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B5FH-5961-01EN-00.book Page 25 Monday, April 29, 2002 2:58 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.
Power Mode
Fully On Mode
System is running. CPU, system bus, and
all other interfaces are powered.
Standby Mode
Resume system logic remains powered and
(Suspend-to-RAM)
RAM remains powered to maintain active
data. All other devices are turned off.
Hibernation Mode
Windows saves desktop state (including
(Suspend-to-Disk)
open files and documents) to hard disk.
CPU stops. All other devices are turned
off.
Power Off
System is fully powered off except for logic
components required for Suspend/Resume
button and real-time clock operation.
SUSPEND/RESUME BUTTON
When your LifeBook notebook is active, the Suspend/
Resume button can be used to manually put your note-
book into Suspend mode. Push the Suspend/Resume
button when your notebook 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 2-4 on page 6 for location)
If your LifeBook notebook is suspended, pushing the
Suspend/Resume button will return your notebook to
active operation. You can tell whether or not your
system is in Suspend mode by looking at the Power indi-
cator. (See figure 2-4 on page 6) If the indicator is visible
and not flashing, your notebook is fully operational. If
the indicator is both visible and flashing, your notebook
is in Suspend mode. If the indicator is not visible at all,
the power is off or your notebook is in Hibernation
mode.
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.
System Activity
n
n
n
n
n
n
n
n
n
Table 1. System Power States
STANDBY MODE
Standby (or Suspend-to-RAM) mode in Windows saves
the contents of your LifeBook notebook'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 notebook can be
put in Standby mode by:
Pressing the Suspend/Resume button when your
n
system is turned on.
Selecting Standby from the Windows Shut Down menu.
n
Timing out from lack of activity.
n
Allowing the battery to reach the Low Battery
n
Warning condition.
Your LifeBook notebook's system memory typically
stores the file(s) on which you are working, open applica-
tion(s) information, and any other data required to
support the operation(s) in progress. When you resume
operation from Standby mode, your notebook will
G e t t i n g S t a r t e d
Events causing system to enter mode state
From Suspend-to-RAM mode: System operation
resumed (Suspend/Resume button pressed,
resume on modem ring, resume on time).
From Hibernation mode: Suspend/Resume
button pressed.
From Off mode: Suspend/Resume button
pressed.
Standby timeout occurs.
Suspend request issued by software or by
pressing the Suspend/Resume button.
Low battery.
Suspend timeout occurs.
Clicking Start -> Shut Down -> Hibernate
(It may be necessary to Enable Hibernate
Support from Windows Power Options.)
System shutdown.
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Troubleshooting
