Problem on VMware Horizon getting my computer’s built-in microphone to work when I plug in headphones

For me, the microphone worked when I plugged in the headphones BEFORE starting VMware Horizon.  When I plugged in the headphones AFTER starting Horizon the microphone did not work.

When I plug in these headphones without running Horizon my host OS, an Ubuntu variant, prompts me to choose whether it is a pair of headphones only or if it is a headset with a microphone attached.ย  I’m guessing that it’s possible that when I plug in the headphones after starting Horizon my host OS decides it’s a headset with a built-in mic and then Horizon tries to use a mic from the headphones, ignoring my computer’s built-in mic.ย  Just a guess!ย  ๐Ÿ™‚