When I go to YaST Control Center | Sound I see two sound controllers listed:
0 - Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
1 - 8 Series/C220 Series Chipset High Definition Audio Controller

Driver for both reported as snd-hda-intel.

I cannot get sound from either. Neither will play a test sound. Both are enabled for PulseAudio.

Changing the default controller has no effect.

If I click on the setting icon in the system tray and choose Sound, there are no devices listed for sound output.

Everything I've found online related to this problem has had to do with missing packages or libraries. But everything suggested there does not apply in this case. I have all of those packages and libraries installed already.