User Manual
Page 55
Select UEFI Setup Only to disable legacy USB support. Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB compatibility issues it is recommended to support USB devices under the UEFI setup and Windows/Linux operating systems only. 51 English 4.3.7 USB Configuration Q1900M / D1800M USB Controller Enable or disable all the USB 3.0 ports. USB 3.0 Controller Enable or disable all the USB ports.
Select UEFI Setup Only to disable legacy USB support. Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB compatibility issues it is recommended to support USB devices under the UEFI setup and Windows/Linux operating systems only. 51 English 4.3.7 USB Configuration Q1900M / D1800M USB Controller Enable or disable all the USB 3.0 ports. USB 3.0 Controller Enable or disable all the USB ports.