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[clepsdyrae <myopenid@xxxxxxxxxxxxxxx>]

Public bug reported:

I have jackdbus running successfully (via qjackctl) in Kubuntu 16.10
with a Scarlett 18i8 USB interface.

If I turn the interface off, jackdbus will usually (not always -- I
think I may need to have played audio at least once?) jump to 100% CPU
usage (of a single core) and stay there indefinitely.

I can kill the jack processes, turn the interface back on, and restart
the processes, and things are fine again.

When the CPU usage happens, I see so further output in
.log/jack/jackdbus.log

Judging by jackdbus.log, I think I have "Controller" version 1.9.11:

Tue Dec 27 01:52:41 2016: Controller activated. Version 1.9.11 (unknown)
built on Sat Sep 17 05:04:38 2016

** Affects: jackd2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1652753

Title:
  jackdbus takes 100% of a core when interface is turned off

Status in jackd2 package in Ubuntu:
  New

Bug description:
  I have jackdbus running successfully (via qjackctl) in Kubuntu 16.10
  with a Scarlett 18i8 USB interface.

  If I turn the interface off, jackdbus will usually (not always -- I
  think I may need to have played audio at least once?) jump to 100% CPU
  usage (of a single core) and stay there indefinitely.

  I can kill the jack processes, turn the interface back on, and restart
  the processes, and things are fine again.

  When the CPU usage happens, I see so further output in
  .log/jack/jackdbus.log

  Judging by jackdbus.log, I think I have "Controller" version 1.9.11:

  Tue Dec 27 01:52:41 2016: Controller activated. Version 1.9.11
  (unknown) built on Sat Sep 17 05:04:38 2016

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