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Table 6. Startup menu items (continued)
Menu item
Selection Comments
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 mood, CSM
Support is not selectable.
Boot Mode
• Quick
• Diagnostics
Screen during POST:
• Quick: The ThinkPad logo screen
is displayed.
• Diagnostics: Test messages are
displayed.
Beep at POST completion:
• Quick: No. Sounds on error cases
only.
• Diagnostics: Yes. Always sounds.
“Ctrl-S” prompt for on-board
Ethernet:
• Quick: No.
• Diagnostics: Yes.
Memory testing during POST:
• Quick: Quick test (or no test).
• Diagnostics: Full test.
Testing other devices during POST:
• Quick: Minimum test (or no test).
• Diagnostics: Can perform
necessary testing for critical
devices.
Note: You also can enter the
Diagnostic mode by pressing Esc
during the POST.
Chapter 7. Advanced conguration 101