You have Auto-Mute enabled, which mutes the speaker when headphone is plugged. Try turning it off with following command and see if it behaves as you want.
amixer -c1 sset "Auto-Mute Mode" Disabled -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2160421 Title: switch audio output To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2160421/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
