Proton 9.0-2 has a Release Candidate ready for testing on Linux PC and Steam Deck

Valve stealthily put out a Release Candidate for testing the next stable update to Proton for Linux PCs and Steam Deck with Proton 9.0-2. They actually put this up last week on May 24th.

Posted up on the official Proton GitHub, Proton 9.0-2 Release Candidate includes various changes previously in Proton Hotfix and Proton Experimental. Valve are looking for feedback on any issues that happen that were not present in Proton 9.0-1.

Here's the current changes:

• Now playable:
  • Alpha League
  • Battlezone Gold Edition in VR mode
  • Black Desert Online
  • FreestyleFootball R
  • Helldivers 2
  • Hero's Land
  • Iragon
  • Senua's Saga: Hellblade II
  • SimCity 3000 Unlimited
  • Warlords Battlecry III
• Enabled controller support via Xalia in the launchers of:
  • Clustertruck
  • Fallout 3 (standard and GOTY edition) - partial support only
  • Fallout 4
  • Mugsters
  • The Elder Scrolls V: Skyrim (72850)
  • The Elder Scrolls V: Skyrim Special Edition
  • Tomb Raider: Anniversary
  • Tomb Raider: Legend
• Limited number of cores seen by the following games making them playable on a high core count CPUs:
  • Call of Juarez: Gunslinger
  • Command & Conquer and The Covert Operations
• Fixed Ghost of Tsushima and Horizon Forbidden West displaying a warning about outdated drivers with Nvidia GPUs.
• Fixed The Finals crashing on launch after a recent game update.
• Fixed The Finals wrongly detecting button mashing.
• Fixed The Finals not working on machines supporting AVX512 without clearcpuid=304 in the kernel command line.
• Fixed Apex Legends not starting after a recent game update.
• Fixed Tekken 8 reporting wrong connection type if both WiFi and Ethernet are present.
• Fixed Ubisoft Launcher not starting games with a fresh Proton prefix.
• Fixed Halo Infinite crashing randomly during "initializing data".
• Fixed Beat Saber not being playable on Nvidia GPUs without using the legacy branch.
• Fixed Marvel vs Capcom: Infinite crashing when creating multiplayer lobby.
• Fixed hosting multiplayer games in Foundry.
• Fix rendering of Japanese characters in the launcher of Granado Espada Japan.
• Fixed Nightingale not being able to authenticate with Steam on desktop.
• Fixed Bloons Monkey City thinking it's offline with IPv6 support disabled.
• Fixed Ubisoft Launcher asking for serial number on the first launch of Tom Clancy's Ghost Recon: Future Soldier.
• Fixed Descent 3 not working in GL mode.
• Fixed Shatterline freezing on loading screen when trying to join a second online match in a session.
• Fixed Age of Empires II: Definitive Edition crashing when skipping intro videos.
• Fixed Imperiums: Greek Wars launcher.
• Fixed Call of Juarez: Bound in Blood failing to launch on a fresh prefix.
• Fixed audio stutter in Viking: Battle for Asgard.
• Fixed Swords of Legends Online launcher not being displayed correctly.
• Fixed Russian language rendering in Brothers: A Tale of Two Sons launcher.
• Fixed scaling in The Desolate Hope when playing on desktop.
• Improved controller input support for Tower Princess.
• Improved performance in We Love Katamari REROLL+ Royal Reverie.
• Fixed GRIS showing error window when exiting the game.
• Fixed issues with transparency in Akka Arrh.
• Fixed load / save dialogs not working in Idle Spiral on Steam Deck.
• Added raw HID support for VKB Gunfighter SCG.
• Fixed random crashes in Cosmoteer Starship Architect & Commander.
• Fixed font rendering in Cosmoteer Starship Architect & Commander on Steam Deck.
• Improved Chinese font rendering in Cosmoteer Starship Architect & Commander.
• Fixed Russian and Hebrew font rendering in Simon the Sorcerer: 25th Anniversary Edition.
• Improved font rendering in Alien Swarm: Reactive Drop on Steam Deck.
• Updated support for OpenXR to version 1.1.36.
• Updated OpenVR support to v2.2.3.
• Updated vkd3d-proton to v2.12-58-gf6d39052afb1.
• Updated dxvk to v2.3.1-64-g889802887fa5.
• Updated dxvk-nvapi to v0.7.0-7-gaae4902b6ff7.
• Updated Wine Mono to version 9.1.0.

Pictured - Black Desert

Currently the post on GitHub has no replies, so I imagine most people missed the Release Candidate as well. So now you've got a weekend of testing ahead of you.

How to test?

Look for Proton 9.0 in your Steam Library, go into the Properties -> Betas and select release-candidate from the drop-down box.