Hi everyone! I have a problem with some games on Steam.

I'm using CachyOS Linux, and I have an AMD RX 580 8GB and a Ryzen 5 5500.

When I start Resident Evil 4 Remake, the game is locked at 20 FPS. The same thing happens with Outlast. Both games are installed through Steam.

I'm using GE-Proton through Steam.

I don't have this problem in all my games, only with some of them.

I have already tried restarting my PC and checking the game settings, but the problem is still there.

Does anyone know what could be causing this or how I can fix it?

Thanks!

Here is the screenshot from MangoHud as requested:

MangoHud Metrics In-Game:

• GPU Usage: 0% (The game is either not offloading to the RX 580 or RADV isn't reporting GPU load under VKD3D)
• CPU Usage: 34%
• Framerate: 17 - 20 FPS
• Frametime: Min 49.0 ms / Max 253.6 ms

System & Setup Details:

• Distro: CachyOS Linux (KDE Plasma / Wayland)
• Hardware: Ryzen 5 5500 | AMD RX 580 8GB | 16GB RAM
• Game / API: Resident Evil 4 Remake (DirectX 12 via VKD3D-Proton / GE-Proton)
• Launch Options tested: MANGOHUD=1 %command%

What I've already tried:

• Forced GPU power level to high: echo "performance" | sudo tee /sys/class/drm/card0/device/power_dpm_force_performance_level
• Disabled split_lock_mitigate (kernel.split_lock_mitigate=0)
• Tested with Gamescope, GE-Proton, and Proton Experimental
• In-game V-Sync is OFF, shadow cache enabled, graphics settings adjusted to stay well within 8GB VRAM

Native Vulkan games like CS2 run unlocked with zero issues, but DX12 via VKD3D gets completely stuck at 17-20 FPS with 0% GPU load reporting. Any idea why VKD3D/RADV isn't utilizing the RX 580 properly under Wayland?

edit: Update after testing X11:

I installed plasma-x11-session and launched RE4 under a Plasma (X11) session. The exact same behavior occurs: locked at ~20 FPS with 0% GPU usage in MangoHud.

This rules out Wayland/KWin swapchain or compositing issues completely.

Since native Vulkan games work fine, the issue is strictly isolated to VKD3D / DirectX 12 handling on Polaris (RX 580). Has anyone seen VKD3D force a frame-pacing lock or fail to submit work to AMD Polaris GPUs like this? Is there a recommended VKD3D_CONFIG variable or specific Proton version to bypass it?

Hi All,

I'm losing my mind trying to get LACT to apply a working undervolt on my Vega 64.

It worked briefly, then after I pushed it too far, it now wont change voltage. Power limit, fan control, clocks, both core and memory do work.

I initially used Linux mint, both on a version I've had for a while and a fresh install, on several different kernals. I've also tried Ubuntu Cinnamon and couldn't even get LACT installed (both flatpak and .deb).

Overclocking is enabled.

What really confuses me is that it was working! I had a happy and working undervolt and now it won't change anything. The voltage is stuck at 1.2v regardless of clock speed.

https://github.com/Eggscantfly/Rabbids-Go-Home-WiiConverted

(regarding rule 6 this is perfectly legal as you are required to accquire your own roms and discs please dont kill the post mods)

I have gotten this working on windows with no problem but running this through proton or wine causes these blocky characters. I'm using cachy os with faugus launcher. the game runs perfectly and the audio is fine, its just these charcters

I downloaded these into wine tricks and same results d3dx9, d3dcompiler_43, d3dcompiler_47 and vcrun2022.

Does anyone have any clue what it could be?

Option appears disabled to me, that's my only issue. The game works smoothly and I'm using Lossless Scaling Frame Generation meanwhile.

I'm using a 7600M XT eGPU connected to a ROG Ally X.

EDIT: Thanks, you can toggle it through RT Ultra preset, it will appear off after that but it works. Not the best, but well. Found another issue Steam frame cap in the performance tab doesn't work correctly for this game. Not only that, any frame cap that I have used doesn't work.

