At this point, my sound is frequently totally broken.  I just found
PulseAudio spinning my CPU like crazy:

m...@zest:~/tmp/gnumeric-1.9.9/src$ ps -eaf|grep pulseaudio
mbt       4564     1 57 Sep11 ?        1-13:21:20 /usr/bin/pulseaudio --start 
--log-target=syslog
mbt       4568  4564  0 Sep11 ?        00:00:00 
/usr/lib/pulseaudio/pulse/gconf-helper

I attempted to "pulseaudio -k", which had no effect.  Sending signal 15
had no effect.  Sending signal 9 killed it finally, but when it came
back up, it's only option for "output" is a null audio device.

-- 
5.1 on SB Live! 5.1 [SB0060] is very unreliable
https://bugs.launchpad.net/bugs/406582
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