Comment 22 for bug 479296

I have a very similar problem. When watching video, everything is working fine for a while, but then the sound gets all choppy while the video freezes (mplayer). Fortunately, X doesn't freeze up and my machine doesn't reboot. I just have to close and re-start mplayer and wait for it to happen again. This happens every couple of minutes, but sometimes doesn't happen for about 10 minutes or so. I looked at /var/log/messages to see this:

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... snip ...
Nov 16 22:21:53 koala pulseaudio[1312]: ratelimit.c: 7 events suppressed
Nov 16 22:21:58 koala pulseaudio[1312]: ratelimit.c: 5515 events suppressed
Nov 16 22:22:03 koala pulseaudio[1312]: ratelimit.c: 3625 events suppressed
Nov 16 22:22:09 koala pulseaudio[1312]: ratelimit.c: 449 events suppressed
Nov 16 22:23:10 koala pulseaudio[1312]: ratelimit.c: 1467 events suppressed
Nov 16 22:23:15 koala pulseaudio[1312]: ratelimit.c: 5020 events suppressed
Nov 16 22:23:21 koala pulseaudio[1312]: ratelimit.c: 2735 events suppressed
Nov 16 22:23:26 koala pulseaudio[1312]: ratelimit.c: 3 events suppressed
Nov 16 22:25:24 koala pulseaudio[1312]: ratelimit.c: 2262 events suppressed
Nov 16 22:25:30 koala pulseaudio[1312]: ratelimit.c: 5261 events suppressed
Nov 16 22:25:35 koala pulseaudio[1312]: ratelimit.c: 4069 events suppressed
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There are *many* more, but I don't think posting more will be more helpful.

I'm using the Open Source ATI driver specified in xorg.conf as "ati" with a "ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]" (as reported by lspci) graphics card, so linking it to the proprietary nvidia driver doesn't seem to be correct.

Any info I can provide to make this report more useful? I have not tried installing "linux-backports-modules-alsa-karmic-generic" since a user above said it didn't make a difference.

Thanks.