Comment 12 for bug 871633

Pavel's workaround works, somewhat. I can now select "Analog Output" from the menu and only the headphones work. However switching back does not work, i.e. the speakers remain silent and the headphones continue.

I think this bug is related to the new jack sensing ability that is now present in Oneiric. I think it does not sense (or ignore) when headphones are plugged in.

Natty worked fine because it had the drop-down by default.