[LAU] USB sound card via Express Card adapter

[Joan Quintana]

Due to lack of bandwith with my internal USB bus, like we are discussing in another thread, I ordered a Trust SuperSpeed 2 Port USB 3.0 Laptop Express Card.

$ lsusb -v
...
1a:00.0 USB Controller: NEC Corporation Device 0194 (rev 03) (prog-if 30)
	Subsystem: NEC Corporation Device 0194
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at f0600000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci
...

$ lsusb
Bus 003 Device 002: ID 0582:00e6 Roland Corp. 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0c45:6406 Microdia 
Bus 001 Device 002: ID 8087:0020  
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 003: ID 045e:0084 Microsoft Corp. Basic Optical Mouse
Bus 002 Device 002: ID 8087:0020  
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I have a new USB bus, and my Edirol UA25-EX is the only device working in bus #3

$ cat /proc/asound/cards
 0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xf0a00000 irq 22
 1 [Generic        ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xcfedc000 irq 17
 2 [UA25EX         ]: USB-Audio - UA-25EX
                      EDIROL UA-25EX at usb-0000:1a:00.0-3, full speed

$ cat /proc/interrupts | grep usb
  16:         91         84         83         88   IO-APIC-fasteoi   ehci_hcd:usb1, ohci1394, xhci_hcd:usb3
  23:      10112         40       2241         34   IO-APIC-fasteoi   ehci_hcd:usb2

I have my device working on IRQ 16.

everything seems all right, so I start JACK, and I have this error.

---
$ /usr/bin/jackd -p1024 -t2000 -dalsa -dhw:2,0 -r44100 -p256 -n2 -Xraw

jackd 0.118.0
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

Memory locking is unlimited - this is dangerous. You should probably alter the line:
     @audio   -  memlock    unlimited
in your /etc/limits.conf to read:
     @audio   -  memlock    2937420
no message buffer overruns
JACK compiled with System V SHM support.
loading driver ..
SSE2 detected
apparent rate = 44100
creating alsa driver ... hw:2,0|hw:2,0|256|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:2
configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 2 periods
ALSA: final selected sample format for capture: 24bit little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 24bit little-endian
ALSA: use 2 periods for playback
ALSA: cannot set hardware parameters for playback
ALSA: cannot configure playback channel
cannot load driver module alsa
---

I suppose that the problem is not JACK related, is ALSA related:

$ aplay -v -D plughw:UA25EX /usr/share/sounds/alsa/Front_Left.wav
Playing WAVE '/usr/share/sounds/alsa/Front_Left.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
aplay: set_params:1053: Unable to install hw params:
ACCESS:  RW_INTERLEAVED
FORMAT:  S16_LE
SUBFORMAT:  STD
SAMPLE_BITS: 16
FRAME_BITS: 16
CHANNELS: 1
RATE: 48000
PERIOD_TIME: (125011 125012)
PERIOD_SIZE: [6000 6000]
PERIOD_BYTES: (12000 12002)
PERIODS: (3 4)
BUFFER_TIME: 500000
BUFFER_SIZE: 24000
BUFFER_BYTES: 48000
TICK_TIME: 0

Another thing: the device is listed in 
$ cat /proc/bus/pci/devices | grep xhci
and not in
$ cat /proc/bus/usb/devices

Aany ideas?

Thanks in advance,
Joan Quintana