Comment 11 for bug 433654

And here's the log on an up-to-date Karmic install, same HW, but French locale, but the meaning is the same as above:
Oct 18 12:43:33 desktop bonobo-activation-server (t3g-32235): could not associate with desktop session: Failed to connect to socket /tmp/dbus-bvz4h7STED: Connexion refusée
Oct 18 12:43:38 desktop pulseaudio[32370]: pid.c: Stale PID file, overwriting.
Oct 18 22:51:19 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:51:19 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:51:19 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:52:14 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:52:14 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:52:40 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:52:40 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:01 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:01 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:07 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:16 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:55 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:55 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:59 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:53:59 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:54:10 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:54:10 desktop pulseaudio[3463]: alsa-sink.c: Error opening PCM device front:0: Périphérique ou ressource occupé
Oct 18 22:58:29 desktop pulseaudio[16510]: alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write!
Oct 18 22:58:29 desktop pulseaudio[16510]: alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
Oct 18 22:58:29 desktop pulseaudio[16510]: alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.
Oct 18 23:09:46 desktop pulseaudio[3463]: ratelimit.c: 1329 events suppressed
Oct 18 23:09:52 desktop pulseaudio[3463]: ratelimit.c: 1 events suppressed
Oct 18 23:36:45 desktop pulseaudio[3463]: ratelimit.c: 31 events suppressed
Oct 18 23:37:06 desktop pulseaudio[3463]: ratelimit.c: 34 events suppressed
Oct 18 23:46:52 desktop pulseaudio[3463]: ratelimit.c: 31 events suppressed
Oct 18 23:56:56 desktop pulseaudio[3463]: ratelimit.c: 32 events suppressed
Oct 19 00:59:22 desktop pulseaudio[3463]: alsa-sink.c: ALSA nous a réveillé pour lire de nouvelles données à partir du périphérique, mais il n'y avait en fait rien à écrire !
Oct 19 00:59:22 desktop pulseaudio[3463]: alsa-sink.c: Il s'agit très probablement d'un bogue dans le pilote ALSA « snd_hda_intel ». Veuillez rapporter ce problème aux développeurs d'ALSA.Nous avons été réveillés avec le jeu POLLOUT -- cependant un snd_pcm_avail() ultérieur a retourné 0 ou une autre valeur < min_avail.
Oct 19 02:12:06 desktop pulseaudio[2431]: ratelimit.c: 237 events suppressed
Oct 19 02:15:40 desktop pulseaudio[3294]: alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write!
Oct 19 02:15:40 desktop pulseaudio[3294]: alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
Oct 19 02:15:40 desktop pulseaudio[3294]: alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

I should have posted this info earlier, but Daniel post was an answer to Tony, and I didn't pick it up when reading it in my mail reader, sorry.