Lenovo E425, E525 manual Menu item Submenu item Selection Comments

Table 4. Config menu items (continued)

Menu item	Submenu item	Selection		Comments
	Change to “F1–F12 keys”	•	Default	If you select “Default,”
		•	Legacy	pressing F1–F12 initiates
				special functions illustrated
				on each key. If you select
				“Legacy,” you can use
				F1–F12 as standard
				function keys.
Display	Boot Display Device	•	ThinkPad LCD	Select the display device
		•	Analog (VGA)	that is to be activated at
				boot time. This selection
		•	Digital on ThinkPad
				is effective for boot time,
				password prompt, and
				ThinkPad Setup.
	Graphics Device	•	Integrated Graphics	The Integrated Graphics
		•	Switchable Graphics	mode provides longer
				battery life, while the
				Switchable Graphics mode
				enhances performance.
	OS Detection for Switchable	•	Disabled	If you select “Enabled,” the
	Graphics	•	Enabled	system UEFI automatically
				switches the graphics
				device setting to Switchable
				Graphics mode if the
				operating system supports
				this feature, and to
				Integrated Graphics mode if
				the operating system does
				not support this feature.
Power	Optical Drive Speed	•	High Performance	Set the optical drive speed.
		•	Normal
		•	Silent
	CPU Power Management	•	Disabled	Unless this power-saving
		•	Enabled	feature is disabled, it
				stops the processor clock
				automatically when there
				is no system activity. You
				usually do not need to
				change this function.
	PCI Express Power	•	Disabled	Enables or disables a
	management	•	Enabled	feature that automatically
				adjusts power management
				when there is no PCI
				Express activity. You
				usually do not need to
				change this function.

Chapter 7. Advanced configuration 101