On Thu, Jan 30, 2014 at 12:05 AM, Clemens Ladisch <clemens@email-addr-hiddenwrote:
> Romain Michon wrote:
> > I'm trying to use two audio interfaces (Guitar Link UC6102) in
> > parallel in Alsa on a UDOO board that runs Ubuntu. The two interfaces
> > are connected on the two USB 2.0 port available on the board: I'm not
> > using any hub. In 20% of the cases, this works fine and I'm able to
> > use the two interface as one single "virtual" interface with 4 inputs
> > and 4 outputs (see my .asoundrc file bellow).
>
> So the hardware actually supports the required bandwidth.
>
Yep...
>
> > However, in 80% of the cases, this doesn't work and dmesg says:
> > "cannot submit datapipe for urb 0, error -28: not enough bandwidth".
>
> Sounds like a bug in the USB controller driver of your board.
>
You're right. I'll send an e-mail to the UDOO community, may be someone
had a similar issue... I'll keep you posted.
Thanks.
Romain
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Received on Thu Jan 30 20:15:03 2014
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