Hallo cjdshaw ,
1. Since you have not given any information about the BIOS version in your NUC, I'll will first update BIOS with the latest version 0055 if you didn't updated yet:
Download BIOS Update [SYSKLi35.86A]. Start with setting the BIOS to its default (enter BIOS by pressing F2, press F9 and than F10 for saving and exit BIOS settings).
2. Than You shall update your drivers manually, first by downloading from Intel site: Downloads for Intel® NUC Kit NUC6i5SYH and than executing manually the update.
3. The most imported in your case is the Chipset Driver (version 10.1.1.38, dated 10/31/2016), the Graphics Driver (version 22.214.171.12401, dated 8/31/2016) and than the Audio Driver (version 126.96.36.19910, dated 9/30/2016). You can also download and updated all the remaining drivers signed "latest".
Hope this will help
I have a similar configuration with an Onkyo receiver (TX-NR616), though I am running Windows 7 Ultimate (I use Windows Media Center with network-based TV Tuners). I have never seen this issue with audio muting.
Question: You mentioned that you do not shutdown the NUC. Do you allow it to sleep? I do not allow mine to sleep or to turn off the monitor...
Hope this helps,
I don't allow it to sleep, but it can shut down the monitor. I'll try disabling that.
I run the HDMI through a matrix so it sees more Hot Plug events that if it was connected directly to an amp. I ran this setup with my old nvidia ION based HTPC for years without this problem though.
I'm on BIOS 0054, but I'll try upgrading it. It's tough to get the drivers from the Intel site installed, since Windows automatically installs the newer WHQL ones
There is one thing more that you can try to change in BIOS settings:
4. Change the IDG Primary Video Port fro default AUTO to HDMI
5. Press F10 to save and exit.
Have you tried the latest graphics drivers?
There is one beta driver on the downloadcenter.intel.com that might help.
I worked my way through the solutions in this thread. Nothing helped until I tried the beta drivers. I've been running them for about 5 days now and so far, the audio device hasn't vanished. I'll update if I have any further problems. Thanks!
I'm afraid it happened again yesterday. I have found that it can be fixed by using Eventghost to put the monitor to sleep though. Presumably when it wakes up again, this triggers an HDMI hot-plug which recreates the audio device. It's not ideal though, since it's a bit fiddly for other users
Yes thanks, I tried that with no luck
You mentioned the sound worked for 5 days after loading the latest graphics driver the problem re appeared. I was wondering about HDMI cables. Did you test different cables?
Unfortunately some of the HDMI cabling runs behind walls so I can't switch everything out. The exact same setup worked for years with my nVidia ION based system though.