Just video but no audio

Hi!
I have a big issue with Libreelec and my Onkyo 609 receiver, the issue was also present with Openelec, so I assume it is connected to my specific setup.
Anyway, I have been running on an older OpenElec release (5.0.8) for quite some time (as later releases didn't work in terms of audio output). I decided to have a go with Libreelec instead, but I get the same issue as I had with the later Openelec releases.

I get no audio output, only video. It is pretty obvious that it is connected to the Onkyo, as it works as it should when connecting it directly to a TV without the receiver. I have enabled audio pass through for all of the types, without success.

Anyone have a clue? I can attach a logfile later on when I am back home.

HW: Asus E45M1-i with a HD 6320 GPU (Realtek® ALC892 8-Channel High Definition Audio CODEC)
Onkyo 609
Benq W1070

//Exile

Quote from DaVu

Yes...we'll need the logfile

Certainly, sorry for creating this thread before I had these in my possesion. I have the logfiles, please let me know if they are not detailed enough.
01_Kodi.log

Okay, I just experienced a very strange thing. I decided to retrieve some debug logfiles instead of these more general ones. When the HTPC started I had audio!! One drawback was that the resolution was 640x480p (instead of the desired 1920x1080p), I retrieved the debug logfile, attached to this post as debugfile_1. I had a quick look at the audio settings (note that the output device is ALSA: HD-Audio Generic, @@@):

I decided to restart the HTPC, and change the resolution and get a new debug logfile. But then the audio wasn't working again, and I did no changes to the settings that may have created this behavior. I took a new screenshot on (this time, note that the output device have changed slightly (ALSA:HD-Audio Generic, HDMI), the video output remains the same though:

The change of audio output (no "@@@") causes the system to not send any audio. In fact, the audio stream is not available at all (grayed out):

I have added the debug log file below, debugfile_1 is the one where everything worked. Debugfile_2 also contains the issues I had after rebooting

Please let me know if you require more information of me. I am stuck for the moment, I don't know how to move forward.

Is more information needed from my side?

Quote from DaVu

could you please try the following....

Set the output configuration to "fixed" and set it to 48? Does that help?

Thank you for your feedback, it is very appreciated. I tried this setting but no luck. Strangely though, when I started the HTPC tonight, the audio worked, again. But only the first time, after a reboot of the computer I am back to square one. There is no way to force the sound back. I tried to shut everything down to do it again, with the exact same pre-requisite, but no change.
[hr]
After some extensive testing I now know what causes the error, but really dont know how to fix it. The issue seems to be connected to my projector. When I start the system, I tend to start the computer first, then the receiver, and the projector last. Everyone that owns a projector knows that the projector don't light up instantly, for me it can take up to 20-30 seconds. This will make the audio work everytime I start the system. But it does not work if I reboot the computer, since the projector is running at that time.

So, I tried to shut everything down again, and then started up again. It works. So there is something with the settings regarding Projector or Projector<->Receiver.
Or can I bypass this issue with a setting in Kodi? The workaround is good enough, for now, but I would really want to fix this very very annoying issue.