Hibernation Mode - Lenovo ThinkPad X201 Tablet 3093 Hardware Maintenance Manual

Also, in either of the following events, the computer automatically returns from
sleep (standby) mode and resumes operation:
v The ring indicator (RI) is signaled by a serial device or a PC Card device.
v The time set on the resume timer elapses.
Note: The computer does not accept any input immediately after it enters sleep
(standby) mode. Wait a few seconds before taking any action to reenter
operation mode.

Hibernation mode

In hibernation mode, the following occurs:
v The system status, RAM, VRAM, and setup data are stored on the hard disk.
v The system is powered off.
To cause the computer to enter hibernation mode, do any of the following:
v Press the Fn+F12 keys.
v If you have defined one of the following actions as the event that causes the
system to go into hibernation mode, perform that action.
– Closing the lid.
– Pressing the power button.
– Pressing Fn+F4 keys.
Also, the computer goes into hibernation mode automatically in either of the
following conditions:
v If a "hibernation time" has been set on the timer, and if the user does not do
any operation with the keyboard, the TrackPoint, the hard disk drive, the
parallel connector, or the diskette drive within that time.
v If the timer conditions are satisfied in suspend mode.
When the power is turned on, the computer returns from hibernation mode and
resumes operation. The hibernation file in the boot record on the hard disk drive is
read, and system status is restored from the hard disk drive.
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