Lenovo ThinkPad X140e User Manual
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• Network Boot: Specify the top priority boot device to be used when the computer wakes from LAN.
• UEFI/Legacy Boot: Select system boot capability.
• UEFI/Legacy Boot Priority: Select a boot priority between UEFI and Legacy.
• Boot Mode: Enable or disable the diagnostics boot mode.
• Option Key Display: Choose whether to display the option key message when the system is booted.
• Boot device List F12 Option: Choose whether to display the pop-up list of the boot devices.
• Boot Order Lock: Enable or disable the default boot priority or customized boot priority.
The following table shows the contents of the Startup menu.
Notes:
• Some items are displayed on the menu only if the computer supports the corresponding features.
• Default values are in boldface.
Table 6. Startup menu items
Menu item
Selection
Comments
Boot
Refer to “Changing the startup
sequence” on page 90.
Network Boot
Refer to “Boot submenu” on page 90.
UEFI/Legacy Boot
• Both
– UEFI/Legacy Boot Priority
– UEFI First
– Legacy First
• UEFI Only
• Legacy Only
CSM Support (for UEFI Only)
• Yes
• No
Select system boot capability.
• Both: Select priority of boot
options between UEFI and Legacy.
• UEFI Only: The system will boot
from the UEFI enabled operating
system.
• Legacy Only: The system will boot
from any operating system other
than the UEFI enabled one.
Note: If you select UEFI Only,
the system cannot boot from the
bootable devices that do not have the
UEFI enabled operating system.
Compatibility Support Module (CSM)
is required for booting the legacy
operating system. If you select UEFI
Only, CSM Support is selectable.
For Both or Legacy Only mode, CSM
Support is not selectable.
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