Lenovo ThinkPad Edge E420 - Page 136

Table4.Congmenuitems(continued)
Menuitem
SubmenuitemSelectionComments
Changeto“F1–F12keys”
•Default
•Legacy
Ifyouselect“Default”,
pressingF1–F12initiates
specialfunctionsillustrated
oneachkey.Ifyou
select“Legacy”,youcan
useF1–F12asstandard
functionkeys.
BootDisplayDevice
•ThinkPadLCD
•Analog(VGA)
•DigitalonThinkPad
Selectthedisplaydevice
thatistobeactiveatboot
time.Thisselectionis
effectiveforboottime,
passwordprompt,and
ThinkPadSetup.
GraphicsDevice•IntegratedGraphics
•SwitchableGraphics
IntegratedGraphics
provideslongerbatterylife,
andSwitchableGraphics
enhancesperformance.
Display
OSDetectionfor
SwitchableGraphics
•Disabled
•Enabled
Ifyouselect“Enabled,”the
systemUEFIautomatically
switchesthegraphics
devicesettingtoSwitchable
Graphicsmodeifthe
operatingsystemsupports
thisfeature,andto
IntegratedGraphicsmodeif
theoperatingsystemdoes
notsupportthisfeature.
IntelSpeedStep
®
technology(Intel
SpeedStepmounted
modelsonly)
•Disabled
•Enabled
ModeforAC
•MaximumPerformance
•BatteryOptimized
ModeforBattery
•MaximumPerformance
•BatteryOptimized
SelectthemodeofIntel
SpeedSteptechnologyin
theuserUEFIatruntime.
OpticalDriveSpeed
•HighPerformance
•Normal
•Silent
SettheOpticalDrive
Speed.
CPUPowerManagement
•Disabled
•Enabled
Unlessthispower-saving
featureisdisabled,it
stopstheprocessorclock
automaticallywhenthere
isnosystemactivity.You
usuallydon'tneedto
changethisfunction.
Power
PCIExpressPower
management
•Disabled
•Enabled
Enablesordisablesa
featurethatautomatically
adjustspowermanagement
whenthereisnoPCI
118UserGuide