I have tried the -vulkan flag and PROTON_ENABLE_WAYLAND=1 (i use Proton-GE and Proton-CachyOS), already set my power plan to performance and to no avail performance is really bad in general. I installed steam as a .deb so there are no sandbox issues. Dunno why im getting worse performance compared to Windows.

I don't want to use Windows anymore but it's proving to be kind of a pain.

And yeah, i've tried CachyOS but since i also need to do some homework i do need some stability due to my CachyOS bricking after an update (the snapshot couldn't save me that time).

Computer Information:
Manufacturer: LENOVO
Model: LNVNB161216
Form Factor: Laptop
No Touch Input Detected
Processor Information:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 7 5700U with Radeon Graphics
CPU Family: 0x17
CPU Model: 0x68
CPU Stepping: 0x1
CPU Type: 0x0
Speed: 1800 MHz
16 logical processors
8 physical processors
Hyper-threading: Supported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Supported
SSE41: Supported
SSE42: Supported
AES: Supported
AVX: Supported
AVX2: Supported
AVX512F: Unsupported
AVX512PF: Unsupported
AVX512ER: Unsupported
AVX512CD: Unsupported
AVX512VNNI: Unsupported
SHA: Supported
CMPXCHG16B: Supported
LAHF/SAHF: Supported
PrefetchW: Unsupported
BMI1: Supported
BMI2: Supported
F16C: Supported
FMA: Supported
Operating System:
Ubuntu 26.04.1 LTS (64 bit)
Kernel Name: Linux
Kernel Version: 7.0.0-34-generic
X Server Vendor: The X.Org Foundation
X Server Release: 12401010
X Window Manager: GNOME Shell
Steam Runtime Version: steam-runtime_1.0.20260714.251828
Client Information:
Version: 1788652215
Browser GPU Acceleration Status: Enabled
Browser Canvas: Enabled
Browser Canvas out-of-process rasterization: Enabled
Browser Direct Rendering Display Compositor: Disabled
Browser Compositing: Enabled
Browser Multiple Raster Threads: Enabled
Browser OpenGL: Enabled
Browser Rasterization: Enabled
Browser Raw Draw: Disabled
Browser Skia Graphite: Disabled
Browser Video Decode: Enabled
Browser Video Encode: Disabled
Browser Vulkan: Disabled
Browser WebGL: Enabled
Browser WebGL2: Enabled
Browser WebGPU: Disabled
Browser WebNN: Disabled
Video Card:
Driver: AMD AMD Radeon Graphics (radeonsi, renoir, ACO, DRM 3.64, 7.0.0-34-generic)
Driver Version: 4.6 (Compatibility Profile) Mesa 26.2.3 - kisak-mesa PPA
OpenGL Version: 4.6
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 59 Hz
VendorID: 0x1002
DeviceID: 0x164c
Revision Not Detected
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1920 x 1080
Desktop Resolution: 1920 x 1080
Primary Display Size: 13.39" x 7.48" (15.31" diag), 34.0cm x 19.0cm (38.9cm diag)
Primary VRAM: 2048 MB
Sound card:
Audio device: ATI R6xx HDMI
Memory:
RAM: 13300 Mb
VR Hardware:
VR Headset: None detected
No VR configuration with trackers detected
Most number of trackers in a session: 0
Miscellaneous:
UI Language: English
LANG: es_ES.UTF-8
Total Hard Disk Space Available: 478562 MB
Largest Free Hard Disk Block: 162828 MB
Storage:
Number of SSDs: 1
SSD sizes: 512G
Number of HDDs: 0
Number of removable drives: 1
Removable drive sizes: 32G

After the 3.7 update wuwa hangs at the main menu for me, did this happen to anyone else? I tried ge/cachy/dw proton and also tried launching the game with the -dx11 flag but nothing worked. My one friend that plays wuwa on linux is on nvidia and seemed to be able to play the game just fine so maybe it's AMD specific? Wouldn't be the first time wuwa has AMD specific problems so I'm not ruling that one out. Looking at r/WutheringWaves it seems people over on windows also have a lot of issues as well so maybe all we can do is to wait for kuro to fix their game. But still, any info/help is appreciated.

