Okay , i have almost the same hardware, and it is here running.
Open synaptic and search for task-remove-pulseaudio, install it. It will remove all package, and configuration files.
Now install task-pulseaudio, after it is installed, open pcc, and enable pulseaudio. Reboot, install pavucontrol.
You will pavucontrol find in audio section, what is now happens?