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Power Management

Configuring Power Options of your PC or laptop running:

• Windows 2000, Windows XP
• Apple Mac OS X and higher

Windows XP / Windows 2000

Right-click on your desktop and select Properties.

The Display Properties panel will appear. Click on the tab Screen Saver.

On the Screen Saver tab, you can best select the Blank screen saver. Blanking the screen actually deactivates the monitor signal, so it really saves your screen, avoiding the use of fancy screen savers.

Click on the Power... button next to the ENERGY STAR logo to proceed to power saving options.

The Power Options panel appears. Here you can select a power scheme, or you can adjust the settings to your own preference such as the above.

Laptop computers have more options, namely for Running on batteries:

Next, select the Advanced tab. Here you can tell the computer what to do when pressing the power or sleep buttons (if available on your computer).

With laptop computers there is an extra setting when closing the lid:

Finally, on the Hibernate tab, you can activate hibernation.

Note: Not all software, notably demanding graphics software (CAD, games, etc.), support Hibernating equally well. So, if you experience any problems, change this option.

Windows XP only:

You can also use Windows help system to guide you through setting up your power options. To do this, please do the following:

• Click Start
• Click Help and Support
• In the search box, type: power options
  and press Enter.
• In the Search Results column, click on Common tasks: Power Options
• Follow the instructions.

You can also find this procedure on Microsoft's website on choosing your Power Scheme.

Apple Mac OS X and higher

1. Choose Apple menu > System Preferences, and then click Energy Saver.
2. Click Options. If you don't see the Options buttons, click Show Details.
3. Select any of the following options:

• To let your computer sleep but remain available to requests through the modem, select the checkbox labeled "Wake when the modem detects a ring."
• To let your computer sleep but remain available to network administrator access, select the checkbox labeled "Wake for Ethernet network administrator access."
  IMPORTANT: If you select this option, a Wake-on-LAN packet is required to wake the computer. Using the Terminal commands ssh and telnet will not wake the computer.
• To put your computer to sleep by pressing the power button once, select the checkbox labeled "Allow power button to sleep the computer." This option is available only on some computer models.
• To make your computer start up automatically after a power interruption, select the checkbox labeled "Restart automatically after a power failure."
  
  For PowerBooks and iBooks, choose Highest from the Processor Performance pop-up menu to allow your computer to work at its fastest. This uses more energy. Choose Reduced to save energy. This may cause your computer to work more slowly. Some models support the Automatic setting, which allows your computer to switch rapidly back and forth between the Highest and Reduced settings in order to optimize energy use, depending on how much work the processor is doing.

Note: This information comes from Mac Help, the help system installed with Mac OS X 10. To access Mac Help on your computer, choose Mac Help from the Finder's Help menu.

You can find the official description of Apple here: Setting sleep options for your computer.

For further reading download PC Power Management.pdf [PDF 240 kb].