do you have anything on the command line when trying to change the device? Do you have a .asoundrc.asoundconf to your user directory? What does it contain?
Could you try to run "asoundconf list" and copy that to a comment? Then the same with "asoundconf set-default-card CARD" where CARD is the name of the card displayed by the previous comment. Does it make any difference for the .asoundrc.asoundconf? -- Unable to change default sound device. https://launchpad.net/bugs/61278 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
