I get the same error in /var/log/messages others have reported:

Jan 16 08:08:40 dave-desktop pulseaudio[2072]: alsa-mixer.c: Your kernel driver 
is broken: it reports a volume range from 18.00 dB to 18.00 dB which makes no 
sense.
Jan 16 08:08:43 dave-desktop pulseaudio[2072]: last message repeated 6 times


I use fluxbox and when my system starts up sound is not present. Sound does 
seem to work fine when I use gnome. In fluxbox, changing the levels using 
alsamixer doesn't fix the problem. However, if I run gnome-volume-control, the 
checkbox there indicates the sound is muted. I can then unmute it and then I 
can get sound and change levels with alsamixer. (There is no indication of the 
muted status of the system in alsamixer when I first run it.

Can't say whether this problem is related to the bug above, but I
thought I'd report it in case it is. (This new pulseaudio thing is still
a mystery to me.)

(Also, by the way, my system freezes seemingly randomly, but this is
probably an X problem and unrelated to audio.)

-- 
alsa-mixer.c: Your kernel driver is broken: it reports a volume range from 
18.00 dB to 18.00 dB which makes no sense
https://bugs.launchpad.net/bugs/410887
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