Fujitsu B3020D Manuel d'utilisateur télécharger pdf (Page 39)

LifeBook B 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 MODE

Standby 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.

Standby Mode

(Suspend-to-RAM)

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

(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 32 Friday, April 23, 2004 11:41 AM

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Fujitsu B3020D Manuel d'utilisateur Page 39

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