Start dtpower as superuser (see "Starting the Power Manager Program: dtpower").
Drag the Suspend slider to the number of minutes of idle time you want before the system will power down automatically.
If you want to completely deactivate the AutoShutdown feature, select the Never setting at the far right of the slider. A dash symbol (-) appears in the numeric box when AutoShutdown is deactivated.
Also, you can type the number of minutes directly in the numerical box to the right of the slider.
Consecutive AutoShutdowns won't occur less than 5 minutes apart, even if the idle time setting is under 5 minutes.
Select the start time of the period each day when you want AutoShutdown to be able to occur.
You can select the time (in 15-minute increments) through a menu that drops down from the button to the left of the numerical box.
Also, you can type the start time directly into the numerical box.
Click AM or PM for the start time.
Select the finish time of the period each day when you want AutoShutdown to be able to occur.
You can select the time (in 15-minute increments) through a menu that drops down from the button to the left of the numeric box. The last setting on this menu is All Day, which means AutoShutdown can occur at any time of day.
Also, you can type the finish time directly into the numerical box and press the enter key. You can specify an "All Day" setting this way by entering a finish time that is identical to the start time.
Click AM or PM for the finish time.
Click the Apply button when all the settings you want are displayed.
If you want to reject the displayed settings, select Reset; the currently active settings (that is, whatever settings were last put into effect by selecting Apply) will be displayed in the window.
In Figure 3-3, the dtpower window is set for AutoShutdown to occur after 90 minutes of idle time between 7:30 pm and 9:00 am.
In Figure 3-4, the dtpower window is set to disable AutoShutdown of this system. Note that a dash appears in the numeric box showing the idle time.