I got this problem with my laptop and TV. When I plug in my HDMI, all visuals appear. But no sound. For the sound to work, I need to restart my PC, log off will not work. When I look in playback devices, there is only my laptop speakers. I have enabled "show disabled devices" and "show disconnected devices" in playback devices.
I have updated all my graphic and sound drivers with the use of device manager.
Tl;dr HDMI does not appear in playback devices, without restart of PC.
I have updated all my graphic and sound drivers with the use of device manager.
Tl;dr HDMI does not appear in playback devices, without restart of PC.