Valve has been steadily refining SteamOS, and its latest efforts show a shift from adding new features toward fixing bugs and polishing the overall experience. Since the Steam Deck and Steam Machine launches, much of the operating system's development had centered on expanding support for games, hardware, and other platforms such as Lenovo's and ASUS's gaming handhelds. Starting with SteamOS 3.8, Valve appears to be dedicating more attention to stability and performance.
The SteamOS 3.8.26 beta is dedicated entirely to bug fixes in both desktop and gaming mode, along with a few tweaks aimed at improving VR support ahead of the Steam Frame launch. The most notable fix addresses performance degradation in games and features that require composition, an issue most commonly seen when FSR is enabled. Valve also resolved a Firefox freezing bug in Desktop Mode, fixed an issue that allowed unreadable desktop resolutions below 640x480, and corrected SD card-related freezing bugs affecting the Steam Deck and MSI Claw handhelds.
Additional fixes in the 3.8.26 beta target specific hardware compatibility issues, including a Wi-Fi connectivity regression on the MSI Claw A1M, battery display problems on Lenovo Legion Go models, and Bluetooth instability with the Nintendo Switch Pro (v1) controller. The update also addresses a bug that caused Unreal Engine 5 VR games to display a blank right eye. While these changes may seem minor individually, ensuring reliable core functionality is seen as essential for SteamOS to compete as a gaming OS in a space still dominated by Windows.
Following that beta patch, Valve announced the SteamOS 3.9.0 Preview, which upgrades Desktop Mode from KDE 6.4.3 to KDE 6.7.3 and updates the Linux kernel to version 7.2. The KDE upgrade brings improvements such as better Krunner search functionality, clipboard pinning, and enhanced support for drawing tablets, while the kernel update includes performance improvements for Intel Arc B390 hardware and adds USB4Stream support for device-to-device sharing over USB4.
Beyond these headline upgrades, Valve has made configuration changes intended to make SteamOS easier to use. The system switches back to the wpa_supplicant backend to improve network compatibility, improves bootloader compatibility with third-party builds and motherboards, and unlocks the Desktop Mode lock screen option in settings. Valve has also implemented preliminary support for hibernation in SteamOS, though this feature is not yet exposed to users.