Acer Extensa 610 User Manual page 60

In this situation, there are four ways to enter hibernation mode:
Press the sleep hot key Fn-F7 (
[Hibernate]
Set a value for the System Sleep Timer in Setup with System Sleep
Mode set to
elapses without any system activity, the system goes into hibernation
mode
Enable the Sleep Upon Battery-low parameter in Setup. If a battery-
low condition takes place, the notebook enters hibernation mode in
about five minutes. See section 3.1.6.
Invoked by the operating system power saving modes
When the notebook enters hibernation mode, the whole system does not
consume any power. This is why hibernation mode is also called zero-volt
suspend.
To exit hibernation mode, press the power switch (
resumes from hibernation mode if the resume timer is set and matched.
Power
.
[Hibernate]
If the notebook beeps but does not enter hibernation mode
after pressing the sleep hot key, it means the operating system
does not allow the notebook to enter the power saving mode.
Do not change any system devices when the notebook is in
hibernation mode.
If the notebook detects a PC I/O card installed in the PC card
slots, the notebook can only enter standby mode, and not
hibernation mode.
) with System Sleep Mode set to
. If the waiting time specified by this time
). The notebook also
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