https://www.heise.de/en/news/Valve-HDMI-Forum-Continues-to-Block-HDMI-2-1-for-Linux-11107440.html heise+ entdecken Suchen[ ] heise Plusheise PlusAbo Suchen[ ] * * * * * * Alle Magazine im Browser lesen IT News * Newsticker * Hintergrunde * Ratgeber * Testberichte * Meinungen Online-Magazine * heise+ * Telepolis * heise autos * bestenlisten * tipps+tricks Services * heise shop * heise jobs * heise academy * heise download * heise preisvergleich * Tarifrechner * heise compaliate * Abo bestellen * Mein Abo * Netzwerktools * iMonitor * Loseblattwerke * Spiele Uber uns * heise medien * heise regioconcept * heise business services * SponsoringLogo Hannover 96 * Mediadaten * Karriere * Presse Anzeige * Themenspecial ChromeOS * Newsletter * heise-Bot * Push-Nachrichten ${title} ${title} ${intro} ${title} ${lead} ${title} ${title} ${intro} ${title} ${lead} ${content} heise+ Das Beste aus heise+ Zur heise+ Startseite ${content} heise online Top-Beitrage von heise online Zur heise online Startseite ${content} heise online Most popular articles by heise online ${content} * Newsticker * Security * IT & Tech * Developer * KI * Entertainment * Wissenschaft * Bestenlisten * Adventskalender * Digital Health * Foren * Alle Themen[arrow-righ][arrow-righ] Anzeige Themenspecial ChromeOS Advertisement Valve: HDMI Forum Continues to Block HDMI 2.1 for Linux Technically, the Steam Machine supports HDMI 2.1. However, Valve and AMD are not allowed to offer an open-source driver for it. listen Print view Steam Machine on a beige background (Image: Valve) Dec 8, 2025 at 9:24 pm CET 2 min. read By * Mark Mantel Advertisement The HDMI Forum, responsible for the HDMI specification, continues to stonewall open source. Valve's Steam Machine theoretically supports HDMI 2.1, but the mini-PC is software-limited to HDMI 2.0. As a result, more than 60 frames per second at 4K resolution are only possible with limitations. Continue after ad In a statement to Ars Technica, a Valve spokesperson confirmed that HDMI 2.1 support is "still a work-in-progress on the software side." "We've been working on trying to unblock things there." The Steam Machine uses an AMD Ryzen APU with a Radeon graphics unit. Valve strictly adheres to open-source drivers, but the HDMI Forum is unwilling to disclose the 2.1 specification. According to Valve, they have validated the HDMI 2.1 hardware under Windows to ensure basic functionality. Videos by heise mehr Videos * c't 3003 * heise & ct * Peertube No Change After Almost Two Years The restriction imposed by the HDMI Forum was already criticized in early 2024 by an AMD employee responsible for Linux. Even then, according to AMD, they had submitted a functional, HDMI 2.1-compatible driver, which the HDMI Forum rejected. "Unfortunately, the HDMI Forum rejected our proposal," it was stated at the time. "At this time an open source HDMI 2.1 implementation is not possible without running afoul of the HDMI Forum requirements." Only HDMI 2.1 offers sufficient bandwidth for 120 or 144 Hertz at 3840 x 2160 pixels without compression. Furthermore, this version introduced manufacturer-independent variable refresh rates (HDMI VRR). Valve enables 4K and 120 Hertz using chroma subsampling, a compression technique that is particularly noticeable with text. VRR functions in the form of AMD's Freesync, which requires compatible displays. Continue after ad Alternatively, interested parties can use an active adapter from DisplayPort 1.4 to HDMI 2.1 to increase the frame rate without compression. However, they do not officially support VRR. Popular variants from Club3D are no longer available; offers from less well-known providers (starting from 35,67 EUR) are still available in price comparisons. Melden Sie sich zum KI-Update an Melden Sie sich zum KI-Update an Melden Sie sich zum KI-Update an Melden Sie sich zum KI-Update an (mma) Don't miss any news - follow us on Facebook, LinkedIn or Mastodon. This article was originally published in German. It was translated with technical assistance and editorially reviewed before publication. Dieser Link ist leider nicht mehr gultig. 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