The "Energy Saver" preferences allow you to specify settings for the display, hard disk, and system sleep, as well as to schedule shut downs and start ups. The settings can reduce the amount of power your computer uses when idle. These settings are especially important for PowerBook and iBook owners running off battery power.

If you have a PowerBook or iBook, you can configure the options differently for different uses. There are different options to optimize your energy settings that are standard, and you can customize these.

 

Additionally you can set different options if you are running off the power adapter or the battery.

Configure Sleep options

Click the "Sleep" tab to display the options

 

Drag the sliders to the desired time to set the interval after which the computer will go to sleep if it has been inactive. To prevent your computer from going to hard sleep, where you may not be able to wake up the computer, uncheck the box "Put the hard disk(s) to sleep when possible."



Schedule Start Up and Shut Down

Click the "Schedule" tab

 

To start the computer automatically, check the box next to "Start up the computer" and then set the options.

 

To shut the computer down at a certain time, check the box next to "Shut Down" and set the options. You may also just put the computer to sleep instead of shutting down.

 

Set Energy Saver Options

Click the "Options" tab

Wake when the modem Detects a ring
Wakes the computer from sleep when the modem detects an incoming call.

Wake for Ethernet network administrator access
Wakes the computer from sleep when it detects a Wake-on-LAN packet.

Allow power button to sleep the computer
Puts the computer to sleep when you press the power button. (This option may or may not be there depending on your computer).

Restart automatically after a power failure
Restarts the computer when power is restored after a power failure. This is useful if your computer is running as a server.