DRAGONFLY 'Live CD' README.USB

    When booting from 'Live CD', the USB subsystem is activated by the
    default boot.  This includes the primary USB, OHCI, EHCI and XHCI
    drivers. On some systems it might be needed to not start the EHCI
    driver (for USB 2.0) or XHCI driver (for USB 3.0) to be able to run
    DragonFly. This is done by:

    For EHCI
    ========

        - 'unset ehci_load' in loader prompt, or
        - choosing 'safe mode' in boot prompt, or
        - 'set hint.ehci.0.disabled=0' in /boot/loader.conf

    For XHCI
    ========

        - 'unset xhci_load' in loader prompt, or
        - choosing 'safe mode' in boot prompt, or
        - 'set hint.xhci.0.disabled=0' in /boot/loader.conf