Comment 82 for bug 1801540

Same issue on ASRock B450 Gaming-ITX/ac

No amount of pulseaudio fiddling fixes it. Going to try a usb adapter soon.

http://alsa-project.org/db/?f=32e943a4728b3d94fb771ac9db53accfe6ac1f17

OS: Ubuntu 18.04.2 LTS x86_64
Kernel: 4.18.0-16-generic
Uptime: 2 hours, 25 mins
Packages: 2148
Shell: bash 4.4.19
Resolution: 1920x1200, 1920x1200
DE: GNOME 3.28.3
WM: GNOME Shell
WM Theme: Adwaita
Theme: Ambiance [GTK2/3]
Icons: Ubuntu-mono-dark [GTK2/3]
Terminal: gnome-terminal
CPU: AMD Ryzen 5 2600X (12) @ 3.600GHz