Dell Precision 5750 - No sound ( Dummy Output )

@dpet8 Wow. Now you are talking Good News!
I have had a long running battle with intermittent sound on Zorin as my friend @Aravisian will be very familiar. In short, every time I booted Zorin, it was a lottery if sound worked or not. A few days ago I got the silent treatment from Zorin. My usual remedies via pulse audio and alsamixer controls failed me. Then I found setting on alsamixer for "Loopback" at far right. I had a play with that and sound came back, initially as deafening feedback tone. After I turned down nearby sliders, that receded and sound still worked. I saved the alsamixer setting using:

sudo alsactl store

Sound still works (so far anyhow) after many a reboot and even after a kernel update today, things that would regularly stop it before. Maybe I have said this before, but sound on Zorin(Ubuntu) seems more witchcraft than science. I continue the habit of crossing fingers every boot and testing speakers thereafter.

I hope you now get your speakers, headphones and microphones all working as expected.

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