When I connect a hdmi device, laptop sometimes doesn’t transmit audio to the hdmi device. When that happens, the hdmi audio device does not show up in Playback devices either, even when I have enabled showing disconnected or disabled devices. The issue is occasional and happens only sometimes, while other times audio just works fine. Whenever audio doesn’t work on hdmi, rebooting resolves the issue. I have tried upgrading all the drivers using Dell utility, but problem still persists.
I didn’t find the right solution from the Internet