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The HDMI Forum rejected AMD's open source HDMI 2.1 implementation
(www.gamingonlinux.com)
This is a most excellent place for technology news and articles.
are you unable to use display port?
The OLED TV probably only has HDMI. TVs don’t normally have DisplayPort
There are DisplayPort to HDMI adapters. Like this one:
https://www.amazon.com/dp/B08XFSLWQF
None of the adapters seem to support VRR though, for whatever reason.
Same reason probably: the HDMI forum
Freesync works for me with that cable, but I have some awful cable training problem or something. Everytime the screen is reset, it refuses to go above 4k60 or turn on freesync, and it'll only work again after I have the screen connected for a few minutes. So whenever I start my comouter, have to switch down 4k60 and wait like half an hour to be able to use high refresh rate. It's been doing this for months.
I don't know if I have a bad cable, weird interference, or if FRL adapters are just flaky.