I fixed it after reading the alsa troubleshooting pages. The problem was the digital/analog switch. I had to get the digital output turned off and use analog. I do not know how or why installing Kubuntu switched on the digital output, because I did not alter it myself.
-- no sound after Kubuntu/Ubuntu switching https://launchpad.net/bugs/77988 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
