Sound wont work on ubuntu?

Solution
Can you post output of "sudo aplay -L" You can test the sound with alsa directly with program speaker-test:
http://alsa.opensrc.org/Speaker-test
probably it is included by default on ubuntu.

I have two AMD cards running sound through hdmi (ubuntu 15.10, archlinux and OpenELEC) with the default opensource drivers with DTS/AC3 pass through as well as 2.0 PCM sound to TV no problem.

spankmon

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How are the speakers connected... hdmi, line out, usb?

I haven't used regular Ubuntu, but in other versions the drill is to open sound settings and turn-off all devices except the one you are using. Turn them off, don't set them as fallback.
 

Lee-m

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I just saved my files, and trashed the install. I don't think there is a reliable/easy method to downgrade.

But maybe some one else will give you better advice. All I can tell you is what happened when I got this issue.