I confirm the issue. Here was a problem with the PCM volume. I solved with the 
following steps:

- pulseaudio -k
- sudo mv /etc/asound.conf /etc/asound.conf.temp
- sudo alsamixer
- Correct the PCM level
- sudo alsactl store
- sudo mv /etc/asound.conf.temp /etc/asound.conf
- sudo /etc/init.d/alsa-base restart
- pulseaudio -D

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noise at login, mixer setting problem?
https://bugs.launchpad.net/bugs/199883
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