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Proton 11.0-2 Release Candidate testing

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ValveSoftware/Proton#9998 · opened 2026-07-22 by ivyl · updated 2026-08-25 · 4 comments · github
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Iivyl 2026-07-22 github

Hey all!

We've put together a new Proton 11.0 Release Candidate build for you to test.

In the Steam client the Proton 11.0 app should have a release-candidate beta branch (look for Proton 11.0 in your Steam Library, right click -> Properties... -> BETAS) which you can choose to start testing the 11.0-2 Release Candidates (note that the name of the build in the Steam Settings dialog will not be updated). I will post changes here when we push new builds. The source for the latest RC build is available on the proton_11.0-rc branch in this repository. This branch may be force pushed.

We are interested only in issues that are new to the 11.0-2 RC builds. If you believe that something broke please confirm that the problem does not occur with 11.0-1 (the "none" beta branch) before reporting it here.

The changelog is tentative - it has not yet been verified by our QA staff, and can change before the final release as we add or remove features during RC testing.

Most if not all of the fixes listed below were deployed previously via Proton Experimental or Proton Hotfix. Appropriate Proton version was used automatically on a game basis on the Steam Decks. This release stabilizes those changes after extensive testing.

The Changelog

  • Now playable:
    • AsteroidsHD
    • Heroes of the Three Kingdoms 7
    • Konkan Coast Pirate Solutions
    • Otherworld Legends 战魂铭人
    • Plain Sight
    • Portal Worlds
    • SMILE GAME BUILDER
    • Tetrageddon Games
    • Warhammer: Dark Omen (Classic)
  • Fixed Proton 11 regressions:
    • CEG-using games should no longer take extra time to start.
    • Command & Conquer: Generals, Command & Conquer: Renegade, Command & Conquer Generals Zero Hour, Command & Conquer Red Alert 3, Command & Conquer Red Alert 3, Command & Conquer 3: Kane's Wrath and Command & Conquer 3: Tiberium Wars should detect custom Steam Workshop levels again.
    • Terraria should no longer perform worse than on Proton 10.
    • Improved rendering of the Imperiums: Greek Wars launcher.
    • Arma 3 workshop mods should no longer unnecessarily update on each launch.
    • Source SDK 2007 and Source SDK 2013 Singleplayer should no longer fail to find gameinfo.txt.
    • Natural Selection 2 should be able to connect to servers again.
    • The Talos Principle and The Talos Principle VR should no longer incorrectly show the login window on launch.
    • The King of Fighters XIII Global Match should no longer leak memory.
    • Resident Evil 2 should no longer have issue with using low resolution full screen mode on high resolution screens on certain setups.
    • Homeworld 2 Classic from Homeworld Remastered Collection should now behave correctly on alt+tab.
    • SHOGUN: Total War no longer should end up on a black screen after alt+tab.
    • Need for Speed Hot Pursuit Remastered now has working input when set to fullscreen mode on SteamOS.
    • Addressed performance regression affecting Exanima on certain setups.
    • Improved rendering of the Imperiums: Greek Wars launcher.
    • Crysis 2 Remastered should no longer hang on game load when ray tracing is enabled.
    • Borderlands Game of the Year Enhanced should no longer fail to launch with initialization error.
    • The Coma 3: Bloodlines is playable again.
    • Debug menu in SCP: Secret Laboratory works again.
  • Fixed Worms Armageddon ignoring system locale when suggesting language upon team creation.
  • Fixed Diablo IV not being playable after a recent game update.
  • Fixed Trove Public Test Server failing to launch after a recent game update.
  • Fixed Metal Gear Solid V: The Phantom Pain not being playable after a recent game update.
  • Fixed Marvel Rivals crashing after a recent game update.
  • Fixed Arc Raiders not being playable for some users after a recent game update.
