Enabling or disabling the BIOS Serial Console Port
Use the BIOS Serial Console Port option to redirect video and keystrokes through the serial port to operating system boot.
NOTE:
This option can interfere with nonterminal devices attached to the serial port. In such cases, set this option to disabled.
NOTE:
This option is only supported in English language mode when running in the UEFI preboot System Utilities.
Procedure