This is quite an exciting release for Steam Play, as Valve just put out a brand new release of Proton.
It moves the version of Wine used from 3.16 to 4.2 which includes a rather large set of improvements by itself, so it should have quite an interesting effect on what games are now playable. What's especially nice, is that Valve said 166 patches from Proton 3.16 "have been upstreamed or are no longer needed".
That wasn't all, DXVK also saw a version bump so it's now using 1.0.1 and FAudio too joined the party with it pulling in a newer build "19.03-13-gd07f69f".
There's a bunch of other improvements too like better mouse behaviour in certain games, with Resident Evil 2 and Devil May Cry 5 specifically mentioned. Networking fixes made it in for NBA 2K19 and NBA 2K18 as well.
Controller/Gamepad duplication in games that use SDL2 like RiME should also be fixed, which I am sure many will appreciate as decent gamepad support could be something to make or break Steam Play. Any small hassle that gets fixed, is welcome.
Proton's special fullscreen "hack" should also now work with "GDI-based games", there's better support for IVRInput for controller input in VR and more improvements and new features to the build system.
As always, you can find the changelog here.
Do note though, Valve developer Pierre-Loup Griffais said on Twitter that you will want to install it manually from Steam's "Tools" area. Griffais said "That process is supposed to be automated, but there is currently a bug with games that use another redistributable".
You can find that here, for those that don't know:
Quoting: GuestThat number is the Steam Application ID for Elite Dangerous. Protontricks wraps winetricks and determines wineprefix, wine executable etc on the Steam app ID. Its pretty cool (although I would have preferred if it was just a shell script like winetricks, but installation at least in Fedora was still very easy). See https://github.com/Matoking/protontricks
I was unable to get protontricks to work with Elite, BUT, following the link provided I could get it to work using the usual winetricks without needing a modified SteamPlay version (just used the default Proton 4.2 and winetricks).
https://github.com/redmcg/wine/wiki#the-official-build-of-proton-42-runs-ed
Comandante Ñoñardo Apr 1, 2019
The game in DX9 mode doesn't crash, but there are a lot of graphic glitches, like missing textures.
legluondunet Apr 1, 2019
Quoting: Comandante ÑoñardoThe Murdered: Soul Suspect freeze in cutscene "entering cementery" is present on PROTON 4.2-1 too...If it crashes in dx11 but not dx9, you should open a bug report on DXVK github page.
The game in DX9 mode doesn't crash, but there are a lot of graphic glitches, like missing textures.
Comandante Ñoñardo Apr 1, 2019
Quoting: legluondunetQuoting: Comandante ÑoñardoThe Murdered: Soul Suspect freeze in cutscene "entering cementery" is present on PROTON 4.2-1 too...If it crashes in dx11 but not dx9, you should open a bug report on DXVK github page.
The game in DX9 mode doesn't crash, but there are a lot of graphic glitches, like missing textures.
I tried with
PROTON_USE_WINED3D=1 and the game doesn't crash... But it looks horrible.. 
It seems both layers are broken.
Quoting: Comandante ÑoñardoQuoting: legluondunetQuoting: Comandante ÑoñardoThe Murdered: Soul Suspect freeze in cutscene "entering cementery" is present on PROTON 4.2-1 too...If it crashes in dx11 but not dx9, you should open a bug report on DXVK github page.
The game in DX9 mode doesn't crash, but there are a lot of graphic glitches, like missing textures.
I tried withPROTON_USE_WINED3D=1and the game doesn't crash... But it looks horrible..
It seems both layers are broken.
just skip back to DXVK after the cut scene
Comandante Ñoñardo Apr 2, 2019
Quoting: mylkaBut that is not a solution... And is the only thing that prevents the inclusion of this game in the whitelist.Quoting: Comandante ÑoñardoQuoting: legluondunetQuoting: Comandante ÑoñardoThe Murdered: Soul Suspect freeze in cutscene "entering cementery" is present on PROTON 4.2-1 too...If it crashes in dx11 but not dx9, you should open a bug report on DXVK github page.
The game in DX9 mode doesn't crash, but there are a lot of graphic glitches, like missing textures.
I tried withPROTON_USE_WINED3D=1and the game doesn't crash... But it looks horrible..
It seems both layers are broken.
just skip back to DXVK after the cut scene
There is one more thing that I have to try: Play the game on my other PC with a LEGIT Windows 7 SP1..
If the game crash there, then is a game issue, if not, is a PROTON or DXVK issue. That is how I discovered that the "Press space to continue" bug in Bioshock 2 Remastered is a WINE issue, and not a game issue.
Quoting: Comandante ÑoñardoQuoting: mylkaBut that is not a solution... And is the only thing that prevents the inclusion of this game in the whitelist.Quoting: Comandante ÑoñardoQuoting: legluondunetQuoting: Comandante ÑoñardoThe Murdered: Soul Suspect freeze in cutscene "entering cementery" is present on PROTON 4.2-1 too...If it crashes in dx11 but not dx9, you should open a bug report on DXVK github page.
The game in DX9 mode doesn't crash, but there are a lot of graphic glitches, like missing textures.
I tried withPROTON_USE_WINED3D=1and the game doesn't crash... But it looks horrible..
It seems both layers are broken.
just skip back to DXVK after the cut scene
but it is sth i can live with, because i bought it 90% off
if they fix it, its fine, but if they dont i wouldn't bother
Comandante Ñoñardo Apr 3, 2019
4.2-2:
Corrected command line parameters for some games, including Wadjet Eye games like Blackwell Epiphany.
Fixed some games failing or crashing in certain locales like Turkish.
Updated FAudio to 19.03-25-g8105923.
Fixed a crash when alt-tabbing out of Deus Ex.
Restored previous .NET installer functionality.
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