Comment 3 for bug 256190

Running the script manually gives:

perseus:[~] /usr/share/hwtest/scripts/audio_playback /usr/share/hwtest/data/audio_playback.wav

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element my_pipeline, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

(audio_playback:5933): GStreamer-CRITICAL **: Failed to deactivate pad typefind:src, very bad

(audio_playback:5933): GStreamer-CRITICAL **: Failed to deactivate pad wavparse0:sink, very bad

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element wavparse0, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element typefind, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element decode, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element source, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element convert, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

(audio_playback:5933): GStreamer-CRITICAL **:
Trying to dispose element sink, but it is not in the NULL state.
You need to explicitly set elements to the NULL state before
dropping the final reference, to allow them to clean up.

GThread-ERROR **: file /build/buildd/glib2.0-2.17.7/gthread/gthread-posix.c: line 171 (g_mutex_free_posix_impl): error 'Device or resource busy' during 'pthread_mutex_destroy ((pthread_mutex_t *) mutex)'
aborting...
zsh: trace trap (core dumped) /usr/share/hwtest/scripts/audio_playback