P Series.book Page 34 Monday, October 9, 2006 10:58 AM
L i f e B o o k P 1 6 0 0 S e r i e s N o t e b o o k
Power Management
Your LifeBook P1600 Series 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,
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
Power Mode | System Activity |
| Events causing system to enter mode state |
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Fully On Mode | System is running. CPU, system bus, and | ■ | From Standby mode: System operation resumed |
| all other interfaces operate at full speed. |
| (Suspend/Resume button pressed, resume on |
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| modem ring, resume on time). |
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| ■ | From Hibernation mode: Suspend/Resume button |
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| pressed. |
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| ■ | From Off mode: Suspend/Resume button pressed. |
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Standby Mode | Resume system logic remains powered | ■ | Standby timeout occurs. |
and RAM remains powered to maintain | ■ | Suspend request issued by software or by pressing | |
| active data. All other devices are turned |
| the Suspend/Resume button. |
| off. | ■ | Low battery. |
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Hibernation Mode | Windows saves desktop state (including | ■ | Suspend timeout occurs. |
open files and documents) to hard disk. | ■ | Clicking Start | |
| CPU stops. All other devices are turned |
| (It may be necessary to Enable Hibernate Support |
| off. |
| from Windows Power Options.) |
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| ■ | Low battery condition |
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Power Off | System is fully powered off except for | ■ | System shutdown. |
| logic components required for Suspend/ | ■ | Low battery condition |
| Resume button and |
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| operation. |
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| Table | ||
SUSPEND/RESUME BUTTON
When your notebook is active, the Suspend/Resume button can be used to manually put your system into Standby mode. Push the Suspend/Resume button to the right 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
If your notebook is suspended, pushing the Suspend/ Resume button will return your system to active opera- tion. You can tell whether or not your system is in Standby mode by looking at the Power indicator. 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)
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 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’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
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