Lenovo ThinkPad L520 (English) User Guide - Page 163
Function, Selection, Comments, Automatic, Disabled, Beep and Alarm, Enabled, Memory, Serial ATA
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Table 4. Config menu items (continued) Function Selection CPU Power Management • Disable • Automatic PCI Bus Power Management • Disable • Automatic Power On with AC Attach • Enabled • Disabled Beep and Alarm Power Control Beep Low Battery Alarm Password Beep • Enabled • Disabled • Enabled • Disabled • Enabled • Disabled Keyboard Beep Memory Extended Memory Test • Enabled • Disabled • Enabled • Disabled Serial ATA (SATA) SATA Controller Mode Option: • AHCI • Compatibility CPU 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