to-
Disk) mode should not be used with cer-
tain PC Cards. Check your PC Card doc-
umentation for more information. When
PC Cards or external devices are in use,
Hibernation (Save-to-Disk) mode cannot
return to the exact state prior to suspen-
sion, because all of the peripheral
devices will be re-initialized when the
system restarts.
■ If your notebook is actively accessing
information when you enter the Sus-
pend or Hibernation (Save-to-Disk)
mode, changes to open files are not lost.
The files are left open and memory is
kept active during Suspend mode or the
memory is transferred to the internal
hard drive during Hibernation mode.
The main advantage of using Hibernation
(Save-to-Disk) is that power is not
required to maintain your data. This is
particularly important if you will be leaving
your notebook in a suspended state for a
prolonged period of time. The drawback
of using Hibernation mode is that it
lengthens the power down and power up
sequences and resets peripheral devices.

HIBERNATION (SAVE-TO-DISK) FEATURE

The Hibernation feature saves your system's memory
contents to the hard drive as a part of the Suspend/
Resume mode. You can enable or disable this feature.
Enable or Disable the Hibernation Feature
The default setting is not enabled. To enable or disable
the Hibernation feature follow these easy steps:
1. From the Start menu, select Settings, and then select
Control Panel.
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