Valve has pushed out the beta for SteamOS 3.8.6, and the headline addition is preliminary support for native HDMI Variable Refresh Rate. Until now, getting working VRR over HDMI on Linux has been a years-long saga, held up by HDMI Forum restrictions that kept the HDMI 2.1 specification out of open source drivers.
The new build enables initial HDMI VRR on devices with native HDMI output, sliding into place alongside AMD's ongoing effort to upstream its HDMI 2.1 implementation into the mainline Linux kernel for the AMDGPU driver. Valve getting ahead of that mainline milestone underscores how tightly the company has been working with AMD to unblock the feature for Steam Deck dock users and other AMD-powered Linux gaming setups.
Beyond the VRR work, the 3.8.6 beta adds controller support for the MSI Claw and the OneXPlayer APEX and X1 handhelds, along with assorted bug fixes and refinements to existing handheld support. That continues SteamOS 3.x's gradual expansion beyond the Steam Deck itself, as Valve preps the OS for the broader handheld ecosystem now that third-party hardware is starting to ship with official SteamOS images.
