Usb Coniguration; Usb Controller; Legacy Usb Support - ASROCK H81M-HDS User Manual

4.4.7 USB Coniguration

USB Controller

Enable or disable all the USB 2.0 ports.
USB 3.0 Controller
Enable or disable all the USB 3.0 ports.

Legacy USB Support

Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB
compatibility issues it is recommended to disable legacy USB support. Select UEFI
Setup Only to support USB devices under the UEFI setup and Windows/Linux
operating systems only.
Legacy USB 3.0 Support
Enable or disable Legacy OS Support for USB 3.0 devices.
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