Power Management; Power/Suspend/Resume Button; Sleep Mode; Hibernation (Save-To-Disk) Feature - Fujitsu LifeBook A3130 User Manual

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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 Sleep 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 Sleep mode. Push the Power/Suspend/Resume
button when the notebook is active, but not actively
accessing anything, and immediately release the button.
The system will enter Sleep 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 in Sleep
mode 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 Sleep mode. If
the indicator is not visible, the power is off or your note-
book is in Hibernation mode. (See Hibernation Feature)

SLEEP MODE

Sleep mode in Windows saves the contents of your
system memory during periods of inactivity by main-
taining 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 Sleep mode by:
Pressing the Power/Suspend/Resume button when
■
your system is turned on.
Clicking on the power icon on the lock menu.
■
Selecting Sleep from the Windows Shut Down menu.
■
Timing out from lack of activity.
■
Allowing the battery to reach the Dead Battery
■
Warning condition.
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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 Sleep
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 Sleep 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 Sleep or Hiberna-
tion (Save-to-Disk) mode. The button
resume function cannot be disabled.
The Sleep or Hibernation (Save-to-Disk)
■
mode should not be used with certain
PC Cards. Check your PC Card docu-
mentation 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 Sleep or
Hibernation (Save-to-Disk) mode,
changes to open files are not lost. The
files are left open and memory is kept
active during Sleep 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 Sleep/Resume
mode. You can enable or disable this feature.
Enable or Disable the Hibernation Feature
The default settings are not enabled. To enable or disable
the Hibernation feature follow these easy steps:
1. From the Start menu, select Control Panel -> Power
Options.