NUC7i5BNH latest bios 0076, HDMI Firmware Update Tool 0.72 installed, latest graphics driver installed GFX_WIN10_64_22.214.171.12486_BN, Windows 10 1809 fully patched.
Intel Display Audio shown as working properly in Device Manager, selected as default device in Control Panel, but no sound output when Test button hit.
When Intel Display Audio driver version 10.22.1.100 (packaged with graphics driver GFX_WIN10_64_126.96.36.19978) is installed HDMI audio plays perfectly well.
I have been unable to find one graphics driver update since GFX_WIN10_64_188.8.131.5278 that has trouble free HDMI audio with my setup. Why does Display Audio driver version 10.22.1.100 work perfectly well while later Audio driver versions do not?
Ensure that before updating the Graphic Driver (para. 1 - 7 above), you should have installed the Chipset Driver https://downloadcenter.intel.com/download/26801/Intel-Chipset-Device-Software-for-Intel-NUC-Kit-NUC7... and the Management Engine Driver https://downloadcenter.intel.com/download/28215/Intel-Management-Engine-Consumer-Driver-for-Windows-...
Thanks for the response.
I have followed these procedures since I acquired this NUC and stayed with bios version 46 and graphics driver 4678 for some time because that was the only driver that maintained stable display audio. After updating bios, I am able to install latest graphics drivers (currently GFX_WIN10_64_184.108.40.20686_BN) but have to manually install display audio driver version 10.22.1.100 (packaged with graphics driver GFX_WIN10_64_220.127.116.1178) as it is the only audio driver that works consistently well with my setup.
When I install the audio driver that comes with graphics driver GFX_WIN10_64_18.104.22.16886_BN, I get no sound whatsoever through HDMI.
I was able to restore HDMI audio with a fresh install of Windows 10 1809. The NUC was already patched with latest bios 0076, HDMI Firmware Update Tool 1.72 installed. After installation latest chipset and ME drivers were applied.
Microsoft provided an Intel graphics display driver during the installation of Windows 10 that had a later date than GFX_WIN10_64_22.214.171.12486_BN, but there was no evidence of an Intel display audio device in control panel so it could not be configured.
I was able to uninstall the Microsoft-supplied graphics display driver along with its associated display audio driver from device manager, and install GFX_WIN10_64_126.96.36.19986_BN which now has stable audio. I do not need to manually install display audio driver version 10.22.1.100 any more.
I do not intend to update to the DCH driver as long as audio with GFX_WIN10_64_188.8.131.5286_BN remains stable
Thanks. I installed the latest Graphics DCH driver, but same result. No HDMI audio. Fortunately I was still able to manually install display audio driver version 10.22.1.100 along with the DCH graphics driver, and audio with that still works perfectly well.