No Audio HDMI device from on-board Intel Graphics HD 530?

[dark_77]

Hi, Windows 10,

I have NVIDIA GTX 970 as a dedicated graphics card, and Intel HD Graphics 530 on my motherboard. In BIOS I have enabled multi-monitor support so that my TV is connected to motherboard HDMI socket, NOT the graphics card (this is in order to get the BIOS screen on my PC monitor, NOT my TV).

Everything worked fine until a couple of days ago. Not sure what happenned, but under sound devices, I no longer see the HDMI audio from onboard graphics (Intel HD 530). The graphics adapter itself works fine, it is visible in Device manager, and when I switch TV on the HDMI input from PC, there is a "new hardware plugged in" Windows chime, and the TV gets the picture fine, but there is no way to get audio from the PC to TV any more. Up until few days ago, I just used to open "Sound" panel, and select the audio device from Intel graphics as a default device, and the sound would immediately go through the PC, but this is no longer there?

Here is the screenshot of Device Manager and Sounds Panel:

I tried:

1. Disable/Enable device
2. Installed old drivers
3. Installed latest drivers (20.19.15.4300)
4. Tried "Add legacy hardware" through device manager
5. Installed Intel Driver Update Utility, scanned with it, nothing
6. I looked through "Intel HD Graphics Control Panel", no mention of any audio codec / drivers

I downloaded drivers from here

https://downloadcenter.intel.com/download/25484/Intel-Graphics-Driver-for-Windows-7-8-1-10-15-40-

The infuriating thing is that from downloaded Intel drivers I can see the files that are audio drivers, they are

Intel\DisplayAudio\8.20\intcdaud.cat
Intel\DisplayAudio\8.20\IntcDAud.inf
Intel\DisplayAudio\8.20\IntcDAud.sys
Intel\DisplayAudio\8.20\version.ini

But there's no way for the system to actually SEE the device so that I can point it to these drivers?


Thanks for any tips

 

[dark_77]

Update: just tonight when I first switched my PC on, I have actually seen the Intel Audio device as available! I was hoping the problem sorted itself out, so I didn't take a screenshot, however during the PC usage, the screen started flickering when I had the Device Manager on, so I rebooted the computer, but ever since then it was also missing!



Needless to say, I had downloaded and installed and removed various versions of Intel drivers, but no luck. Every single driver actually says that it will now install two drivers - one for graphics, one for audio, but after it finishes, the audio device is nowhere to be found! Countless reboots later, the problem is still there 🙁