Please try daily kernel at . I think this commit is to solve the issue. The fix is not in mainline yet.
commit 5a222e8494524d04cc8de63726644759e5b132f7 Author: Andrew Chant <ach...@google.com> Date: Fri Mar 23 19:25:23 2018 -0700 ALSA: usb-audio: UAC2 jack detection  http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1749207 Title: kernel is reporting Nintendo USB microphone as an output device To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1749207/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs