I ran pulseaudio in console mode, and received these errors:
$ pulseaudio
E: alsa-sink.c: ALSA woke us up to write new data to the device, but there was
actually nothing to write!
E: alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'.
Please report this issue to the ALSA
** Attachment added: AlsaDevices.txt
http://launchpadlibrarian.net/26917283/AlsaDevices.txt
** Attachment added: ArecordDevices.txt
http://launchpadlibrarian.net/26917284/ArecordDevices.txt
** Attachment added: BootDmesg.txt
http://launchpadlibrarian.net/26917285/BootDmesg.txt
**