Lenovo E420 Laptop User Manual


 
Table 4. Cong menu items (continued)
Menu item
Submenu item Selection Comments
Optical Drive Speed
High Performance
Normal
Silent
Set the Optical Drive
Speed.
CPU Power Management
Disabled
Enabled
Unless this power-saving
feature is disabled, it
stops the processor clock
automatically when there
is no system activity. You
usually don't need to
change this function.
PCI Express Power
management
Disabled
Enabled
Enables or disables a
feature that automatically
adjusts power management
when there is no PCI
Express activity. You
usually don't need to
change this function.
Power Control Beep
Disabled
Enabled
If this function is enabled,
a beep sounds when the
computer enters a power
management mode, when it
resumes operational mode,
and when the ac power
adapter is connected or
disconnected.
Low Battery Alarm Disabled
Enabled
Enable or disable the low
battery alarm.
Password Beep Disabled
Enabled
If you enable this function,
a beep sounds when
a password prompt is
displayed, and again if you
type a wrong password.
Beep and Alarm
Keyboard Beep Enabled
Disabled
Enable or disable keyboard
beep when unmanageable
key combinations are
pressed.
Serial ATA (SATA) SATA Controller Mode
Option
Compatibility
AHCI
Select SATA controller
operation mode. If you
select “Compatibility
mode”, serial SATA
controller operates in
compatibility mode.
Chapter 8. Advanced conguration 119