XHCI and USB 2 soundcard

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Hello all,

I have two usb soundcards at home and my laptop has both EHCI and XHCI
usb ports.

The M-Audio Fast-Track Ultra (USB 2) is not recognized by ALSA when
plugged on a USB 3 (XHCI) port on the kernel 3.9.

I'm trying to figure out where the problem lies to report the issue to
the proper team: is it with XHCI or with ALSA?

In dmesg, this is what happens when the FTU is plugged:
[  107.461175] usb 3-1: new high-speed USB device number 3 using xhci_hcd
[  107.481695] usb 3-1: config 1 interface 3 altsetting 0 bulk
endpoint 0x7 has invalid maxpacket 8
[  107.481705] usb 3-1: config 1 interface 3 altsetting 0 bulk
endpoint 0x87 has invalid maxpacket 8
[  107.483384] usb 3-1: New USB device found, idVendor=0763, idProduct=2080
[  107.483392] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  107.483398] usb 3-1: Product: Fast Track Ultra
[  107.483403] usb 3-1: Manufacturer: M-Audio
[  107.483886] xhci_hcd 0000:04:00.0: ERROR: unexpected command
completion code 0x11.
[  107.483899] usb 3-1: can't set config #1, error -22

The device is seen by lsusb, but I don't think it really means much:
Bus 003 Device 004: ID 0763:2080 Midiman M-Audio RunTime DFU

aplay -l only doesn't show the sound card, even if I try to modprobe
snd-usb-audio manually:
**** List of PLAYBACK Hardware Devices ****
card 0: MID [HDA Intel MID], device 0: 92HD81B1X5 Analog [92HD81B1X5 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

The same FTU soundcard works on the same machine when plugged on a
USB2 port (EHCI).
The Edirol UA-25Ex (USB1) works on this USB3 port.

What do you guys think?
Is the issue with XHCI or ALSA?

Thanks in advance for the help!

Aurélien
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