Dell Latitude 7400 Setup And Specifications page 23

Table 23. System Configuration(continued)
Option
Thunderbolt™ Auto Switch
USB PowerShare
Audio
Keyboard Illumination
Keyboard Backlight Timeout on AC
Keyboard Backlight Timeout on Battery
Description
• Display Port and USB Only
This option configures the method used by the Thunderbolt
controller to perform PCIe device enumeration.
• Auto Switch : The BIOS will automatically switch between
BIOS Assist and Native Thunderbolt PC device enumeration
modes to get all benefits of the installed OS
• Native Enumeration: The BIOS will program the Thunderbolt
controller to Native mode ( Auto Switching is disabled)
• BIOS Assist Enumeration: The BIOS will program the
Thunderbolt controller to BIOS Assist mode ( Auto Switching is
disabled)
NOTE: A reboot is required for these changes to take
effect.
This option enable/disable the USB PowerShare feature behavior.
This option is disabled by default.
Allows you to enable or disable the integrated audio controller. By
default, the Enable Audio option is selected.
The options are:
• Enable Microphone
• Enable Internal Speaker
This option is set by default.
This field lets you choose the operating mode of the keyboard
illumination feature.
• Disabled: The Keyboard illumination will always be off or 0%.
• Dim: Enable the keyboard illumination feature at 50%
brightness.
• Bright (Enabled by Defualt): Enable the keyboard
illumination feature at 100% brightness level.
NOTE: Option present on system opted with backlit
keyboard.
This feature defines the timeout value for the keyboard backlight
when an AC adapter is plugged into the system.
Options are:
• 5 seconds
• 10 seconds(Default)
• 15 seconds
• 30 seconds
• 1 minute
• 5 minute
• 15 minute
• Never
NOTE: Option present on system opted with backlit
keyboard.
This feature defines the timeout value for the keyboard backlight
when the system is running only on battery power.
System setup 23