Reference Guide

BIOS Settings Name Description Supported
Operating
System(s)
Possible values are:
• 0 – 7.5 Watts
• 1 – 15 Watts
UART Power Down
Allow the operating system to power down or Prohibit OS from
powering down UART.
Possible values are:
• Disabled
• Enabled
Windows
Uefi Boot Path Security
Determines whether the system should prompt the user to enter
the Admin password, if set, while booting from a UEFI boot path,
from the F12 Boot Menu.
Possible values are:
• Always except internal hdd — All UEFI boot paths require
the user to enter the Admin password, except for the boot
paths that are hosted on an internal hard disk drives.
• Always Except Internal HDD and PXE - All UEFI boot paths
requires the Admin password, except for boot paths hosted
on internal hard disk drives or PXE Boot.
• Always — Booting from any UEFI boot path requires the
user to enter the Admin password.
• Never — The Admin password is not required for booting
from UEFI boot paths.
Windows, Linux
UEFI Network Stack
Possible values are:
• Enabled — UEFI networking protocols are available
permitting preOS image of the network, including PXE.
• Disabled — UEFI networking protocols are not available in
the preOS environment and network boot by PXE is
Disabled. This setting will improve boot times.
Windows, Linux
UEFI Capsule
Enables or Disables BIOS updates via UEFI capsule update
packages.
Possible values are:
• Enabled
• Disabled
NOTE: Disabling this option blocks the BIOS updates
from services such as Windows Update and Linux
Vender Firmware Service (LVFS).
Windows, Linux
Unobtrusive Mode
Enables or Disables the <Fn><B> key combination, which
controls the light emissions from the system.
Possible values are:
• Disabled — Disables the <fn><B> key combination
• Enabled — Enables the <fn><B> key combination
Windows, Linux
USB
Enables, Disables, or sets the system's USB port to No Boot (if
supported).
Possible values are:
• Disabled
• Enabled
Windows
BIOS settings supported in Dell Command | Monitor 10.3 297