  • Fixed Helldivers 2 not launching after a recent game update.
  • Fixed Call of Duty (2003) rendering wrong colors in the main menu.
  • Fixed Path of Exile crashing caused by specific text in chat.
  • Fixed No Limits 2 Roller Coaster Simulation rendering wrong colors with Nvidia GPUs on Wayland.
  • Fixed Rocket League incorrectly detecting re-plugged DualShock 4 and DualSense controllers as an additional device.
  • Fixed a memory leak in HITMAN World of Assassination.
  • Fixed Vagante freezing on character select on setups with using Wayland with Nvidia GPUs.
  • Fixed Warhammer: Dark Omen (Classic) displaying low resolution map on certain setups.
  • Fixed gamma issues in Exanima showing up on certain setups.
  • Fixed Forza Horizon 4, 5 and 6 showing black screen on recent SteamOS versions.
  • Fixed Forza Horizon 6 auto-closing after system suspend/resume.
  • Fixed Rocket League, Tom Clancy’s The Division 2 and Squad not starting when set to non-English locale.
  • Improved reliability of controller hotplug.
  • Fixed KeepUp Survival having bad performance and crashing on non-Nvidia GPU.
  • Fixed audio distortion in the intro video of Warhammer 40,000: Dakka Squadron - Flyboyz Edition.
  • Fixed not being able to interact with the "confirm" button in Lucid Blocks.
  • Fixed Mirror's Edge Catalyst freezing on systems without Nvidia GPUs due to nvapi presence.
  • Fixed DIRT 5 crashing on CPUs with hybrid cores.
  • Fixed sprites not rendering in Zombie Estate 2.
  • Fixed Dark and Darker sometimes hanging on start.
  • Fixed Escape from Monkey Island crashing on some setups.
  • Enabled Xalia for Batman: Arkham City GOTY's settings window.
  • Fixed Dungeons & Dragons: Chronicles of Mystara not displaying available resolution correctly on some setups.
  • Fixed video playback in Psycho-Sleuth Demo.
  • Fixed audio issues in Portal 2 happening on 7.1 setups.
  • Fixed sound in Idle Iktah.
  • Fixed video playback in STAR WARS Starfighter.
  • Fixed saves not working in Hyperdevotion Noire: Goddess Black Heart
  • Fixed audio issues in DRAGON QUEST BUILDERS happening after device suspend.
  • Fixed RPGMaker Engine games freezing after being minimized inside of gamescope.
  • Fixed Moero Chronicle wrongly restarting the intro video every time the game loses focus during playback.
  • Fixed intro video playback in Legend of Mana.
  • Fixed visual distortions in pre-rendered backgrounds in Resident Evil 0 HD Remaster.
  • Fixed War Thunder occasionally crashing when selecting "To Battle!".
  • Updated Wine Mono to 11.2.0.
  • Updated to FEX-2607.
  • Updated vkd3d-proton to v3.0a-252-g212991fc2c26 from proton-11 support branch.
  • Updated dxvk to v2.7.1-498-ga6764047e587 from proton-11 support branch.
  • Updated vkd3d to 2.0
  • Updated dxvk-nvapi to v0.9.2
HHoff16 2026-08-23 github

@ivyl I believe that I found an issue that did not occur on 11.0-1 that does on 11.0-2. Sniper Elite V2 has an Alt+Tab issue where the game loses input via mouse/keyboard after resuming from an Alt+Tab.

This issue was obfuscated because previously the game didn't launch at all on stable until we saw this commit:

https://github.com/ValveSoftware/wine/commit/91e9e8

And started adding WINESTEAMNOEXEC=1 which allowed the game to get past the launcher step.

Aalasky17 2026-08-25 github

@Hoff16 Thank you for the report! We've pushed a fix to experimental-bleeding-edge for now. If you get a chance, could you try the "bleeding-edge" build of Proton - Experimental and confirm if that fixes this regression for you?

HHoff16 2026-08-25 github

@Hoff16 Thank you for the report! We've pushed a fix to experimental-bleeding-edge for now. If you get a chance, could you try the "bleeding-edge" build of Proton - Experimental and confirm if that fixes this regression for you?

@alasky17 Amazing! Alt+Tab issue is gone as well as the previous issues with CEG causing the game to fail to start and cause the 30-second delay.

I think we are at feature-parity with Windows now (on Bleeding Edge) ! Thank you!!

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