On further testing I found this workaround. Goto System->Preferences->Output Tab->Set Connector from Analog Output to Analog Headphones; has to be set back everytime you want to listen to output from the speakers.
As far as I can tell Ubuntu just forgets to turn off the speaker output when it turns on the headphone output when it detects the headphone jack is plugged in. -- Laptop speaker plays sound even when headphones are plugged in https://bugs.launchpad.net/bugs/459643 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