58 - Power Management
Sleep Mode
Sleep mode in Windows saves the contents of your system memory during periods of inactivity by
maintaining power to critical parts. This mode turns off the CPU, display, hard drive, and all other
internal components except those necessary to maintain system memory and for restarting.
Your notebook can be put in Sleep mode by:
•
Pressing the Power/Suspend/Resume button when your system is turned on.
•
Selecting
Sleep
or
Standby
from the Windows Shut Down menu.
•
Timing out from lack of activity.
•
Allowing the battery to reach the Dead Battery Warning condition.
Your notebook’s system memory typically stores the file on which you are working, open application
information, and any other data required to support operations in progress. When you resume
operation from Sleep mode, your notebook will return to the point where it left off. You must use the
Power/Suspend/Resume button to resume operation, and there must be an adequate power source
available, or your notebook will not resume.
■
I
F
RUNNING
YOUR
NOTEBOOK
ON
BATTERY
POWER
,
BE
AWARE
THAT
THE
BATTERY
CONTINUES
TO
DISCHARGE
WHILE
YOUR
NOTEBOOK
IS
IN
S
LEEP
MODE
,
THOUGH
NOT
AS
FAST
AS
WHEN
FULLY
OPERATIONAL
.
■
D
ISABLING
THE
P
OWER
/S
USPEND
/R
ESUME
BUTTON
PREVENTS
IT
FROM
BEING
USED
TO
PUT
THE
NOTEBOOK
INTO
S
LEEP
OR
H
IBERNATION
(S
AVE
-
TO
-D
ISK
)
MODE
. T
HE
BUTTON
RESUME
FUNCTION
CAN
’
T
BE
DISABLED
.
■
T
HE
S
LEEP
OR
H
IBERNATION
(S
AVE
-
TO
-D
ISK
)
MODE
SHOULD
NOT
BE
USED
WITH
CERTAIN
PC C
ARDS
. C
HECK
YOUR
PC C
ARD
DOCUMENTATION
FOR
MORE
INFORMATION
. W
HEN
PC C
ARDS
OR
EXTERNAL
DEVICES
ARE
IN
USE
, H
IBERNATION
(S
AVE
-
TO
-D
ISK
)
MODE
CANNOT
RETURN
TO
THE
EXACT
STATE
PRIOR
TO
SUSPENSION
,
BECAUSE
ALL
OF
THE
PERIPHERAL
DEVICES
WILL
BE
RE
-
INITIALIZED
WHEN
THE
SYSTEM
RESTARTS
.
■
I
F
YOUR
NOTEBOOK
IS
ACTIVELY
ACCESSING
INFORMATION
WHEN
YOU
ENTER
S
LEEP
OR
H
IBERNATION
MODE
,
CHANGES
TO
OPEN
FILES
ARE
NOT
LOST
. F
ILES
ARE
LEFT
OPEN
AND
MEMORY
IS
KEPT
ACTIVE
DURING
S
LEEP
MODE
OR
THE
MEMORY
IS
TRANSFERRED
TO
THE
INTERNAL
HARD
DRIVE
DURING
H
IBERNATION
MODE
.
■
T
HE
MAIN
ADVANTAGE
OF
USING
H
IBERNATION
(S
AVE
-
TO
-D
ISK
)
IS
THAT
POWER
IS
NOT
REQUIRED
TO
MAINTAIN
YOUR
DATA
. T
HIS
IS
PARTICULARLY
IMPORTANT
IF
YOU
WILL
BE
LEAVING
YOUR
NOTEBOOK
IN
A
SUSPENDED
STATE
FOR
A
PROLONGED
PERIOD
OF
TIME
. T
HE
DRAWBACK
OF
USING
H
IBERNATION
MODE
IS
THAT
IT
LENGTHENS
THE
POWER
DOWN
AND
POWER
UP
SEQUENCES
AND
RESETS
PERIPHERAL
DEVICES
.
