[Debian-med-packaging] Bug#790120: praat: sound playback delay, random freeze after about 10-20 playbacks

[Jakob Wiedner]

Package: praat
Version: 5.4.0-1
Severity: important

Dear Maintainer,

when playing back a sound file (i tried wav and mp3) in the View/Edit window
there is a considerable delay of several seconds. After 2nd or 3rd time the
delay disappears and it works fine for several times. Rondomly after 10-20
times, praat freezes entirely and can just be closed by killing it.

Terminal output as follows:

FIRST PLAYBACK:
ALSA lib pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
SECOND PLAYBACK:
ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred

After that no more delays when playback immediately after.



-- System Information:
Debian Release: 8.1
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages praat depends on:
ii  libasound2           1.0.28-1
ii  libatk1.0-0          2.14.0-1
ii  libc6                2.19-18
ii  libcairo2            1.14.0-2.1
ii  libfontconfig1       2.11.0-6.3
ii  libfreetype6         2.5.2-3
ii  libgcc1              1:4.9.2-10
ii  libgdk-pixbuf2.0-0   2.31.1-2+b1
ii  libglib2.0-0         2.42.1-1
ii  libgtk2.0-0          2.24.25-3
ii  libpango-1.0-0       1.36.8-3
ii  libpangocairo-1.0-0  1.36.8-3
ii  libpangoft2-1.0-0    1.36.8-3
ii  libstdc++6           4.9.2-10
ii  oss-compat           6
ii  python               2.7.9-1

Versions of packages praat recommends:
ii  xfonts-100dpi             1:1.0.3
ii  xfonts-100dpi-transcoded  1:1.0.3
ii  xfonts-75dpi              1:1.0.3
ii  xfonts-75dpi-transcoded   1:1.0.3

praat suggests no packages.

-- no debconf information