Lenovo ThinkPad L420 User Manual page 163

Table 4. Config menu items (continued)
Function
CPU Power Management
PCI Bus Power Management
Power On with AC Attach
Beep and Alarm
Power Control Beep
Low Battery Alarm
Password Beep
Keyboard Beep
Memory
Extended Memory Test
Serial ATA (SATA)
SATA Controller Mode Option:
CPU
Selection
• Disable
• Automatic
• Disable
• Automatic
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• AHCI
• Compatibility
Comments
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.
Unless this power-saving feature is disabled, it stops
the PCI bus clock automatically when there is no
system activity. You usually don't need to change
this function.
Enables or disables a feature that powers on the
system when ac power adapter is attached.
If enabled, the system is powered on when ac power
adapter is attached. When the system is in hibernate
state, the system resumes.
If disabled, the system is not powered on nor
resumed when ac power adapter is attached.
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.
Enable or disable the Low Battery Alarm.
Enable this option to have a beep sound when
the system is waiting for a power-on, hard disk,
or supervisor password. Different beeps will be
sounded when the entered password matches or
does not match the configured password.
Enable or disable keyboard beep when
unmanageable key combinations are pressed.
Enable or disable the Extended Memory Test and
initialization during boot. Enabling this function
will increase boot time. Recent operating systems
usually do not require Extended Memory Initialization.
If you select "AHCI," the Serial ATA controller
operates in AHCI mode. If you select "Compatibility,"
the Serial ATA controller operates in compatibility
mode.
.
Chapter 8 Advanced configuration
145