Try going into alsamixer, and making sure the speaker volume control is turned down completely. According to your mixer values, its muted, but at 100%. Try turning it down anyway, and see if that makes a difference.
-- System beeps very loud and annoying if when muted. https://bugs.launchpad.net/bugs/449940 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