Guys I'm out of ideas. I've tried to get audio running on my Raspberry Pi 4 Model B (4GB RAM) I've tried it with Buster Full/Lite and LibreELEC. connected to my Samsung 4K screen via HDMI Same situation: Resolution max 1024x768, which tells me it doesn't properly recognise it. what did work was to manually add a FullHD mode, but thats just the lesser issue, yet might be a pointer to the actual issue.
I have no audio, HDMI (either port) or Composite, it is the same. I've tried forcing HDMI mode to exclude DVI several and different OS, to no avail. Does the Pi 4 need some special treatment to get it to work? The only thing which comes to mind is the power supply lacks about 0,3W of the recommended setting, could that be a cause?