root@N900# stop pulseaudio

May 19 10:54:30 N900 pulseaudio[26139]: flist.c: flist is full (don't worry)
May 19 10:54:30 N900 last message repeated 115 times
May 19 10:54:30 N900 pulseaudio[26139]: module-alsa-sink-volume.c: This in not my sink, what to do?
May 19 10:54:30 N900 pulseaudio[26139]: flist.c: flist is full (don't worry)
May 19 10:54:30 N900 pulseaudio[26139]: voice-hw-sink-input.c: Master sink "sink.hw0" not found
May 19 10:54:30 N900 pulseaudio[26139]: flist.c: flist is full (don't worry)
May 19 10:54:30 N900 last message repeated 115 times
May 19 10:54:30 N900 pulseaudio[26139]: voice-hw-source-output.c: Master source "source.hw0" not found
May 19 10:54:30 N900 pulseaudio[26139]: flist.c: flist is full (don't worry)
May 19 10:54:30 N900 last message repeated 50 times
May 19 10:54:30 N900 pulseaudio[26139]: voice-cmtspeech.c: closing the modem instance
May 19 10:54:30 N900 pulseaudio[26139]: voice-util.h: voice_memchunk_pool empty, all 128 slots allocated
May 19 10:54:30 N900 pulseaudio[26139]: flist.c: flist is full (don't worry)
May 19 10:54:30 N900 last message repeated 12 times
May 19 10:54:30 N900 mafw-dbus-wrapper[1554]: GLIB WARNING ** mafw-gst-renderer-worker-volume - got disconnected from pulse, reconnecting
May 19 10:54:30 N900 pulseaudio[26139]: flist.c: flist is full (don't worry)
May 19 10:54:30 N900 last message repeated 76 times
May 19 10:54:30 N900 pulseaudio[26139]: memblock.c: Memory pool destroyed but not all memory blocks freed! 1 remain.
May 19 10:54:30 N900 init: pulseaudio main process (26139) terminated with status 1


root@N900# start pulseaudio
May 19 10:56:31 N900 pulseaudio[26703]: main.c: Running in system mode, but --disallow-exit not set!
May 19 10:56:31 N900 pulseaudio[26703]: main.c: Running in system mode, but --disallow-module-loading not set!
May 19 10:56:31 N900 pulseaudio[26703]: module-combine.c: No slave sinks specified.

roo@N900# ps aux|grep pulse
pulse 26703 1.4 1.8 89584 4408 ? S<sl 10:56 0:00 /usr/bin/pulseaudio --system --high-priority --log-target=syslog

EDIT:
@pali
If you need further tests that could help to solve feel free to ask.