Valve has rolled out SteamOS 3.8.28, expanding device compatibility, boosting graphics performance with a new Mesa driver, and refining system support for a range of Valve and third-party handheld devices.
Valve has pushed SteamOS 3.8.28 into the stable channel, broadening support across the Steam Deck, the Steam Machine and a growing list of third-party handhelds. The update is not a single-feature release but a wide maintenance pass, with performance work, hardware fixes and compatibility improvements aimed at both Valve devices and systems from MSI, Lenovo, OneXPlayer and AYANEO.
One of the most consequential changes is a new major Mesa graphics driver release. According to Valve’s release notes as relayed by GamingOnLinux and Steam’s own news posts, the update brings notable ray-tracing gains, along with broader graphics and functionality improvements. Valve also says VRAM management has been significantly improved, which should help devices that run close to their memory limits, where stability and frame pacing can suffer.
The company has also tightened several areas of system behaviour. The Steam Machine splash screen now appears faster during startup, while the Steam Controller Wireless Adapter from 2015 can now wake supported hardware. Valve says it has added preliminary support for the Steam Frame Wireless Adapter as well. Battery reporting has been refined for situations in which a device is drawing more power than the charger can supply, which should make charge-state feedback more accurate.
Controller support has been extended further too. The built-in hid_steam driver now supports the Steam Controller model released in 2026, allowing native controller applications to use it even when Steam is not running. That is a useful change for users who want input support at the system level rather than only inside Valve’s client. The update also addresses a number of peripheral issues, including Bluetooth instability with the Nintendo Switch Pro controller and a rare startup delay on some games when no audio source is detected.
Non-Valve handhelds receive a large share of the fixes. Valve says support for MSI Claw and OneXPlayer variants has been improved, with initial gamepad support added for the MSI Claw 8 EX AI+, Konkr FIT and AYANEO Pocket S2. The release also adds controller support for some OneXPlayer F1 and OneXPlayer 2 special edition models, while fixing regressions affecting button detection, gyro initialisation, rumble and battery display on several Lenovo Legion Go and MSI Claw configurations. Valve has also updated the Linux kernel to 6.18.50, signalling that the SteamOS line continues to track newer upstream components while the company prepares the next 3.9 preview cycle.
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