30 Jan
2014
30 Jan
'14
6:56 p.m.
On Thu, Jan 30, 2014 at 12:05 AM, Clemens Ladisch <clemens(a)ladisch.de>wrote;wrote:
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
Romain Michon wrote:
Yep...
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.
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.