Power Management; Suspend/Resume Button; Standby Mode - Fujitsu Lifebook P1510D User Manual

L i f e B o o k P S e r i e s N o t e b o o k / T a b l e t P C

Power Management

Your LifeBook P Series notebook/Tablet PC has many
options and features for conserving battery power. Some
of these features are automatic and need no user inter-
vention, such as those for the internal modem. However,
others depend on the parameters you set to best suit
your operating conditions, such as those for the display
brightness. Internal power management for your note-
book/Tablet PC 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 operate at full speed.

Standby Mode

Resume system logic remains powered
(Suspend-to-RAM) and 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 notebook/Tablet PC is active, the Suspend/
Resume button can be used to manually put your system
into Standby mode. Push the Suspend/Resume button
when your notebook/Tablet PC 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 2-6 on page 11 for location).
If your notebook/Tablet PC is suspended, pushing the
Suspend/Resume button will return your system to
active operation. You can tell whether or not your
system is in Standby mode by looking at the Power indi-
cator. See "" on page 14. If the indicator is visible and not
flashing, your system is fully operational. If the indicator
is both visible and flashing, your system is in Standby
mode. If the indicator is not visible at all, the power is off
or your system is in Hibernate mode (See Hibernate
Mode)
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System Activity
Table 3-1. System Power States
Besides the options available for conserving battery
power, there are also some things that you can do to
prevent your system battery from running down as
quickly. For example, you can create an appropriate
power saving profile, put your system 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.
Events causing system to enter mode state
■ 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 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.)
Low battery condition
■
System shutdown.
■
■ Low battery condition
STANDBY MODE
Standby mode in Windows saves the contents of your
notebook/Tablet PC'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 system can be put in Standby 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.
Closing the system cover.
■
Your notebook/Tablet PC's system memory typically
stores the file(s) on which you are working, open appli-
cation(s) information, and any other data required to
support the operation(s) in progress. When you resume