Arknights Endfield ACE Anti-Cheat failing on GE-Proton but runs completely fine on DW-proton.

[Cybertiger24]

Arknights Endfield stopped working properly after it's new update at the end of January. I didn't face any Anti-cheat issues before and worked fine like normal (although I was facing a severe issue with it's interface as it would crash the game but I didn't know where to report it exactly). All of a sudden, after installing the new update, the Anti-cheat would just fail to work no matter what I did, such as verifying game integrity or deleting my prefix to start a fresh one.

lutris-log.txt

By checking the Lutris logs live and repeatedly opened game, this message was persistent whenever the Anti-Cheat failed:

"wine: Call from 00006FFFFFC0D1F7 to unimplemented function msimg32.dll.AlphaBlend, aborting"

I didn't know what to do afterwards, so I thought issuing here might help me somewhere.

Compatibility Report

• Name of the game with compatibility issues: Arknights: Endfield
• Steam AppID of the game: Non-Steam game

System Information

• GPU: Nvidia Geforce RTX 2050
• Driver/LLVM version: Nvidia Drivers ver. 590.48.01-r1
• Kernel version: cachyos-kernel-6.18.7
• Proton version: GE-Proton-10-29
• OS: Gentoo Linux

I confirm:

• [ X] that I have verified my problem does NOT happen on proton-experimental and ONLY happens on GE-Proton
• This game refuses to open on proton-experimental and used to work on GE-Proton until the game's new update.
• [ yes] that I am NOT using the GE-Proton flatpak. (I do not build or provide the GE-Proton flatpak and it is known to have broken codec support.)
• [ yes] that I haven't found an existing compatibility report for this game.
• [ yes] that I have checked whether there are updates for my system available.

Symptoms:

"wine: Call from 00006FFFFFC0D1F7 to unimplemented function msimg32.dll.AlphaBlend, aborting"

Reproduction

Just install the game with it's launcher, and run it.

Note:

The game comes with it's own set of api-ms-win-core files, api-ms-win-crt files, libcurl, libssl, nghttp2, sdl2, qt5 libraries, and zlib. It also has two ways to render the game: Native Vulkan (default) or Directx 11 (not default and is for compatibility).

[GloriousEggroll]

I cant do anything about anticheat. if it doesnt work on older versions of ge-proton then its confirmed broken anti-cheat.

[Cybertiger24]

That's sad, the game actually worked before. In fact, updating to the newer ge-proton gave me a more stable fps. It's just that the new update for this game pretty much broke the anti-cheat functionality. I am still trying to find a fix, I have heard that the game runs fine in dw-proton on a reddit article somewhere so I will try that.

[Cybertiger24]

UPDATE

The game runs on dw-proton without the Anti-Cheat failing, apparently this fork of proton has patches for Anti-Cheats to ensure they work successfully. Should I mark this as solved?

[Novantric]

Perhaps the patches could be pulled into GE?

[Cybertiger24]

One could try, I honestly don't know what are the patches that make anti-cheats work.

[Novantric]

Might be worth checking if DW implemented it under Protonfixes, I'd do it myself but I'm not a dev. But whatever they've done, I've never had any issues at all.

[Cybertiger24]

Sadly, these patches are applied to their own fork of proton-cachyos. Maybe they can be applied here too?

EDIT:

They actually have a separate patches folder that has wine specific patches, checking them contains wine hacks patches and ntoskernel patches of QOL or fixes. I think we could use all of them.

https://dawn.wine/dawn-winery/dwproton/src/branch/main/patches/wine

[loathingKernel]

Or, you know, use dwproton for gatcha games since they are not only maintaining but also making the fixes first. That's the fastest way to get have them applied.

[Cybertiger24]

I guess so, I wonder if these patches could work with other anti-cheats whose games aren't gacha related, maybe those games that have severe anti-cheat issues could work?

[loathingKernel]

Maybe, but I also know that certain patches have broken other anti-cheats and anti-tampers in the past, and it was a whole thing to figure out and fix it.

[Cybertiger24]

I guess I should close the issue then?

[loathingKernel]

I don't think so, and that's not up to me say anyway, I am just adding information to the conversation.

[Cybertiger24]

Ah I see, well I am pretty new to GitHub so I wanted to know whether this issue can be closed or not.

EDIT

I am gonna close this issue, because I think there is no point in continuing it further, but these patches may be useful to ge-proton for other games but only testing them would provide any info.

[GloriousEggroll]

looks like its just 4 misc patches imported from upstream wine:

https://dawn.wine/dawn-winery/dwproton/commit/b816be489049a10453b470c6a12dcf552ea41773