ADLINK IMB-M42H - Manual (Page 45)

UEFI Setup Utility 35
IMB-M42H
A.12 USB Configuration
USB Controller
Enables/disables the USB controller.
Intel USB 3.0 Mode
Enables/disables Intel USB 3.0 mode.
Legacy USB Support
Selects legacy support for USB devices, from default Enabled,
supporting legacy USB, Auto, supporting legacy USB when
devices are connected, and Disabled (if USB compatibility issues
occur, it is recommended to select Disabled to enter OS), and
UEFI Setup Only, in which USB devices are allowed only under
UEFI setup and Windows/Linux OS.