Hey, all. New install of 18.04. I have an older 18.04 that works great from an Intel NUC on the same system. But I've plugged in the new system (a Dell E7250), and while the video is terrific -- 4K and everything -- not so much the audio. This is a Sharp 43" 4K set, if that matters. Any suggestions on where to look/what to poke? Thanks! -Ken