[LAU] USB audio interface and a buggy USB controller

Clemens Ladisch clemens at ladisch.de
Tue Sep 7 06:50:23 UTC 2010

Joan Quintana wrote:
> It seems that my new laptop has a buggy USB controller (lspci says
> 'Intel Corporation 5 Series/3400 Series Chipset USB2') and this causes
> JACK to fail in 'duplex mode' and 'only recording mode'
> $ /usr/bin/jackd -dalsa -dhw:2 -r44100 -p1024 -n2
> ...
> ALSA: could not start playback (Broken pipe)
> DRIVER NT: could not start driver
> ...
> I have an Edirol UA-25EX.
> I read about this problem in:
> *http://ubuntuforums.org/showthread.php?p=9812317
> where points to
> *http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-June/070365.html

If you had this buggy controller, the sound output would be silent or
garbled, but the driver wouldn't be able to detect this.

Your error messages show that there is some other problem.

Is there some error message in the system log when this happens?


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