Lenovo ThinkPad E580 User Manual page 67

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, USB Type-C, HDMI, Display on dock
Description: Select the display device that you want to activate at boot time. This selection is effective for
boot time, password prompt, and ThinkPad Setup. USB Type-C corresponds to the USB Type-C
connector on your computer. HDMI corresponds to the HDMI connector on your computer. Display on
dock corresponds to the video connectors (such as the DVI or VGA connectors) on a docking station.
Boot screen is cloned to all displays on dock.
• Total Graphics Memory
Values: 256 MB, 512 MB
Description: Allocate the total memory which Intel
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
– 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
• CPU Power Management
Values: Disabled, Enabled
Description: Enable or disable the power-saving feature that stops the microprocessor clock automatically
when there are no system activities. Normally, it is not necessary to change the setting.
• Power On with AC Attach
Values: Disabled, Enabled
Description: Enable or disable a feature that turns on the computer when the ac power adapter is
attached.
• Disable Built-in Battery
Values: Yes, No
Description: Temporary disable battery for servicing the system. After selecting this item, the system will
be automatically powered off, then ready to be serviced.
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internal graphics shares.
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technology at runtime.
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Chapter 6 Advanced configuration
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