ASROCK Z690M-ITX/ax - 4.6.5 USB Configuration

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4.6.5 USB Conguration
Legacy USB Support
Enable Legacy OS Support for USB devices. UEFI setup Only option will keep USB
devices available only for EFI applications.
XHCI Hand-o
is is a workaround for OSes without XHCI hand-o support. e XHCI
ownership change should be claimed by XHCI driver.