I can confirm this problem on my laptop.
In /var/lib/alsa/asound.state it looks like the mixers should be turned up.
Also the following works:
sudo /etc/init.d/alsa-utils stop
alsamixer -c0
#changing some levels
sudo /etc/init.d/alsa-utils start
#everything is reset again to the level before stop like it is to be expected.
alsa-utils 1.0.18-1ubuntu6
alsa-base 1.0.18.dfsg-1ubuntu2
cat /proc/asound/cards
0 [ICH6 ]: ICH4 - Intel ICH6
Intel ICH6 with AD1981B at irq 22
00:1e.2 Multimedia audio controller: Intel Corporation
82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03)
** Changed in: alsa-utils (Ubuntu)
Status: New => Confirmed
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[Jaunty] Sound channels are muted after reboot
https://bugs.launchpad.net/bugs/316430
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