Fujitsu Lifebook S4542, User Manual

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36
L i f e B o o k S S e r i e s – S e c t i o n T h r e e
Power Management
Your Fujitsu LifeBook 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 operating condi-
tions, such as those for the display brightness. Internal
power management for your LifeBook 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 LifeBook 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.
*Available on models with Windows 98 Second Edition
pre-installed.
SUSPEND/RESUME BUTTON
When your LifeBook is active, the Suspend/Resume
button can be used to manually put your LifeBook
into Suspend mode. Push the Suspend/Resume button
when your LifeBook is active, but not actively accessing
anything, and immediately release the button. You will
hear two short beeps and your system will enter
Suspend mode. (See figure 2-5 on page 8 for location)
If your LifeBook is suspended, pushing the Suspend/
Resume button will return your LifeBook to active
operation. You can tell whether or not your system
is in Suspend mode by looking at the Power indicator.
(See figure 2-5 on page 8) If the indicator is visible and
not flashing, your LifeBook is fully operational. If the
indicator is both visible and flashing, your LifeBook is in
Suspend mode. If the indicator is not visible at all, the
power is off or your LifeBook is in Save-to-Disk mode.
(See Save-to-Disk Mode)
SUSPEND MODE
Suspend or Standby mode in Windows saves the
contents of your LifeBook’s system memory during
periods of inactivity by maintaining power to critical
parts. This mode will turn off the CPU, the display, the
hard drive, and all of the other internal components
except those necessary to maintain system memory and
allow for restarting. Your LifeBook can be put in
Suspend mode by:
■
Pressing the 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.
Your LifeBook’s system memory typically stores the
file(s) on which you are working, open application(s)
information, and any other data required to support the
operation(s) in progress. When you resume operation
from Suspend mode, your LifeBook will return to the
point where it left off. You must use the Suspend/Resume
button to resume operation, and there must be an
adequate power source available, or your LifeBook
will not resume.
C A U T I O N
If you are running your LifeBook on battery power,
be aware that the battery continues to discharge while
your LifeBook is in Suspend mode, though not as fast as
when fully operational.
P O I N T
Disabling the Suspend/Resume button prevents it
from being used to put your LifeBook in Suspend
or Hibernation (Save-to-Disk) mode. The resume func-
tion of the button cannot be disabled.
C A U T I O N
The Suspend or Hibernation (Save-to-Disk) mode
should not be used with certain PC Cards. Check your
PC Card documentation for more information.
When PC Cards or external devices are in use, Hiberna-
tion (Save-to-Disk) mode cannot return to the exact
state prior to suspension, because all of the peripheral
devices will be re-initialized when the system restarts.
P O I N T
If your LifeBook is actively accessing information when
you enter the Suspend 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.