Valve has pushed the first early build of SteamOS 3.10 to Steam Deck users on the Preview channel. The update rebases the underlying platform onto Linux kernel 7.3 and moves the desktop environment to KDE Plasma 6.8.2. Players can install the test build through system settings, though Valve cautions that early preview releases may contain stability bugs.
Valve updated the base Arch Linux packages and upgraded the desktop interface from KDE Plasma 6.7.3 to version 6.8.2. The update addresses several daily operational bugs. A false warning that flagged normal power supplies as slow chargers has been resolved. System code now prevents Bluetooth audio from dropping when users switch between desktop mode and gaming mode. Valve also included updated timezone definitions for select territories.
Gaming mode gains support for the VK_EXT_present_timing extension alongside display controls for the ASUS ROG Xbox Ally X20. The update enables proper HDR and brightness controls on that third party device. Display optimizations target variable refresh rate setups. The frame limiter delivers more consistent frame pacing with VRR enabled, while interface flickering during idle states has been reduced. Mouse cursor movement in games running at 30FPS or higher now matches active rendering speeds rather than forcing screen refresh rates to their maximum limits. Visual bug fixes correct blown out highlights in HDR titles like Control, alongside stuttering and frame errors in UBOAT and The Fruit of Grisaia.
Driver updates apply to AMD and NVIDIA hardware. AMD graphics gain support for HDMI 2.1 VRR, Fixed Rate Link, and Auto Low Latency Mode, though Valve notes an open bug where Dell G3223Q displays can remain black. NVIDIA GPUs on Turing architectures and newer now support Mesh Shaders, resolving rendering problems in Shadow of the Tomb Raider and The Surge 2. Rebuilding the operating system around Linux 7.3 matches upstream code merges for the 2026 Steam Controller, laying architectural groundwork for upcoming hardware projects including Steam Machine and Steam Frame devices.
