Bug#905774: jackd2: jackd no longer starts, since device is already in use; but who's using it?

[Klaumi Klingsporn]

Am / On Thu, 09 Aug 2018 12:35:28 +0200
schrieb / wrote "Francesco Poli (wintermute)"
<invernomuto at paranoici.org>:

> Why my jackd does not tell me which application is using
> hw:0 ?!? How can I figure out which application is
> getting in the way?

Maybe because jackd doesn't know about them? Top maybe the
tool of your choice!

> Please help me to investigate

Only two guesses: pulseaudio may block your device. Try 

pulseaudio -k

before starting jackd.

And than there's debian bug #901931 which gave me the same
problem last time: timidity-daemon 2.14.0-3 blocked the
sound-device (even for pulseaudio).

Klaumi

-----------
Klaus-Michael Klingsporn 
mail: klaumikli at gmx.de
web: www.klaumikli.de