Dell PowerEdge C5220 - Manual (Page 40)

40 Using the System Setup Program
USB Configuration
Menu Fields Settings Comments
Advanced\USB Configuration
Embedded USB Controller Disabled
Enabled*
Disables/Enables the built-
in USB controller at system
startup.
Legacy USB Support Disabled
Enabled* Enables Legacy USB
support. Disable option
keeps USB devices
available only for EFI
applications.