Comment on Steam Hardware [new Steam Controller, Steam Machine, and VR headset Steam Frame, coming in 2026]
1Fuji2Taka3Nasubi@piefed.zip 13 hours ago
I wonder why only HDMI 2.0 on the Steam Machine, ‘cos RDNA3 is capable of HDMI 2.1 and you need it to go over 4k 60Hz (I know it says 4k 120Hz for the Steam Machine’s HDMI but I suspect that’s either 4:2:2 color or DSC if it is really HDMI 2.0).
amdgpu (the Linux driver) does not support HDMI 2.1 because the HDMI Forum does not allow them to open source their implementation.
Valve would have to provide their own solution and I assume they have not been able to deal with the crooks at the HDMI Forum yet either.
The HDMI Forum doesn’t allow opensource HDMI 2.1 drivers, AMD has the drivers ready but they aren’t allowed to release them. Yes, it’s that stupid
I think malicious is the correct word for it.
I believe they mentioned that it is basically HDMI 2.1 but some features weren’t supported maybe 4:2:2 color, I don’t remember. I think they also mentioned they are working on fixing it so they can call it HDMI 2.1 but they aren’t sure if they can so they are just calling it 2.0 right now to be safe.
BetaDoggo_@lemmy.world 2 hours ago
It’s the HDMI forum’s fault, they won’t allow amd to add HDMI 2.1 support to their Linux driver. It’s very possible that the hardware itself does support 2.1.
More detailed explanation here: www.phoronix.com/news/HDMI-2.1-OSS-Rejected