Sweet. Soon I won't be chained to shitty android boxes for 4k streaming needs.
this post was submitted on 04 Jun 2026
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Why? HDMI 2.0 works fine.
Try Linux on a 4k HDR 120hz TV and see what happens.
This is only being fixed because Valve is releasing an HDMI console and pressuring both AMD and the HDMI forum to get their shit together. Although AMD has attempted to get it done in the past, it is only being addressed now.
I thought it was being pushed now because mkopec managed to implement a partial, clean room reverse engineered version first using register captures from the Windows driver.
On the technical side, yes.
I've been using linux with 4k120 tv with amd gpu for about half a year. dp to hdmi 2.1 cable works without issues.
Add HDR and VRR and come back.
hdr works i believe (i don't use it, like it, so not sure) and if i understood correctly, vrr won't work in kernel 7.2 either
Try Linux on a 4k HDR 120hz TV and see what happens.
It works fine, with chroma subsampling. At least I personally don't ever notice it on the TV.
That's not to say this getting fixed isn't important, but it's mostly relevant for monitors and maybe smaller TVs that you sit closer to.
With subsampling yes, but if you add VRR it's not enough bandwidth.
VRR doesn't require additional bandwidth.
What content is streaming at 120hz? Otherwise, 4K 60hz HDR is fine on 2.0
Videogames
4K 60hz is about 18GB/s and it's being sent down a 1GB/s pipe typically when streamed. You're not getting all the data. It's really compressed to fit and the color space is usually set to 4:2:0 to again save bandwidth.
But you said 120hz
so that would need twice the bandwidth of 60hz, meaning even more compression.
4K 60hz is about 18GB/s and it's being sent down a 1GB/s pipe typically when streamed. You're not getting all the data. It's really compressed to fit and the color space is usually set to 4:2:0 to again save bandwidth.
4K 60Hz HDR is still limited to 8 bit color, which is unsuitable for HDR. You'd have to go down to 30Hz to get 10 bit color on HDMI 2.0.
Meanwhile with this patch, I can do 4K 120Hz with 12 bit color.
It's only limited to 8 bit in 4:4:4 color space. It can do 10 bit 4K 60hz in 4:2:0 color space, which most things are streamed at because it is such a bandwidth saver.
Lol, streaming. Paying for multiple subscriptions. Passively consuming media.
What is your solution for content streaming. I'm ready to pop mine into a clay disk thrower.
I use Nvidia Shield Pro.
LPT: Your Shield can run Lineage OS
https://gitlab.freedesktop.org/agd5f/linux/-/commits/drm-next-7.2
Source is here for anyone who wants to build it themselves.