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Comment by preisschild | Hacker News Reader

Yeah but this is for amdgpu and they had DP2.1 support for a while now.

I ran fiber optic HDMI from my office to my living room for 4K120 HDR+VRR couch gaming with no added latency or loss in quality. Works great. My LG C1 even supports FreeSync so VRR even works, but I have to route the HDMI directly to the TV. My receiver does not support FreeSync and only supports HDMI VRR. Presumably with this patch I will be able to run HDMI 2.1 VRR through my receiver and not have to treat my desktop as a special input.

It's just nice when technology is not hampered by nonsense.

AMD RX 6700 XT from 2021 only has DP1.4 (but HDMI 2.1).

Dell U5226KW from 2026 only has DP1.4 (but HDMI 2.1).

I don't think I have seen anything above DP1.4 in the wild for now.

Also interesting is the Steam Machine with its AMD RX 7000 series GPU only has DP1.4 even though those GPUs should be able to do DP2.1

That doesn't help when the monitors don't have DP2.1 support.

I havent seen a monitor (besides tvs) that has HDMI2.1 but not DP2.1

I can tell you mine does: a Corsair XENEON 27QHD240. Or the somewhat popular and badly named Acer Nitro XV275K P5biipruzx

I'd say it's usual for displays released in the 2-5 years old range. HDMI 2.1 got somewhat quick monitor support for consoles, but search for "first DP2.1 monitor" gets results from 2024

And that parenthetical is exactly why people care.

TVs.

lots of linux based boxes are used with TVs.

Plenty of high refresh gaming monitors out there that use HDMI 2.1 or DP1.4 with DSC.

DSC is just the "card up the sleeve" for DP1.4, you can push it all the way to 4K 240hz HDR. So there is little incentive to switch to DP2.1 for OEMs.

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