it is the graphic driver which send request to your hdmi tv/monitor to
get EDID, it extract info from EDID to ELD and pass ELD to audio driver

are you connect your TV  to display port , hdmi or DVI connector ?

The file is located in /proc/asound/cardX/eld#Y.0 (where X is the card
number, and Y is the device number starting from 0. So if aplay -l shows
Card 0, device 3 as being the first device listed you need to check
/proc/asound/card0/eld#0.0).

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https://bugs.launchpad.net/bugs/1264665

Title:
  [W65_67SZ, Intel Haswell HDMI, Digital Out, HDMI] Playback problem,
  pavucontrol shows hdmi signal but no sound on tv

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