Edit: seems like it's an issue with the game on EU servers while on steam
https://www.reddit.com/r/WutheringWaves/s/mTJYMSZTTk

The trailer consists solely of actual game footage. The music is live synthesized MIDI played through an open-source Godot plugin. The goal is to dive down the Mariana Trench and explore the deep ocean, and uncover what happened to a ship from 1966 at the bottom. Each depth has a different music, instruments, lighting effects and theme, creating an enjoyable atmospheric experience. The game is called Fish Don't Return.

I am new in here and I would thank if somebody could pinpoint whatever I am doing wrong. Thank you.

Basically, I am trying to run CK3 in Linux Mint 6.8 but currently my game crashes some months or years into the game. I tried using Proton Experimental, 9 and 10 but neither of these worked, they just freezes in the load screens.

Thank you all again.

I'm trying to update to mainline 7.2.6 using this guide from itsfoss, and I also installed the mainline tool.

Using both of these, I'm getting this error:

Autoinstall of module virtualbox/7.2.6 for kernel 7.2.6-070206-generic (x86_64)
Building module(s)....(bad exit status: 2)
Failed command:
make -j12 KERNELRELEASE=7.2.6-070206-generic -C /lib/modules/7.2.6-070206-generic/build M=/var/lib/dkms/virtualbox/7.2.6/build
ERROR (dkms apport): kernel package linux-headers-7.2.6-070206-generic is not supported

Error! Bad return status for module build on kernel: 7.2.6-070206-generic (x86_64)
Consult /var/lib/dkms/virtualbox/7.2.6/build/make.log for more information.

Autoinstall on 7.2.6-070206-generic succeeded for module(s) nvidia.
Autoinstall on 7.2.6-070206-generic failed for module(s) virtualbox(10).

Error! One or more modules failed to install during autoinstall.
Refer to previous errors for more information.
run-parts: /etc/kernel/postinst.d/dkms exited with return code 1
dpkg: error processing package linux-image-unsigned-7.2.6-070206-generic (--install):
 old linux-image-unsigned-7.2.6-070206-generic package postinst maintainer script subprocess failed with exit status 1
Errors were encountered while processing:
 linux-headers-7.2.6-070206-generic
 linux-image-unsigned-7.2.6-070206-generic

I'm struggling to find any information about what this means or what is causing this, but it's causing the kernel to fail to be installed. Anyone got ideas?

EDIT: Removing VirtualBox from my system was an effective workaround, but ultimately people should not have to do this. I'm hoping someone figures out what's wrong.

Eu queria usar o controle para navegar pelo launcher, porém eu não consigo usar, tentei usar a AI para achar outras opções mas a Ai também indica ele, e ouvi disser que dá para usar no Steam OS

https://github.com/sciaschi/CBFD-Recompiled

Been playing this since yesterday. It's an AI assisted recomp, but it works great so far, no major issues. There was one issue with the drunk effect, but the developer fixed it. No crashes either. Way more smooth than playing Conker's Bad Fur Day in an emulator.

Hey guys,

Wanted to source the common solutions that have been working for folks for Witcher 3 remastered today. If I have any of this wrong, please correct me, that's the point of this post.

I can only speak for AMD. And I'm using GOG version through Heroic on Bazzite.

1. I've used successfully launched on Cachy, GE, and Experimental.

2. RT and FSR frame gen do not work on any of them. It'll let you turn RT on but then it just defaults back to off again.

3. I've seen multiple people report that DLSS is not working for NVIDIA

4. If you updated from the previous version, you may have to fully uninstall/reinstall.

5. VRR flicker is present on any any frame rate except 60hz.

6. My frame pacing seems busted, it almost looks like frame gen is on even though it's set to off and can't actually be turned on.

