Hang when shutting down on raspberry pi

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Hello,

I'm new to the list (and pjsip) so please bear with me.

I'm having an issue with pjsip (running via the python wrapper) hanging
when shutting down when run on a raspberry pi. I'm using the 2.1 release
and the raspberry pi is running debian7.1 / alsa / pulseaudio with a usb
sound audio device (set as default audio device). pjsip was compiled from
source with default configuration.

The same code is behaving better on my laptop (ubuntu 12.10 / alsa / pulse
audio / embedded sound card), but periodically prints the following
messages (although still seems to work):

Expression 'SetApproximateSampleRate( pcm, hwParams, sr )' failed in
'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1294
Expression 'PaAlsaStreamComponent_InitialConfigure( &self->capture,
inParams, self->primeBuffers, hwParamsCapture, &realSr )' failed in
'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1870
Expression 'PaAlsaStream_Configure( stream, inputParameters,
outputParameters, sampleRate, framesPerBuffer, &inputLatency,
&outputLatency, &hostBufferSizeMode )' failed in
'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1994

Can anyone offer any words of wisdom getting this to reliably work on
raspberry pi / arm device?

I'd be happy to post the python source code if that would be useful to see.

-Matt
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