Very odd USB events yesterday

In the message log I saw a very strange, long list of events that I simply
can't understand. There was no connection of any USB device during these
events. No idea what might have triggered them.

Here is my usbconfig:
# usbconfig
ugen0.1: <XHCI root HUB Intel> at usbus0, cfg=0 md=HOST spd=SUPER (5.0Gbps)
pwr=SAVE (0mA)
ugen1.1: <XHCI root HUB Intel> at usbus1, cfg=0 md=HOST spd=SUPER (5.0Gbps)
pwr=SAVE (0mA)
ugen1.2: <Integrated Camera Bison Electronics Inc.> at usbus1, cfg=0
md=HOST spd=HIGH (480Mbps) pwr=ON (500mA)
ugen1.3: <AX211 Bluetooth Intel Corp.> at usbus1, cfg=0 md=HOST spd=FULL
(12Mbps) pwr=ON (100mA)

Here are about 42 lines of log which show the first of several similar
series:
Oct 25 11:05:54 ptavv kernel: ugen1.4: <vendor 0x0a12 product 0x4010> at
usbus1
Oct 25 11:05:54 ptavv kernel: uhub2 on uhub1
Oct 25 11:05:54 ptavv kernel: uhub2: <vendor 0x0a12 product 0x4010, class
9/0, rev 2.00/15.84, addr 4> on usbus1
Oct 25 11:05:55 ptavv kernel: uhub2: 4 ports with 0 removable, bus powered
Oct 25 11:05:55 ptavv kernel: ugen1.5: <QTIL QCC3034> at usbus1
Oct 25 11:05:55 ptavv kernel: umass0 on uhub2
Oct 25 11:05:55 ptavv kernel: umass0: <QTIL QCC3034, class 0/0, rev
2.00/15.83, addr 5> on usbus1
Oct 25 11:05:55 ptavv kernel: umass0:  SCSI over Bulk-Only; quirks = 0x0
Oct 25 11:05:55 ptavv kernel: umass0:1:0: Attached to scbus1
Oct 25 11:05:55 ptavv kernel: usbhid0 on uhub2
Oct 25 11:05:55 ptavv kernel: usbhid0: <QTIL QCC3034, class 0/0, rev
2.00/15.83, addr 5> on usbus1
Oct 25 11:05:55 ptavv kernel: hidbus0: <HID bus> on usbhid0
Oct 25 11:05:55 ptavv kernel: usbhid1 on uhub2
Oct 25 11:05:55 ptavv kernel: usbhid1: <QTIL QCC3034, class 0/0, rev
2.00/15.83, addr 5> on usbus1
Oct 25 11:05:55 ptavv kernel: hidbus1: <HID bus> on usbhid1
Oct 25 11:05:55 ptavv kernel: hkbd0: <QTIL QCC3034 Keyboard> on hidbus1
Oct 25 11:05:55 ptavv kernel: kbd2 at hkbd0
Oct 25 11:05:55 ptavv kernel: usbhid2 on uhub2
Oct 25 11:05:55 ptavv kernel: usbhid2: <QTIL QCC3034, class 0/0, rev
2.00/15.83, addr 5> on usbus1
Oct 25 11:05:55 ptavv kernel: da0 at umass-sim0 bus 0 scbus1 target 0 lun 0
Oct 25 11:05:55 ptavv kernel: da0: <  0001> Removable Direct Access SPC-2
SCSI device
Oct 25 11:05:55 ptavv kernel: da0: Serial Number ABCDEF0123456789
Oct 25 11:06:02 ptavv kernel: ugen1.4: <vendor 0x0a12 product 0x4010> at
usbus1 (disconnected)
Oct 25 11:06:02 ptavv kernel: uhub2: at uhub1, port 7, addr 4 (disconnected)
Oct 25 11:06:02 ptavv kernel: ugen1.5: <QTIL QCC3034> at usbus1
(disconnected)
Oct 25 11:06:02 ptavv kernel: umass0: at uhub2, port 1, addr 5
(disconnected)
Oct 25 11:06:02 ptavv kernel: da0 at umass-sim0 bus 0 scbus1 target 0 lun 0
Oct 25 11:06:02 ptavv kernel: da0: <  0001>  s/n ABCDEF0123456789 detached
Oct 25 11:06:02 ptavv kernel: (da0:umass-sim0:0:0:0): Periph destroyed
Oct 25 11:06:02 ptavv kernel: umass0: detached
Oct 25 11:06:02 ptavv kernel: usbhid0: at uhub2, port 1, addr 5
(disconnected)
Oct 25 11:06:02 ptavv kernel: hcons0: detached
Oct 25 11:06:02 ptavv kernel: hidbus0: detached
Oct 25 11:06:02 ptavv kernel: usbhid0: detached
Oct 25 11:06:02 ptavv kernel: usbhid1: at uhub2, port 1, addr 5
(disconnected)
Oct 25 11:06:02 ptavv kernel: hkbd0: detached
Oct 25 11:06:02 ptavv kernel: hidbus1: detached
Oct 25 11:06:02 ptavv kernel: usbhid1: detached
Oct 25 11:06:02 ptavv kernel: usbhid2: at uhub2, port 1, addr 5
(disconnected)
Oct 25 11:06:02 ptavv kernel: hidbus2: detached
Oct 25 11:06:02 ptavv kernel: usbhid2: detached
Oct 25 11:06:02 ptavv kernel: uhub2: detached

There were multiple sequences of this over a period of about 2 hours. They
were not continuous. There were gaps of a few seconds to almost 2 hours.
All sequences started with hub2 connected and ended with it disconnected.
The last sequence ended at 13:02:14 and was followed by:
Oct 25 13:02:14 ptavv kernel: usbd_req_re_enumerate: addr=12, set address
failed! (USB_ERR_IOERROR, ignored)
Oct 25 13:02:16 ptavv kernel: usbd_setup_device_desc: getting device
descriptor at addr 12 failed, USB_ERR_IOERROR
Oct 25 13:02:17 ptavv kernel: usbd_req_re_enumerate: addr=12, set address
failed! (USB_ERR_IOERROR, ignored)
Oct 25 13:02:20 ptavv kernel: usbd_setup_device_desc: getting device
descriptor at addr 12 failed, USB_ERR_IOERROR
Oct 25 13:02:20 ptavv kernel: ugen1.4: <vendor 0x0a12 product 0x4010> at
usbus1 (disconnected)
That sequence never showed up before the final sequence.

Any clues what the heck this was?
-- 
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman@gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683