When HDMI 2.1 isn't HDMI 2.1 – the confusing world of the standard
2021 HDMI is a disaster. I&#x27;m using a Sony flagship TV, a PC, and a popular Sony 7.1 receiver.<p>I had to update my graphics card to get 4k120 444 10bit and eARC.<p>Only eARC is totally broken - audio often doesn&#x27;t work at all without restarting PC&#x2F;TV&#x2F;receiver a few times. And then once it &quot;works&quot; it will randomly cut out for 5-10 seconds at a time.<p>HDR on windows is also totally broken. It was a nightmare to get something that correctly rendered full 10bit HDR video (I ended up having to use MPC-HC with madvr and a ton of tweaking).  You also have to <i>turn off</i> windows HDR support and use D3D exclusive mode. After updating my TV to get DRR, the audio for this setup stopped working.<p>Linux also has zero HDR support. Didn&#x27;t have luck getting 5.1 or 7.1 working either.<p>MacOS can at least handle HDR on Apple displays - not sure if it works on normal displays. Haven&#x27;t tried surround sound.