[LAU] Problem with a Vestax VCI-100MKII controller

[Chris Caudle]

> I'm hoping you can shed some light on a problem I have with a DJ
> controller (Vestax VCI-100MKII) that's also a soundcard. My problem is
> that when I connect it, it keeps disconnecting.

There may be two unrelated things going on. You could try addressing this
first
just to see if it gets rid of some error messages:

> Nov 30 14:33:12 wintermute kernel: [  936.380745] usb 3-2: current rate
> 48000 is different from the runtime rate 44100

I think that may be indicating that the interface will only run at 48k, but
your software is currently attempting to open the interface with a 44.1k
setting.  Or possibly the reverse, but I think indicating the device runs
at 48k.

> Nov 30 14:33:12 wintermute kernel: [  936.386780] usbhid 3-2:1.5: can't
> add hid device: -71
> Nov 30 14:33:12 wintermute kernel: [  936.386793] usbhid: probe of 3-
> 2:1.5 failed with error -71

I found the errno program to convert the error number to descriptions:
~]$ errno 71
EPROTO 71 Protocol error

That seems like the USB stack complaining that device does not implement
 USB protocol correctly, or possibly is not responding correctly for a USB
HID type device.

The newer laptop does not get the same error (the complaint about sample
rate is still present).

> Nov 30 15:45:00 ono-sendai kernel: [107245.725923] usb 3-8.3: 2:1:
> cannot set freq 44100 to ep 0x82
> Nov 30 15:45:00 ono-sendai kernel: [107245.732227] usbhid 3-8.3:1.5:
> can't add hid device: -32
> Nov 30 15:45:00 ono-sendai kernel: [107245.732236] usbhid: probe of 3-
> 8.3:1.5 failed with error -32

I do not understand the error 32 generation:
$ errno 32
EPIPE 32 Broken pipe

-- 
Chris Caudle