No sound on chrome (Only) after using an HDMI cable

I had the same problem. When I changed sound output device to HDMI, I did it in PulseAudio Volume Control. This made the sound in Chrome disappear. To fix it:

1. Open PulseAudio Volume Control (open a terminal and type pavucontrol)
2. Go to the Configuration tab and identify the drop-down list that contains HDMI outputs. Set that profile to Off.
3. Select profile for the drop-down list that contains your normal sound output (e.g. Analog Stereo Output).