Bug#633815: jackd2: High CPU usage following sleep (top reports 190% on quad-core)

[Joel Roth]

Package: jackd2
Version: 1.9.6~dfsg.1-2
Severity: normal

Observed when running jackd with user privileges.

System is extremely sluggish until I kill jackd.


-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.36.20101128 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)
Shell: /bin/sh linked to /bin/dash

Versions of packages jackd2 depends on:
ii  coreutils                 8.5-1          GNU core utilities
ii  debconf [debconf-2.0]     1.5.38         Debian configuration management sy
ii  libasound2                1.0.23-2.1     shared library for ALSA applicatio
ii  libc6                     2.11.2-11      Embedded GNU C Library: Shared lib
ii  libcelt0-0                0.7.1-1        The CELT codec runtime library
ii  libdbus-1-3               1.4.6-1        simple interprocess messaging syst
ii  libexpat1                 2.0.1-7        XML parsing C library - runtime li
ii  libgcc1                   1:4.4.4-17     GCC support library
ii  libjack-jackd2-0          1.9.6~dfsg.1-2 JACK Audio Connection Kit (librari
ii  libncurses5               5.7+20100313-5 shared libraries for terminal hand
ii  libreadline6              6.1-3          GNU readline and history libraries
ii  libsamplerate0            0.1.7-3        Audio sample rate conversion libra
ii  libsndfile1               1.0.23-1       Library for reading/writing audio 
ii  libstdc++6                4.6.0-10       The GNU Standard C++ Library v3
ii  python-dbus               0.83.1-1       simple interprocess messaging syst

Versions of packages jackd2 recommends:
ii  jackd2-firewire           1.9.6~dfsg.1-2 JACK Audio Connection Kit (FFADO a
ii  libpam-modules            1.1.2-2        Pluggable Authentication Modules f
ii  qjackctl                  0.3.6-1+b1     User interface for controlling the

Versions of packages jackd2 suggests:
ii  jack-tools                    0.0.2-7+b1 various JACK tools: plumbing, play
ii  meterbridge                   0.9.2-8+b1 A collection of Audio meters for t

-- debconf information:
* jackd/tweak_rt_limits: true