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LifeBook B6200 Series – Section Three
Power Management
Your 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 operating condi-
tions, such as those for the display brightness. 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 notebook battery from running down as
quickly. For example, you can create an appropriate
power saving profile, put your notebook into Standby
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.
Table 3-1. System Power States
SUSPEND/RESUME BUTTON
When your LifeBook notebook is active, the Suspend/
Resume button can be used to manually put your Life-
Book into Standby 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
Standby mode. (See figure 2-5 on page 8 for location).
If your notebook is suspended, pushing the Suspend/
Resume button will return your notebook to active oper-
ation. You can tell whether or not your system is in
Standby mode by looking at the Power indicator. See
“Power Indicator” on page 13. 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 Standby mode. If the indicator is not visible at all,
the power is off or your notebook is in Hibernate mode.
STANDBY (SLEEP) MODE
Standby (Sleep mode in Vista) mode in Windows saves
the contents of your 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
system is turned on.
■
Selecting Standby from Windows Shut Down menu.
■
Timing out from lack of activity.
■
Allowing the battery to reach the Dead Battery
Warning condition.
Your notebook’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
Power Mode System Activity Events causing system to enter mode state
Fully On Mode System is running. CPU, system bus,
and all other interfaces operate at full
speed.
■
From Standby 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.
In Windows XP:
Standby Mode or
Suspend-to-RAM
In Windows Vista:
Sleep Mode
Resume system logic remains powered
and RAM remains powered to maintain
active data. All other devices are turned
off.
■
Standby timeout occurs.
■
Suspend request issued by software or by pressing
the Suspend/Resume button.
■
Low battery.
Hibernation Mode
or Suspend-to-Disk
Windows saves desktop state (including
open files and documents) to hard disk.
CPU stops. All other devices are turned
off.
■
Suspend timeout occurs.
■
Clicking Start -> Shut Down -> Hibernate
(It may be necessary to Enable Hibernate Support
from Windows Power Options.)
■
Low battery condition
Power Off System is fully powered off except for
logic components required for Suspend/
Resume button and real-time clock
operation.
■
System shutdown.
■
Low battery condition
B Series.book Page 34 Thursday, May 17, 2007 2:25 PM