Comment 1 for bug 575598

I have the same issue, have had it for the last 3 releases. 4 releases back I could fix it editing /etc/modprobe.d/alsa-base.conf and adding some options, but that stopped working.

I have nearly the same laptop, mine is a Satellite U405-S2856. My commands output the same as yours, please run these as well:

lspci -vv
lshw
aplay -l
cat /proc/asound/card0/codec#* | grep Codec

and verify that your output matches mine.

There's another guy having the same issue, check it out: http://ubuntuforums.org/showthread.php?t=1150499