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2026-09-11 · Source：TechPowerUp
Patches on the Linux kernel mailing list point to HDMI 2.1 FRL support, including AMD FreeSync, VRR and Auto Low-Latency Mode, arriving upstream in kernel 7.4 due October 2025.
For many players in the Linux world, HDMI 2.1 has long stood as a goalpost — and among those chasing it were Valve and AMD, both of which previously worked on an open-source implementation of HDMI 2.1 drivers for the Linux kernel despite roadblocks from the HDMI forum. That effort now appears close to paying off. The Linux kernel mailing list cites patches that will likely be merged into the upstream kernel driver stack in Linux kernel 7.4, putting the standard within reach of the mainline kernel.
According to the merge request, HDMI 2.1 FRL will be landing in Linux with support for AMD FreeSync, VRR, and Auto Low-Latency Mode. All three features should be very useful for desktop gamers, and equally so for couch gamers on machines like the Valve Steam Machine or its many SteamOS-touting alternatives, where variable refresh behavior and reduced latency directly shape the living-room experience.
On timing, Linux kernel 7.4 is slated to land in October 2025, although an exact release date has yet to be determined. The mailing-list posting frames the patches as likely — rather than confirmed — candidates for the upstream driver stack, meaning the merge decision will play out over the coming development cycle ahead of that release.
There is a notable gap on Valve's side. The company previously declared the HDMI 2.1 work complete for the Steam Machine, yet it seemingly has yet to implement the new driver in SteamOS — the Steam Machine product page still cites HDMI 2.0. That discrepancy persists until SteamOS adopts the upstreamed driver.
Mots-clés: Valve · AMD · Linux Kernel 7.4 · HDMI 2.1 · SteamOS · FreeSync
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