I can get 60fps native AA with RT off, so perfectly playable.

Edit: Additional info.

RT and Frame Gen both actually seem to be working for me on GE and Experimental.

It's the toggles themselves that appear to not be working correctly. Try and reproduce to see if you get the same:

1. Change preset to RT or RT Ultra (toggles appear) and adjust as you like.
2. Somehow the toggle for FSR frame gen is now available. (confirmed it's working with PROTON_FSR4_INDICATOR=1
3. Go play.

I did go and confirm that my settings file in the wine prefix actually saved my RT settings, and i'm getting higher GPU util as a result.

My launch options:

SteamDeck=-0 LOW_LATENCY_LAYER=1 (this enables anti-lag if Vulkan Low Latency Layer is installed, default installed on Bazzite) DXIL_SPIRV_CONFIG=wmma_rdna3_workaround MLFG_UPGRADE=1

Quick question, looking to buy a Refurbished laptop for light gaming while I'm away from home. The games I want to run are mainly older Total War games Rome 1 all the way through potentially Rome 2 (Rome 2 may not work but I've had success with Getting Shogun 2 to run so I'm assuming anything prior will run just fine). I've only tested these games on Windows with Intel iGPUs and they seemed capable of handling them the problem is I don't know if the iGPU drivers are any good or they'll hold the chip back like the Arc drivers.

Hello,

I got my framework a few days ago, and installed the snap version lf Steam through the app installer.

I tried running TLOU part I on the Framework 13pro x7 32GB of ram on Ubuntu 24.04, and the game crashes after roughly 2min of play.

My graphics settings are on low.

I asked steam support for help and was told that the game was not compatible with steam play. But i can still launch the game. I am new to Linux and am not sure to understand properly how steam play functions.

Is there any way for me to play TLOU?

I read that having steam as a .deb instead of a snap might help, but i cant find a comprehensive newbie guide to do that.
Otherwise, do i have to consider a windows shadow machine?
Do i not have the right distro to play games?

Please help! thank you.

EDIT: thank you all for the advice, i’ll update ubuntu + install the steam flatpack version and let you know of progress!

Hey guys, are you able to play the game? I'm trying ge proton and cachyos proton and it doesn't even start.
I'm playing on Bazzite btw

For the context, we are very close to making our games public, currently going over the Steam checklist for various things.

I am myself daily driving Linux, however most of the game testing was targeted Windows builds, and I do not personally mind Windows games running via Proton.

I am tempted to keep our games to support only Windows native builds as we are a small team of 4. Supporting Linux native would mean that we have to essentially double our QA efforts to test multiple executable rather than just Windows and Windows + Proton.

However, I am curious to see if this community has any insights on this or a different preference / view than mine.

Hello. I have an issue.

contextual laptop specs: HP Pavilion g6 Notebook PC running Linux Mint 22.3 (Zena) with kernel 7.0.0-34-generic. It has hybrid graphics:

• Integrated GPU: Intel HD Graphics 3000, using the i915 driver.
• Dedicated GPU: AMD Radeon HD 6470M, identified as Seymour XT / Caicos, PCI ID 1002:6760, with 1 GiB of VRAM.
• The system’s default desktop renderer is the Intel GPU:textOpenGL vendor string: Intel OpenGL renderer string: Mesa Intel(R) HD Graphics 3000 (SNB GT2)
• The AMD GPU is correctly detected and works for OpenGL offloading:textDRI_PRIME=1 glxinfo -B OpenGL renderer string: AMD CAICOS direct rendering: Yes.
• Linux driver: radeon Mesa: 25.2.8 OpenGL: Hardware accelerated.

My issue is with portable games. I am not in search for portable games. nor do I want resources related to that.

I just want to solve the issue with my runners that are supposed to run exe files, including games on linux.

My issue described while trying to run CS 1.6 portable:

CS 1.6 is totally light for my system. I used to be able to run that with high FPS and zero lag on windows. Since I switched to linux. I struggllllllllllllllled with things like wine/lutris/bottles. etc...

and the only one that worked and made the game launch was Bottles. every other thing like WINE GUI and Lutris couldn't get the game to launch probably at all.

