error with virtual USB device

From: Chuck Tuffli <chuck_at_freebsd.org>
Date: Thu, 15 Feb 2024 23:36:29 UTC
Booting FreeBSD 14.0-RELEASE with a virtual USB device attached to my
server generates a (seemingly) endless stream of errors (below). What
is this error trying to tell me? What other sorts of diagnostics would
be useful to provide? TIA

usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
ugen0.4: <Unknown > at usbus0 (disconnected)
uhub_reattach_port: could not allocate new device
ums0 numa-domain 0 on uhub2
ums0: <iLO Virtual Keyboard, class 0/0, rev 2.00/0.02, addr 2> on usbus0
ums0: error reading report description
device_attach: ums0 attach returned 12
usb_alloc_device: set address 4 failed (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
usbd_req_re_enumerate: addr=4, set address failed! (USB_ERR_TIMEOUT, ignored)
usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_TIMEOUT
ugen0.4: <Unknown > at usbus0 (disconnected)