Lenovo ThinkPad X1 Extreme, User Manual

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Description: If you select Enabled , you can press (instead of press and hold) the Fn key to keep it in a
pressed condition. Then press the desired function key. The action is equivalent to pressing the function
key simultaneously with the Fn key. When you press the Fn key twice, the Fn key is locked in the pressed
condition until you press the Fn key again.
• F1–F12 as Primary Function
Values: Disabled , Enabled
Description: If you select Enabled , pressing the function keys directly inputs F1–F12. If you select
Disabled , pressing the function keys directly initiates the special function printed as an icon on each key.
To temporarily switch the above two functions, press Fn+Esc.
Display
• Boot Display Device
Values: ThinkPad LCD , External Display
Description: Select the display device that you want to activate at boot time. External Display refers to an
external display attached to the USB Type-C connector or HDMI connector on ThinkPad. If multiple
displays are attached, the boot screen appears on the first recognized one. This menu is selectable when
Graphics Device is Discrete Graphics.
• Graphics Device
Values: Discrete Graphics, Hybrid graphics
Description: Discrete Graphics mode will achieve higher graphics performance. Hybrid Graphics mode
runs as Integrated Graphics mode to achieve longer battery life, and Discrete Graphics is enabled on
demand.
• Total Graphics Memory
Values: 256 MB , 512 MB
Description: Allocate the total memory which Intel internal graphics shares.
Note: If you select 512 MB , the maximum usable memory might be reduced on the 32–bit operating
system.
• Boot Time Extension
Values: Disabled , 1 second, 2 seconds, 3 seconds, 5 seconds, 10 seconds
Description: During the boot process, the computer might not detect the external monitors that need more
time to get ready. Select how long you want to extend the boot process.
Power
• Intel (R) SpeedStep technology
Values: Disabled, Enabled
Description: Select the mode of Intel SpeedStep technology at runtime.
– Mode for AC
Values: Maximum Performance , Battery Optimized
Description: Maximum Performance : Always the highest speed
– Mode for Battery
Values: Maximum Performance, Battery Optimized
Description: Battery Optimized : Always the lowest speed
• Adaptive Thermal Management
Description: Select a thermal management scheme to use. The scheme affects fan sound, temperature,
and performance.
Chapter 5
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Advanced configuration
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