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 ** Attachment added: "lspci-vv" http://launchpadlibrarian.net/48187018/lspci-vv -- Microphone Issue [No signal from internal and external microphones], microphones not detected. https://bugs.launchpad.net/bugs/575598 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs