Dell Precision M40 - Manual (Page 44)

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Conserving Power: Dell Precision™ Mobile Workstation M40 User's Guide
Management Tips
l
Connect the computer to an electrical outlet when possible, because the battery life expectancy is largely determined by the number of times
it is charged.
l Place the computer in standby mode or hibernate mode when you leave the computer unattended for long periods of time.
l If you are going to connect your computer to a port replicator or a docking station, click None (or Do nothing) when you program the
display-close option in the
Advanced tab in the Microsoft ® Windows® Power Options Properties window.
l
To exit a power management mode, press the power button.
Power Management Modes
Standby Mode
Standby mode conserves power by turning off the display and the hard drive after a predetermined period of inactivity (a time-out). When you exit
standby mode, the computer returns to the same state it was in before entering standby mode.
NOTICE: If your computer loses AC and battery power while in standby mode, you may lose data.
To enter standby mode:
l In Microsoft Windows 2000, click the Start button, click Shutdown, click Standby, and then click OK.
or
l Depending on how you set the power management options in the Advanced tab, use one of the following methods:
¡ Press the power button.
¡ Close the display.
¡ Press the power management keyboard shortcut (sometimes referred to as the "sleep button"), .
If an external monitor is connected to the computer when you close the display, the computer does not enter standby mode. You can still use the
external monitor.
To exit standby mode, press the power button or open the display depending on how you set the options in the Advanced tab.
Hibernate Mode (Suspend-to-Disk Mode)
Hibernate mode (also called suspend-to-disk or S2D mode) conserves power by copying system data to a reserved area on the hard drive and
then completely turning off the computer. When you exit hibernate mode, the computer returns to the same state it was in before entering hibernate
mode.
NOTICE: You cannot remove devices or undock your computer while in hibernate mode.
Your computer enters hibernate mode if the battery charge level becomes critically low.
Depending on how you set the power management options in the Advanced tab, use one of the following methods to enter hibernate mode:
l Press the power button.
l
Close the display.
l Press the power management keyboard shortcut (sometimes referred to as the "sleep button"), .
If an external monitor is connected to the computer when you close the display, the computer does not enter hibernate mode. You can still use the
external monitor.
Management Tips Power Options Properties
Power Management Modes ENERGY STAR ® Emblem
NOTE: See " About the Batteries " for more information on conserving battery power.
NOTE: You cannot exit standby mode or hibernate mode by pressing a key or touching the touch pad.
NOTE: Some PC Cards may not operate correctly after the computer exits hibernate mode. Remove and reinsert the card, or simply
restart (reboot) your computer.