Steam Hardware

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Why won’t Steam Machine support HDMI 2.1? Digging in on the display standard drama. (arstechnica.com)

submitted 2 days ago by Fubarberry@sopuli.xyz to c/steamdeck@sopuli.xyz

140 comments fedilink hide all child comments

The TL;DR is that the organization that controls the HDMI standard won't allow any open source implementation of HDMI 2.1.

So the hardware is fully capable of it, but they'll get in trouble if them officially implement it.

Instead it's officially HDMI 2 (which maxes out at 4k @ 60Hz), but through a technique called chroma sub-sampling they've been able to raise that up to 4k @ 120Hz.

However there are some minor reductions in picture quality because of this, and the whole thing would be much easier if the HDMI forum would be more consumer friendly.

In the meantime, the Steam Machine also has display port as a completely issue free display option.

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[–] ngdev@lemmy.zip 4 points 2 days ago (1 children)

i want to say you can buy an adapter to get dp 1.4 out of steam machine and into hdmi 2.1 on a tv and should be fine. just has to be a powered adapter i believe

[–] Truscape@lemmy.blahaj.zone 9 points 2 days ago (1 children)

The powered adapters are for the other way around. DP has support for HDMI out without additional components, but ofc the HDMI forum makes converting HDMI to DP like pulling teeth.

[–] crater2150@feddit.org 1 points 7 hours ago

You also need a powered adapter for HDMI 2.1 in this case. The passive adapters work, because the DP output on the computer usually supports switching to HDMI output. But for that to work, the driver must support it, so it has the same problem as the HDMI port (which supports 2.1 on a hardware level, but not with AMDs open source drivers)