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Ready for a long weekend testing out the latest Steam Play Proton compatibility layer? Good news! Valve announced the release of Proton 6.3-1 along with a Proton Experimental update.

This is a big release as it rebases Proton from Wine 5.13 to 6.3 which comes with thousands of changes! That does include a lot of new Windows games that Valve say are confirmed playable on Linux including:

  • Divinity: Original Sin 2
  • Shenmue I & II
  • Mass Effect 3 N7 Digital Deluxe Edition (2012)
  • Tom Clancy's Rainbow Six Lockdown
  • XCOM: Chimera Squad
  • Bioshock 2 Remastered
  • Company of Heroes 2
  • logiCally
  • Rise of the Triad
  • Home Behind 2
  • Shadow Empire
  • Arena Wars 2
  • King Arthur: Knight's Tale
  • Rise of Venice
  • ARK Park
  • Gravity Sketch
  • Battle Arena VR

On top of all that it also updates DXVK (D3D9, D3D10 and D3D11 to Vulkan) to version 1.8.1, it upgrades VKD3D-Proton (D3D12 to Vulkan) to version 2.2, FAudio was bumped up to 21.03.05 and also Wine-Mono to 6.1.1.

A bunch of what was previously in the separate Proton Experimental was pulled into Proton 6.3 including: improvements for non-US keyboard layouts, improved video support, support for setting thread priorities via RTKit (or Unix priorities if your user has permissions), controller layout and hotplugging improvements in Slay the Spire and Hades, improved PlayStation 5 controller support and also improvements to Virtual Reality startup time and compatibility.

Further to that there's also improvements to Uplay sign-in, G29 steering support in Assetto Corsa Competizione, fixes for Microsoft Flight Simulator in VR mode, fixes for cutscenes in Bioshock 2 Remastered and also an overhauled build system to greatly reduce build times.

You will also find a new updates to Proton Experimental too including:

  • All changes from Proton 6.3-1.
  • Performance improvements around input, windowing, and memory allocation.
  • Added support for Vulkan child window rendering.
  • Better support Anno 1404 - History Edition.
  • Updated file distribution method to save disk space.

Full changelog here.


Update - 07/04/21: Proton 6.3-2 is out now fixing "stuttering mouse cursor issue during longer play sessions".

Article taken from GamingOnLinux.com.
Tags: Proton, Misc, Steam, Wine
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22 comments
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STiAT Apr 1, 2021
Divinity: Original Sin 2

No, I did not read that. It's not there.

Oh damn, weekend wasted.
Corben Apr 1, 2021
Interesting to see Bioshock 2 Remastered on the list. I just completed it with Proton 5.13-6, I've just disabled esync, and it was running pretty solid. During my ca 20 hour play through (incl. the DLC), I had like 3 crashes.

Oh, and if it crashes, and even created a core file in the binary's path, make sure to delete the core file, as the game won't start otherwise anymore. Same is true for Bioshock 1 or even the Borderlands games, so it seems to be a 2K thing. It even won't start on Windows anymore if a core file is present, but Windows normally doesn't create a core dump on a crash :D
So it might side-load something on start from a core file.
dorron Apr 2, 2021
Great! Took them a long time to release a new one...
rustybroomhandle Apr 2, 2021
Great! Took them a long time to release a new one...

15 Feb - that's just a month-and-a-half. And I thought I was impatient. :)
Beamboom Apr 2, 2021
Divinity 2!!🎉 Oh yay, finally! ❤️
dorron Apr 2, 2021
Great! Took them a long time to release a new one...

15 Feb - that's just a month-and-a-half. And I thought I was impatient. :)

My bad. I meant moving from wine 5 to 6 ...
Nanobang Apr 2, 2021
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Interesting to see Bioshock 2 Remastered on the list. I just completed it with Proton 5.13-6, I've just disabled esync, and it was running pretty solid. During my ca 20 hour play through (incl. the DLC), I had like 3 crashes.

Oh, and if it crashes, and even created a core file in the binary's path, make sure to delete the core file, as the game won't start otherwise anymore. Same is true for Bioshock 1 or even the Borderlands games, so it seems to be a 2K thing. It even won't start on Windows anymore if a core file is present, but Windows normally doesn't create a core dump on a crash :D
So it might side-load something on start from a core file.

Hey Corben, thanks for the heads up. How would I go about finding this core dump file if I needed to?


Last edited by Nanobang on 2 April 2021 at 12:33 pm UTC
ColdPie Apr 2, 2021
Great! Took them a long time to release a new one...

15 Feb - that's just a month-and-a-half. And I thought I was impatient. :)

My bad. I meant moving from wine 5 to 6 ...

What was there in newer Wine that you were waiting for? Most stuff that is important for gaming gets backported.
robredz Apr 2, 2021
Lets see if it fixes Postal 4 that became dodgy with the latest update March 1st, as it fell over with the Epic C++ Runtime error, earlier version fine & dandy.
dorron Apr 2, 2021
Great! Took them a long time to release a new one...

15 Feb - that's just a month-and-a-half. And I thought I was impatient. :)

My bad. I meant moving from wine 5 to 6 ...

What was there in newer Wine that you were waiting for? Most stuff that is important for gaming gets backported.

I was stuck in Skyrim Dragonborn with a glitch. With the new Proton based on Wine 6.3 now it works and i can progress...
Corben Apr 2, 2021
Hey Corben, thanks for the heads up. How would I go about finding this core dump file if I needed to?
For Bioshock 1 Remastered I had a core file below: <your steam game library path>/steamapps/common/BioShock Remastered/Build/Final/core
So directly where the Bioshock.exe file was.

I guess it's a similar path for Bioshock 2 Remastered.


Last edited by Corben on 2 April 2021 at 6:57 pm UTC
Philadelphus Apr 3, 2021
XCOM: Chimera Squad was working perfectly (for me at least) when it released a year ago, but I'm glad to see it's now "officially" working.
ELEX running Out of The box..
!link
kibasnowpaw Apr 3, 2021
Bioshock 2 Remastered?? Does that game not already work? I know it's been a while I played it think it was back at proton 4, but I know I played both games on Linux, so I'm kind of surprise to see it on the list unless it broke and got a fix or it runs 100% better on proton 6.
GOTHIC Playable Teaser is not that playable..
!link

Very poor performance..
!link
ugly Apr 3, 2021
With the update to DXVK, with Proton 6.3-1, Mega Man Legacy Collection 2 is finally playable. Mega Man 8 in the collection has a video cutscene that shows the test pattern, but doesn't break the game. 7, 9 and 10 seem to work fine.
ljrk Apr 5, 2021
I wonder how well one could switch over from dxvk to the wined3d vulkan backend. The doc of Proton still mentions `PROTON_USE_WINED3D` to

> Use OpenGL-based wined3d instead of Vulkan-based DXVK for d3d11, d3d10, and d3d9.

But with wine6.0 this can actually be a Vulkan backend as well. Idk how to enable it (if necessary).
BielFPs Apr 5, 2021
For those using this version be aware
Derheim Apr 5, 2021
Is it just me or does this release fixes the issue where trying to stream some games from pc to Steam Link would give no video on the screen on the steam link but audio ok?

This only happened to me while running games using proton, native games didn't have the issue. Also it only happened for games that opened any sort of window right before opening the actual game, say a non interactive non-in-game splash/launcher screen.

So glad I can use my steam link to stream from Linux again :D
Philadelphus Apr 6, 2021
Hmm, Age of Empires II: Definitive Edition is now freezing repeatably on the loading screen with 6.3, and every other version I've tried.
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