Comment 88 for bug 1544477

@John, @Anupam: could you try to follow steps described by Alfonso in comment #82? I would also try to enable pulseaudio logging.

How to enable pulseaudio logging (looks like wiki instructions don't work for Ubuntu Touch, IIRC these are the right steps):
- set device to writable mode
As root:
- create backup file: cp /usr/share/upstart/sessions/pulseaudio.conf /usr/share/upstart/sessions/pulseaudio.conf.bkp
- edit in file /usr/share/upstart/sessions/pulseaudio.conf
  line:
      exec pulseaudio --start
  to:
      exec pulseaudio -vvvv --start --log-target=newfile:/tmp/pulseverbose.log --log-time=1
- restart device

Please do not restart your phone after you reproduce the issue or log files will be lost (copy them in another directory first so you can upload them later)

(from wiki) The log files are in the /tmp directory. You might see more than one file (pulseverbose.log, pulseverbose.log.1, pulseverbose.log.2, etc). In case you don't know which file is the right one, please attach all files to the launchpad bug.