Valve has updated the Steam client beta to automatically launch non-Steam Windows applications through its Proton compatibility tool on Linux, streamlining how players run third-party software on Linux desktops and SteamOS devices. Phoronix reported that Valve rolled out the client update on Oct. 7, 2026, delivering several targeted adjustments to the platform’s Linux gaming experience.
Under the new beta behavior, any Windows executable file registered within the client as a non-Steam game automatically defaults to executing via Proton. As TechPowerUp reported, the change removes a manual step in the desktop software configuration process. Previously, users had to inspect game properties and explicitly enable Proton compatibility layers to run Windows executables; the new default allows programs to attempt launching immediately, leaving users to adjust compatibility options only if an application fails to start. TechPowerUp noted that this adjustment aligns with ongoing work to refine Steam and SteamOS while shifting compatibility burdens away from end users.
The beta release also resolves several Linux-specific client flaws that previously disrupted game management. Both Phoronix and TechPowerUp noted a fix for a bug where non-Steam games failed to launch if a user changed the target binary using the client’s file browse button. Additionally, the patch corrects an issue where Steam’s “Stop” interface button failed to terminate games that had been initiated through an external launch tool, restoring process management directly to the Steam client.
Display management and controller input received corresponding updates in the beta. Valve implemented a dedicated setting in Big Picture mode allowing users to disable the desktop screensaver while running a game. For controller hardware on Linux, the update fixes a Steam Input bug where attempting to swap gamepads on the “Reorder controller” screen would fail to register changes.
The update extends beyond Linux-specific tweaks to address general client data tracking and peripheral firmware behavior. According to the release notes published by Valve and covered by TechPowerUp, the general client received a bug fix for an issue where library playtime values temporarily displayed incorrect numbers. Valve also issued a firmware patch for the Steam Controller, resolving a condition where switching the controller into Bluetooth Low Energy (BLE) mode would stick indefinitely even when the peripheral could not find a host device.
The feature set and bug fixes currently remain confined to the opt-in Steam Client Beta channel. Valve published documentation for the release through SteamPowered.com but has not specified when the automated Proton defaults or firmware corrections will transition into the stable Steam client branch. Until Valve promotes the build to the general release, users running standard public versions of Steam must continue to manually configure Proton compatibility settings for non-Steam Windows executables.