You could temporarily remove the module-switch-on-connect from the /etc/pulse/default.pa, reboot and redo the test.
To check if switch-on-connect is loaded or not, run "pactl list modules | grep connect" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1873104 Title: Defaults to USB audio after every reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1873104/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs