Bug#601008: jackd2: jackd gets stuck in infinite loop after laptop suspend/resume

[Lars Luthman]

Package: jackd2
Version: 1.9.5~dfsg-19
Severity: normal


jackd starts and runs fine on my laptop, but after a suspend/resume
cycle jackd sometimes gets stuck in an infinite loop, using 100% of
one of the CPU cores. I would expect a couple of xruns or other audio
glitches, but not this type of complete lockup.

Steps to reproduce:

1. Run 'jackd -P70 -dalsa -p256 -n2 -r48000 -P'
2. Suspend the computer to RAM
3. Wake the computer back up

The output looks like this:


[ll at innsmouth ~]$ jackd -P70 -d alsa -p256 -n2 -r48000 -P
jackdmp 1.9.6
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2010 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 70
audio_reservation_init
Acquire audio card Audio0
creating alsa driver ... hw:0|-|256|2|48000|0|0|nomon|swmeter|-|32bit
Using ALSA driver HDA-Intel running on card 0 - HDA Intel at
0xf4300000 irq 22
configuring for 48000Hz, period = 256 frames (5.3 ms), buffer = 2
periods
ALSA: final selected sample format for playback: 32bit integer
little-endian
ALSA: use 2 periods for playback

<-- This is where I suspend and resume -->

ALSA: channel flush for playback failed (File descriptor in bad state)
JackAudioDriver::ProcessAsync: read error, skip cycle
alsa_driver_xrun_recovery
ALSA: channel flush for playback failed (File descriptor in bad state)
JackAudioDriver::ProcessAsync: read error, skip cycle

<-- This is repeated, with the lines sometimes coming in different
orders and the alsa_driver_xrun_recovery line more common than others,
until I kill jackd -->

jack main caught signal 15
alsa_driver_xrun_recovery
ALSA: channel flush for playback failed (File descriptor in bad state)
JackAudioDriver::ProcessAsync: read error, skip cycle
alsa_driver_xrun_recovery
ALSA: channel flush for playback failed (File descriptor in bad state)
JackAudioDriver::ProcessAsync: read error, skip cycle
ALSA: channel flush for playback failed (File descriptor in bad state)
Cannot stop driver
Released audio card Audio0
audio_reservation_finish
WARNING: 21760843 message buffer overruns!
[ll at innsmouth ~]$


-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (900, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.31.12-rt21-1-amd64 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages jackd2 depends on:
ii  coreutils                 8.5-1          GNU core utilities
ii  debconf [debconf-2.0]     1.5.36         Debian configuration management sy
ii  libasound2                1.0.23-2       shared library for ALSA applicatio
ii  libc6                     2.11.2-6       Embedded GNU C Library: Shared lib
ii  libcelt0-0                0.7.1-1        The CELT codec runtime library
ii  libdbus-1-3               1.2.24-3       simple interprocess messaging syst
ii  libexpat1                 2.0.1-7        XML parsing C library - runtime li
ii  libgcc1                   1:4.4.5-4      GCC support library
ii  libjack-jackd2-0          1.9.5~dfsg-19  JACK Audio Connection Kit (librari
ii  libncurses5               5.7+20100313-4 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               1.0.21-3       Library for reading/writing audio 
ii  libstdc++6                4.4.5-4        The GNU Standard C++ Library v3
ii  python                    2.6.6-3        interactive high-level object-orie

Versions of packages jackd2 recommends:
ii  jackd2-firewire            1.9.5~dfsg-19 JACK Audio Connection Kit (FFADO a
ii  libpam-modules             1.1.1-6       Pluggable Authentication Modules f
ii  qjackctl                   0.3.6-1+b1    User interface for controlling the

Versions of packages jackd2 suggests:
pn  jack-tools                    <none>     (no description available)
pn  libjackasyn0                  <none>     (no description available)
pn  meterbridge                   <none>     (no description available)

-- Configuration Files:
/etc/security/limits.d/audio.conf changed [not included]

-- debconf information:
* jackd/tweak_rt_limits: true