May 2020 update broke my audio on HDMI external LG TV

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DavideAgu

- Windows 10 Education 20H2 19042.630
- HP OMEN Notebook PC 15-5003nl
- Intel HD Graphics: 20.19.15.5166
- Intel Audio Display Drivers: (26/04/2018) 6.16.0.3208 IntcDAud.sys
- Realtek (16/06/2020) 6.0.8971.1 RTKVHD64.sys
- NVIDIA Virtual Audio Device (Wave Extensible) (WDM) 14/03/2019 4.13.0.0 nvvad64v.sys
Hi! Before May2020 update I used my external TV LG 19LE3308 for video/audio without any problem va HDMI.
After the Update, I don't see the second screen as TV LG but now is "Intel Audio(R) Display Drivers - HDMI 1" and the audio doesn't work 99% of the time. I can't say 100% because at the startup, the audio works sometimes for some minutes, then it stops with a fuzzy sound from the LG speaker.
I see volume indicator changing on playback during audio play without sounds from the speaker.

The LG works perfectly with Linux and I tried without HDMI too (antenna only) (not a TV issue).
I also tried a Samsung TV but I have the same issue. I tried changing the HDMI cord without success.

I opened a thread on Intel's forum. After checking my log, they made me install HP reccomended drivers from HP support webpage (20.19.15.5058) after uninstalling completely old drivers until I got 'Microsoft Basic Display Adapter' on Device manager.
Same bugged behavior.
I also upgraded LG TV firmware to 3.03.43 but the bug persists.

I tried old Intel HD graphic drivers (15.40.42.5063) without success.

Unfortunately I need to work with this laptop and at the moment restoring everything is not an feaseable option.


Similar issues to mine found on reddit:
https://www.reddit.com/r/Windows10/comments/gbtqky View: https://www.reddit.com/r/Windows10/comments/gbtqky/windows_10_pc_cant_hear_audio_from_hdmi_connected/

https://www.reddit.com/r/Windows10/comments/gblug9 View: https://www.reddit.com/r/Windows10/comments/gblug9/windows_randomly_stops_recognizing_my_tv_second/


How can I fix it or debug it?

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