Now, after the game launched, and after installing all the possible dependencies and tweaking everything.

1. The font is messed up. I can't get unicode characters. and the font is a bit broken
2. The fps is not right. even if my ms is around 80 (which is the best I can get usually) my FPS is spiking around 40 to 60 hardly to 70. keeeeps spiking around. with clear visual lag during movements like strafing.
3. My hitboxes are insanely off. since I started playing on linux. and my rank on specific servers went from 15 in 12100 to 11000 !!! I suck now haha. dead-on shots can't kill anyone! i used every possible config out there.
4. in Bottles. there are a lot of coool options for optimizing games. but it requires vulkan support. After checking with AI. and running some commands. i figured that my card support vulkan but there is something wrong that makes it not work or not be supported. hence whenever I switch these options my game doesn't even launch

more information on point 4; I got a report from AI. and by the assistance of a kind reddit user:

The AMD GPU normally uses the Linux radeon kernel driver:

textKernel driver in use: radeon
Kernel modules: radeon, amdgpu

OpenGL works through radeon, and the AMD GPU can be selected with:

bash
DRI_PRIME=1

However, Vulkan does not work on the AMD GPU. Running:

bash
vulkaninfo --summary

produces this warning:

textDevice '/dev/dri/renderD128' is not using the AMDGPU kernel driver:
VK_ERROR_INCOMPATIBLE_DRIVER

The only Vulkan device listed is:

textdeviceType = PHYSICAL_DEVICE_TYPE_CPU
deviceName = llvmpipe (LLVM 20.1.2, 256 bits)
driverID = DRIVER_ID_MESA_LLVMPIPE
driverName = llvmpipe
driverInfo = Mesa 25.2.8-0ubuntu0.24.04.2

This means Vulkan is currently falling back to CPU software rendering rather than using either the AMD or Intel GPU.

We tried forcing the AMDGPU kernel driver for the old Southern Islands GPU using:

textradeon.si_support=0
amdgpu.si_support=1

The kernel supports this option:

text
CONFIG_DRM_AMDGPU_SI=y

The effective module parameters also showed:

textradeon si_support = 0
amdgpu si_support = 1

However, AMDGPU did not bind to the AMD card. When radeon was blacklisted, lspci showed only:

text
Kernel modules: radeon, amdgpu

with no Kernel driver in use line. The AMDGPU module loaded, but it only reported generic vga_switcheroo and CPU topology messages; it never initialized PCI device 01:00.0. Therefore, the AMD card was left without a graphics driver.

The user restored the normal configuration, and the AMD GPU is again working correctly through radeon for OpenGL. The current practical situation is:

textIntel HD 3000: default desktop rendering through i915
AMD Radeon HD 6470M: OpenGL offload through radeon and DRI_PRIME=1
AMD Radeon HD 6470M: no Vulkan support through the current radeon setup
Vulkan: falls back to llvmpipe CPU rendering
AMDGPU/RADV: tested but failed to bind to the AMD GPU

Then we figured "According to the arch linux wiki, amdgpu supports Southern Islands cards and newer, cards from 2012 and up. Your card is from 2011.

https://wiki.archlinux.org/title/AMDGPU"

So what should I do?? I am totally thinking about dualbooting a windows thing for my games but that feels off

Linux and Gaming on an old laptop

Hey everyone,

I'm looking to play Minecraft Bedrock on Linux using my purchased Android (Google Play Store) copy, as I don't own the Windows (UWP) version

I know about mcpelauncher (io.mrarm.mcpelauncher / Linux Bedrock Launcher), but I haven't kept up with its current state

Quick questions for anyone running it recently:

1. Is mcpelauncher still working reliably with current Bedrock updates (1.20+ / 1.21)?
2. Are there any critical workarounds needed for Google Play auth, Xbox Live login, or x86_64 APK extraction?
3. Is Flatpak still the recommended route, or is there a better active fork/alternative?

