IBM Aptiva Hardware Maintenance Manual page 43

Power Management Mode
When the Power Management Mode parameter is set to Enabled, you can
configure the different power saving timers to your desired settings. Setting
this parameter to Disabled deactivates the power management feature and all
the timers. The default setting is Enabled.
IDE hard disk standby timer This parameter allows the hard disk to enter
standby mode after inactivity of 1 to 15 minutes, depending on your setting.
When you access the hard disk again, allow 3 to 5 seconds (depending on the
hard disk) for the system to recover and return to normal speed. Set this
parameter to Off if your hard disk does not support this function. The default
setting is Off.
System sleep timer This timer allows you to set the period of inactivity (in
minutes) before the system enters the sleep state. Use the arrow keys to
select a setting. You can turn this timer to Off if you prefer. The default setting
is 60 minutes.
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Stop CPU clock in sleep state When set to Yes, the system
internal clock stops, along with other internal devices, when the
computer enters the sleep state. When set to No, the system
internal clock continues to run when the system is in the sleep
state. This item turns gray and is non-configurable when the
System Sleep Timer is off. The default setting is Yes.
Power Switch< 4 sec.
When set to Suspend, this parameter adds the suspend function to the
system power button on the front panel. The suspend function allows you to
put the system into suspend mode by pressing the power button for less than
four seconds while the system is on. When this parameter is set to Power off,
the power button simply turns the system power on or off. This parameter is
set to Power off by default.
Modem Wake-Up on Ring
This parameter allows you to enable or disable the Modem Wake-Up on Ring
feature. When enabled and if the computer is in suspend, an incoming call
automatically resumes normal power on mode. When disabled, the system
does not return to the "normal on" state even if there is an incoming modem
access. The default setting is Enabled.
NOTE: Machine Type 2137 and 2138 both have modem ring-in wake-up
feature. 2138 doesn't need a modem ring-in wake-up cable because
the BIOS monitors modem IRQ signal.
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