Mac-mini -- Denon AVR-1910 -- Samsung HDTV on HDMI

Hi,

I have mi Mac mini connected via HDMI port to the Denon AVR 1910. My HDTV (Samsung le37b530p7w) is also HDMI-connected.

The very annoying issue I have is that image and sound "flicker" (go off and on) constantly.

When it does, I see HDMI, PCM, DTS indicators on the Denon going on and off.... like Mac-Mini and the Denon were syncing/handshaking. The TV image go on and off, and it indicates "searching signal".

I tried connecting the mac mini directly to the HDTV, the flickering thing did not happened.

I does not occur either with my TV Box or DVD/BR player.

I've tried all HDMI ports on the TV and the Denon AVR. It always happens, and only occurs when the mac-mini is displaying something.

However, when I'm listening music on the mac mini, but the TV is off (no image on the TV, but the sound goes through the Denon AVR), the flickering does not occur.

I've read similar issues on the forum, but not real solution.

Any help?

Hardware detail:

Mac mini: late 2012, OSX El Capitan 10.11.4

Denon AVR 1910

Samsung HDTV le37b530p7w