The licensing group that controls the HDMI standard, the HDMI Forum, has reportedly told AMD that it does not allow an open source implementation of the HDMI 2.1 (or HDMI 2.1+) specification, blocking tools such as AMD’s FreeSync from working over HDMI connections at resolution/rate combinations like 4K at 120 Hz,

Is this why I’m getting screen tearing on my 4k 120Hz OLED that’s Freesync when I’m using the latest HDMI cable tech? You can’t really get modern TVs with DP ports unfortunately, as much as I’d like them to run off of my desktop.

Sounds like someone needs to get off their high horse and contribute.