Re: [Alsa-user] Tascam US-122 and Raspberry Pi

[<jm...@vo...>]

> Gesendet: Mittwoch, 30. Oktober 2013 um 18:11 Uhr
> Von: "Daniel Mack" <zo...@gm...>
> On 10/30/2013 02:42 PM, jm...@vo... wrote:
> >> On 10/30/2013 11:39 AM, jm...@vo... wrote:
> >>>> On 10/30/2013 09:17 AM, jm...@vo... wrote:
> 
> >>> Sequence Error!(hcd_frame=10797 ep=8in;wait=2,frame=3). Most
> >>> probably some urb of usb-frame 2 is still missing. Cause could be
> >>> too long delays in usb-hcd interrupt handling.
> >> 
> >> We've recently fixed this by removing some code. Please try this
> >> patch:
> >> 
> >> 
> >> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?id=a9d14bc0b188a822e42787d01e56c06fe9750162
> >>
> > Ok, I applied the patch and recompiled the module. dmesg now shows no
> > error but I still get the input/output error.
> 
> Hmm, then I don't know right now. You should try some other USB audio
> device such as a headset, just to see whether the USB host controller
> has a general problem with isochronous transfers and such. If that works
> fine, I guess someone needs to look into the usx2y driver.

A Behringer UCG102 works without problems. Can you advice me on what to do to debug the error? 

>
> Best regards,
> Daniel

Thanks for your help!
Jochen