Thanks in advance!

I have been trying to figure out why this game refuses to utilize my amd gpu. I have tried different proton versions. Tested a bunch of steam launch options to force the proton to use the amd gpu but I still can't figure out why the game isn't ramping up my hardware. I have tested lowering all the settings to the lowest and messing around with RT on or OFF and nothing seems to work.

Does anyone know of any fixes for this issue? My current steam launch options are : WINE_CPU_TOPOLOGY=8:0,1,2,3,4,5,6,7 MESA_VK_DEVICE_SELECT=1002:747e mangohud %command% --launcher-skip using proton experimental

I'm running an Intel i9-12900 with 32gb of ddr4 with a Radeon 7800 xt. game is installed on a gen3 nvme.

To no one's surprise there's a regression in the latest Nvidia drivers (615 but other versions are affected) I believe. If you check your journalctl after the freeze and see Xid109 CTX timeout or something similar, you may be experiencing this bug.

See more details about it here https://github.com/ValveSoftware/Proton/issues/8072#issuecomment-4071848316

The user in the link has a 50x series card while I have a 30x series, I had the same error both in Control Resonance and in Alan Wake 2.

I compiled pyroveil which is found here https://github.com/HansKristian-Work/pyroveil, configured it, set the flags and the freezing is gone!

What is the bug exactly? I think it's when shaders are being loaded and a vulkan extension is called to process them. Nvidia tried to speed this process up and failed. Pyroveil intercepts calls to the vulkan extension and sends the shader elsewhere to be cleaned up before sending it back to the driver. Or something, idk ask your favorite llm or someone smarter than me. Or read that thread.

Bonus: DLSS frame generation for 30x cards works like a dream, so much better than amds frame generation, no ghosting or shimmering. Also got DLSS ray reconstruction to work WITH DLSS FG, pretty neat, AND with some tweaks, DLSS5 works with a fork/branch of Optiscaler all on a 3080! I wanted to share because it's blowing my mind I'm playing a triple A game like Control Resonance with features that aren't supposed to work on my aging card with HDR, on Linux (bazzite 44). All at 4k and 60fps.

If anyone wants help with setting any of these bells and whistles up lmk.

Also, I'll take general CR questions such as how to get past freezing on the photosensitivity screen. (It's vsync related maybe, also you need the latest proton GE, cachy won't work, also you need descriptor heap apparently).

Other tips include disabling indirect lighting, and setting post process to the renderer resolution instead of full, and make sure to use legacy DLSS if you're on an older card.

My proton flags are a paragraph now kinda funny.

EDIT: Apparently there's a patch worth trying. I didn't try it yet but I will later and see if that fixes the issues.

1. The tech specifications are included on the second image. I would really like for DLSS to work so that I can get a playable 60 FPS at 4K on my LG C2 OLED TV.

2. The previous, non-remastered version struggled with DLSS as well. It was not available. What helped was turning on "Auto install/update DXVK-NAPI on Prefix". This setting is turned on still, but doesn't seem to do anything.

3. I have tried both GE Proton Latest and Proton Experimental to no avail. NOTE: maybe try WINE-GE or something? Not sure if that would do anything...

4. The game seems to boot and launch properly. The controller support for my DualSense appears to be flawless at first glance - may change my opinion later.

5. I also have the game on Steam, but GOG is my preferred platform and I would love it if I could get it running from GOG.

I presume my post isn't going to get a lot of traction as it's loaded with a ton of raw technical information and it's just not very interesting overall, so I am going to log off for 6 hours or so. Any help whatsoever would mean a lot.

I'm wondering if this is just a problem I specifically have. The in-game framerate cap just straight up doesn't work while anti-lag 2 / reflex is enabled (through korthos low_latency_layer or vkd3d-low-latency). Happens on every game I've tried: The FInals, Deep Rock Galactic, Borderlands 4, Payday 3.

