Valve has pushed a fresh beta of its Windows-to-Linux compatibility layer, with Proton 11.0-1 Beta 2 targeting a handful of regressions that surfaced in the Proton 11 branch. The update is a small one, focused on stomping out bugs rather than introducing new features, but it restores playability for several titles that had broken on Steam Deck and desktop Linux.
The headline fix addresses controller input issues in Deus Ex: Mankind Divided, a long-standing irritant for gamepad users on Linux. Valve has also rolled back Proton 11 regressions affecting BattleBit Remastered and Assassin's Creed Shadows, both of which are once again playable. Terraria should no longer run worse than it did under Proton 10, and Arma 3 workshop mods will stop forcing unnecessary updates on every launch.
Proton is built on top of Wine and DXVK, and its source code lives on GitHub. Steam users can opt into the beta through the compatibility tool selector in any game's properties menu, with the stable release expected once the regressions shake out.
