Hello Chris, for this kind of issue we have this work around.
- Install latest graphics driver. Please choose the operating system you are using and install it Download Center
- Restart the system and access device manager and uninstall the audio driver.
- Install the audio driver provided by the manufacturer.
By doing this the issue should be fixed.
I tried doing this:
- I have already installed the latest Intel graphics driver
- I uninstalled the two HD Audio drivers in device manager
- I downloaded and installed the Audio drivers from Gigabyte's website (Realtek audio)
Apart from adding a new icon to the tray at the bottom of the screen this hasn't made any difference to the way the HDMI audio behaves. As soon as I put the amp into standby and turn it on again there is no audio and device manager shows the following error message against the high definition audio controller:
"This device cannot start. (Code 10)
The requested operation was unsuccessful."
Any other ideas?
I have been in touch with the motherboard manufacturer (Gigabyte) who recognise the problem and state that: "It is related to Intel driver not detecting hot plug monitor with audio function."
I have attached a screenshot from Gigabyte that represents exactly what I see when I unplug the HDMI cable or turn off the receiver.
Searching the forums indicates that lots of people are experiencing this problem - it's pretty widespread, and all of the evidence appears to be indicating it's an issue with the Intel drivers.
Any further ideas/help would be appreciated.
I am also having this exact problem with my Haswell Win 8.1 setup. The second I turn off my upstream HDMI receiver (Onkyo TX-NR905) the Intel Display Audio device will disappear from the "Sound, video and game controllers" section, and I will get an exclamation mark on the "High Definition Audio Controller" under "System devices". And from there the only option is to reboot the system to get the audio back. Picture is working as expected.
Hardware: Asrock Z87E-ITX (bios 2.10) + i5-4570T
Tested every driver combination avilable from both intel and Asrock (including audio driver 3129), and they all fail the same way. I have even tried using combinations of various audio drivers from different driver packages (as suggested as a solution in another thread) with the same result.
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I wanted to let you know that I have found a work-around for the problem that I'm happy to live with for now. It doesn't fix for the Intel bug per se, but it does allow the overall HTPC system to operate as it should for minimal expenditure/extra clutter.
I bought a cheap HDMI switch, which when installed between the PC and the AV receiver seems to resolve the audio problems. The switch in question is a Duronic [HRS1031] 3 Port HDMI Auto Switch Box plus Remote - 3x1 HUB (3 way input 1 output) 1080p Full HD Switcher and it cost about £10 from Amazon.
This switch doesn't require any power input (power is drawn from the HDMI connection) and it's a small box so can be hidden away quite well. I can now turn the receive off or change inputs and when I turn it on again the HTPC is still outputting audio.
Hope this is helpful for others while we wait for Intel to fix the bug.