It seems you have made some changes to the sound configuration, so can you please first try live booting:
http://releases.ubuntu.com/18.10/
and 19.04:
http://cdimages.ubuntu.com/daily-live/current/
then tell us if they have the same problem in a live session?
It seems you have made some changes to the sound configuration, so can you please first try live booting:
http:// releases. ubuntu. com/18. 10/
and 19.04:
http:// cdimages. ubuntu. com/daily- live/current/
then tell us if they have the same problem in a live session?