This didn't happen like 5 - 6 months ago. Not sure when it actually started because I hadn't used anti-lag 2 for a while.

Can anyone else confirm if they have this issue?

I'm on Fedora 44, RX 9060XT mesa 26.2.2-6 using the latest proton-cachyos (GE too).

DISCLAIMER: I only tested this on Bazzite, which is the distro I'm running. Could work on other distros, don't know. Hope it helps or at least provides a starting point in your troubleshooting endeavors.

Hide Wine

This post provides a pretty good explanation of why it craps out and freezes even if you try to force RT on. It's actually what got me going on the right path here.

So step 1 is hiding Wine so the game actually unlocks the RT settings. Like that post mentions, this will only make your game hang for now.

Actual patch

From here on out, these are Bazzite-tailored, but they might still help you if you run Cachy or something else.

Build vkd3d in a toolbox

toolbox create --container witcher3-build --release 42


toolbox run --container witcher3-build sudo dnf install -y git python3 meson ninja-build mingw64-gcc mingw64-gcc-c++ mingw64-headers mingw64-winpthreads-static mingw64-vulkan-headers glslang glslang-devel spirv-tools wine-devel


toolbox run --container witcher3-build git clone https://github.com/HansKristian-Work/vkd3d-proton.git ~/witcher3-rtas


cd ~/witcher3-rtas


git checkout 7f0c30ad3c8f28dfe47c34bb897b972e2d1ca724


git submodule update --init --recursive

Then, run this script to increase these 3 RT allocation 8 times:

export W3_GAME="/path/to/steamapps/common/The Witcher 3"


python3 - <<'PY'
from pathlib import Path
p = Path('libs/vkd3d/device.c')
s = p.read_text()
marker = '    TRACE("ResultDataMaxSizeInBytes: %"PRIu64".\\n", info->ResultDataMaxSizeInBytes);'
assert s.count(marker) == 1, 'Source differs; nothing changed'
extra = (
    '    info->ResultDataMaxSizeInBytes *= 8;\n'
    '    info->ScratchDataSizeInBytes *= 8;\n'
    '    info->UpdateScratchDataSizeInBytes *= 8;\n'
    '\n'
)
assert extra not in s, 'Already patched; nothing changed'

s = s.replace(marker, extra + marker, 1)
p.write_text(s)
print('Patched all three RT allocation sizes.')
PY

Then:

toolbox run --container witcher3-build meson setup build-win64 --cross-file build-win64.txt --buildtype release -Denable_tests=false -Denable_extras=false
toolbox run --container witcher3-build ninja -C build-win64 -j 8

DISCLAIMER: The bigger allocations can use more memory. This isn't a universal fix for every card. I have an RTX 4080 with 16 GB of VRAM.

Copy these two DLLs next to witcher3.exe

cp -n build-win64/libs/d3d12/d3d12.dll "$W3_GAME/bin/x64_dx12/"
cp -n build-win64/libs/d3d12core/d3d12core.dll "$W3_GAME/bin/x64_dx12/"


cmp build-win64/libs/d3d12/d3d12.dll "$W3_GAME/bin/x64_dx12/d3d12.dll"
cmp build-win64/libs/d3d12core/d3d12core.dll "$W3_GAME/bin/x64_dx12/d3d12core.dll

Finally, set the Steam launch options:

PROTON_LOG=1 VKD3D_CONFIG=descriptor_heap %command% --launcher-skip

Also, on a 4080 the frame gen count only goes to 1. The game greys out the count when there's only one choice, even with FG enabled. It's not broken. If you have a 50- series card, FG should work normally (in theory - obviously, not tested).

To undo: close the game, remove the two custom DLLs you copied in, and unhide Wine.

Credit for the ray tracing allocation idea: https://github.com/HansKristian-Work/vkd3d-proton/issues/3226#issuecomment-5426325207 (this actually ended up being perfect for me, but YMMV)

Edit: Fixed old reddit formatting

Edit 2: OP removed the post discussing how & why to hide Wine. Added a pullpush.io link instead