If I plug my external monitor through HDMI, I lose audio in my laptop. My external monitor doesn't have audio, so I want to keep the audio in the laptop's speakers. How can I do that?
Ubuntu – No audio when plugging external monitor through HDMI
Go to the sound menu at the top of the screen and click preferences. Alternatively, execute the command alsa-mixer. Under the output tab, see if there is an option in the dropdown for HDMI Output.