Random issues with xhci

[Sean Bruno]

On Thu, 2014-07-31 at 18:11 +0200, Hans Petter Selasky wrote:
> Best way to debug is to log all USB traffic:
> 
> usbdump -i usbusX -s 65536 -w usblog.pcap
> 
> Then try to see if there are any USB errors happening before the XHCI 
> controller resets.
> 
> Thank you!
> 
> --HPS


Hrm ... seems to most reliably happen on host startup and not really
able to reproduce after multiuser.

I see stuff like this:

usbd_setup_device_desc: getting device descriptor at addr 2 failed,
USB_ERR_IOERROR
usbd_req_re_enumerate: addr=2, set address failed! (USB_ERR_IOERROR,
ignored)
usbd_setup_device_desc: getting device descriptor at addr 2 failed,
USB_ERR_IOERROR
ugen1.2: <Belkin> at usbus1
cd0 at ahcich4 bus 0 scbus4 target 0 lun 0
cd0: <SONY DVD RW DRU-800A KY06> Removable CD-ROM SCSI-0 device 
cd0: 150.000MB/s transfers (SATA 1.x, UDMA4, ATAPI 12bytes, PIO
8192bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present
Trying to mount root from zfs:zroot []...
usbd_req_re_enumerate: addr=2, set address failed! (USB_ERR_IOERROR,
ignored)
usbd_setup_device_desc: getting device descriptor at addr 2 failed,
USB_ERR_IOERROR
ugen1.3: <Prolific Technology Inc.> at usbus1
usbd_req_re_enumerate: addr=2, set address failed! (USB_ERR_IOERROR,
ignored)
usbd_setup_device_desc: getting device descriptor at addr 2 failed,
USB_ERR_IOERROR
usbd_req_re_enumerate: addr=2, set address failed! (USB_ERR_IOERROR,
ignored)
usbd_setup_device_desc: getting device descriptor at addr 2 failed,
USB_ERR_IOERROR
ugen3.2: <Unknown> at usbus3 (disconnected)
uhub_reattach_port: could not allocate new device
ums0: <Logitech USB Receiver, class 0/0, rev 2.00/24.00, addr 1> on
usbus0
ums0: 16 buttons and [XYZT] coordinates ID=2
uhid0: <Logitech USB Receiver, class 0/0, rev 2.00/24.00, addr 1> on
usbus0
uaudio0: <vendor 0x046d product 0x08c5, class 0/0, rev 2.00/0.05, addr
2> on usbus2
uaudio0: No playback.
uaudio0: Record: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm6: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
uhid1: <Belkin Belkin UPS, class 0/0, rev 1.10/0.01, addr 2> on usbus1