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this post was submitted on 09 Dec 2025
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Be a shame if it leaked on the internet.
I'm going to guess it would require kernel support, but certainly graphics card driver support. AMD and Intel not so difficult, just patch and recompile; NVIDIA's binary blob ha ha fat chance. Stick it in a repo somewhere outside of the zone of copyright control, add it to your package manager, boom, done.
I bet it's not even much code. A struct or two that map the contents of the 2.1 handshake, and an extension to a switch statement that says what to do if it comes down the wire.
nvidia has HDMI 2.1 last I checked.
They can do it because their driver (even nvidia "open") is a proprietary blob
nouveau? Switch between drivers if you wanna use HDMI 2.1 or proprietary nvidia when you wanna game! It won't make any sense, but it will piss off the right people :D
It probably already has been, and Steam likely already has the specification. They just can't open source an HDMI 2.1 implementation without consequences.