I'm facing the same problem with my Latitude D810. I also attached my outputs.
** Attachment added: "Outputs of uname-a, lspci-vvnn, dpkg-s and alsa-info.sh" http://launchpadlibrarian.net/13555683/myOutputs.txt -- Dell Latitude D600: D/Port audio sounds terrible https://bugs.launchpad.net/bugs/201506 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