Sound issues: Ubuntu MATE 16.04 on Lenovo R61i Laptop


As of the last update I have lost ALL sound on my Lenovo R61i when booting Ubuntu MATE 16.04
I booted Linux Mint to see if there were a hardware problem, and was able to listen to a youtube video, but I get no sound now when booting MATE.


Do level meters show if audio playing ok in Pulseaudio even if not hearing any sound?