Re: [LAU] ESI Romio II and alsa-midi-latency-test failure

On 2014-01-26 14:56 +0100, Clemens Ladisch wrote:
> Andre Majorel wrote:
> > I'm trying to use midi-alsa-latency-test 0.0.3
> > with an ESI Romio II USB - MIDI interface
> > and it's not working reliably.
> >
> > No, it's not a bad connection. Running alsa-midi-latency-test
> > between one output (or input) of the Romio II and one input (or
> > output) of another MIDI interface works reliably. What doesn't
> > work is loopback between the Romio II and itself.
>
> What happens if you try two loopbacks at the same time, from the
> Romio to another device, and from another device to the Romio?

Tried three combinations of one alsa-midi-latency-test process
writing to one Romio II port and another reading from another
Romio II port :

  alsa-midi-latency-test -o 24:0 -i 28:7 &
  alsa-midi-latency-test -o 28:7 -i 24:0

  alsa-midi-latency-test -o 24:0 -i 28:7 &
  alsa-midi-latency-test -o 28:7 -i 24:1

  alsa-midi-latency-test -o 24:1 -i 28:7 &
  alsa-midi-latency-test -o 28:7 -i 24:1

They all worked without a hitch.

Tried the Romio II with itself again : it failed as before.

Found a large number of "usb_submit_urb: -22" messages in
kern.log for yesterday (but none for today).

-- 
André Majorel http://www.teaser.fr/~amajorel/
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