[alsa-devel] Problem with USB Class 2 Audio Driver

[Alan Stern]

On Mon, 6 Sep 2010, Demian Martin wrote:

> Sorry for the slow response, the communications were trapped by Yahoo's spam
> filter. More details to follow.
> 
> First, I switched to a more powerful platform (slightly) the Intel Atom
> D945GSEJT.
> I have managed to get Win & to run on this and it allowed me to test the

Windows 7?

> same hardware doing the same task (as much as Windows permits). I can using
> adjacent USB ports boot Win & and play 192 KHz content through to the
> Wavelink 192 KHz USB audio interface without problems. This suggests (but
> isn't absolute proof) that the hardware is not a restriction.
> 
> Second, trying the suggestions below I noticed an error making this more
> difficult. When connecting the Wavelink I see its accessible from ALSA:
> auraliti-player:~# aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 1: SPDIF [WaveLink HS SPDIF], device 0: USB Audio [USB Audio]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> 
> But invisible to lsusb. Its device 009 below:

What do you mean by "invisible"?  It's plainly visible as device 009,
as you point out.

> auraliti-player:~# lsusb
> Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 002 Device 006: ID 413c:3012 Dell Computer Corp. Optical Wheel Mouse
> Bus 002 Device 005: ID 413c:2006 Dell Computer Corp.
> Bus 002 Device 004: ID 10d5:000d Uni Class Technology Co., Ltd
> Bus 002 Device 003: ID 413c:1004 Dell Computer Corp.
> Bus 002 Device 002: ID 058f:9254 Alcor Micro Corp. Hub
> Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 001 Device 009: ID 21b4:0210
> Bus 001 Device 003: ID 1307:0163 Transcend Information, Inc. 256MB/512MB/1GB
> Flash Drive
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> 
> Here is the message when its installed:
> Sep  6 17:22:29 localhost vmunix: [ 1537.716042] usb 1-7: new high speed USB
> device using ehci_hcd and address 9
> Sep  6 17:22:29 localhost vmunix: [ 1537.830436] usb 1-7: config 1 has an
> invalid interface number: 3 but max is 2
> Sep  6 17:22:29 localhost vmunix: [ 1537.830518] usb 1-7: config 1 has no
> interface number 2
> Sep  6 17:22:29 localhost vmunix: [ 1537.830804] usb 1-7: config 1 has an
> invalid interface number: 3 but max is 2
> Sep  6 17:22:29 localhost vmunix: [ 1537.830884] usb 1-7: config 1 has no
> interface number 2
> Sep  6 17:22:29 localhost vmunix: [ 1537.833069] usb 1-7: configuration #1
> chosen from 2 choices

The stupid firmware lists config 1 twice!  And within config 1, it has 
interfaces 0, 1, and 3!  Nevertheless, it should still work.

> I need to figure out how to install usbmon on this debian platform before I
> can get a trace. I may be able to borrow a USB sniffer if that helps.

There's probably nothing to install.  Try just following the 
instructions.

Alan Stern