User Manual
Page 55
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 USB 3.0 Controller Enable or disable all the USB ports. Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. Select UEFI Setup Only to disable legacy USB support. 4.3.7 USB Configuration Q1900M / D1800M USB Controller Enable or disable all the USB 3.0 ports.
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 USB 3.0 Controller Enable or disable all the USB ports. Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. Select UEFI Setup Only to disable legacy USB support. 4.3.7 USB Configuration Q1900M / D1800M USB Controller Enable or disable all the USB 3.0 ports.