dlssg-open Proton

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Small KDE tool that copies an installed Proton build and installs dlssg-open into the copy. This gets DLSS Frame Generation running on RTX 30 cards (Ampere) on Linux. The original Proton build stays untouched; Steam lists the copy as a separate compatibility tool, e.g. "GE-Proton11-11 (dlssg-open v0.1.1)". So only the games you switch to the copy get the mod.

Currently uses the fork ProfessorTee/dlssg-open, release 0.1.1: upstream dlssg-open 0.1.0 plus the CUDA module API (CreateCuModule / CreateCuFunction / LaunchCuKernelChain) that dlssg_for_sm86 0.4.x needs. Upstream PR: dniminenn/dlssg-open#1. The tool switches back to upstream once that is released.

Usage

1. Open Create dlssg-open Proton from the start menu (or run dlssg-open-proton in a terminal) and choose Create a Proton copy with dlssg-open.

2. Pick the Proton build that should get the mod.

3. Restart Steam, then select the new build in the game under Properties → Compatibility.

4. Add to the game's launch options:

   DXVK_NVAPI_GPU_ARCH=AD100 NVCUDA_LITE_CC=8.9 DXVK_NVAPI_CUBIN_RETARGET_SM=86 %command%
   

   With dlssg_for_sm86 (the sdli1995 mod: version.dll, dlssg_sm86.ini and dlssg_sm86\ in the game folder) use this instead, without the architecture spoof (the mod handles that, and gets 3X / 4X):

   NVCUDA_LITE_CC=8.6 DXVK_NVAPI_CUBIN_RETARGET_SM=86 PROTON_ENABLE_NVAPI=1 %command%
   

   If the game already has its own version.dll, add WINEDLLOVERRIDES="version=n,b" or use one of the mod's alternatives\ proxies.

   Do not set PROTON_NVIDIA_LIBS or PROTON_NVIDIA_NVCUDA, otherwise the real nvcuda is loaded instead of nvcuda-lite.

Right-click the start menu entry → Open Proton folder opens compatibilitytools.d so you can delete old copies. The interface follows the system language: German on German systems, English otherwise.

dlssg_for_sm86 into a game

The second menu entry (also right-click the start menu entry → Install / update dlssg_for_sm86 in a game, or dlssg-open-proton --game) puts the newest dlssg_for_sm86 release next to a game's EXE, or updates it there:

• Lists the installed Steam games that ship DLSS Frame Generation and finds their main EXE; Other EXE … or Choose an EXE myself … opens a file dialog, so non-Steam games work too.
• Downloads the release once (checked against GitHub's SHA-256), keeps it in ~/.cache/dlssg-open/.
• Copies the proxy, dlssg_sm86.ini and dlssg_sm86\ next to the EXE. The proxy is version.dll; if another mod already uses that name, the next free one of winmm.dll, dbghelp.dll, dinput8.dll (the order the mod's alternatives\README.md gives). Only one proxy of the mod stays in the folder.
• Update: old proxies of the mod are removed, the old INI is kept as dlssg_sm86.ini.bak (redo your edits in the new one). If the mod is loaded as an ASI plugin (e.g. 00_dlssg_sm86.asi next to an ASI loader), that file is updated in place.
• Shows the launch options to use, including the WINEDLLOVERRIDES for the chosen proxy.

What the tool does

• Lists every installed Proton build with dxvk-nvapi (Steam's Proton, system-wide ones and your own in compatibilitytools.d), excluding its own dlssg-open copies.
• Downloads the newest release of dlssg-open via the GitHub API, checks its SHA256SUMS and keeps it in ~/.cache/dlssg-open/<tag>.
• Copies the chosen Proton build to compatibilitytools.d/<name>-dlssg-open-<tag> (with --reflink, so on btrfs it takes almost no space), writes its own compatibilitytool.vdf and puts dlssg-open's nvapi64.dll and nvcuda.dll into the copy (Proton's originals stay next to them as .proton-orig / .proton-stub, the same as dlssg-open's install.py --proton does). If that fails, the copy is deleted again.

When a new dlssg-open or Proton release comes out, just run the tool again.

Requirements

• Steam (native, ~/.local/share/Steam), KDE (kdialog), curl, tar, sha256sum; no Python (since 2.0 the tool is a single Rust binary)
• RTX 30 and a game with DLSS-G runtime 310.x – details and limits in the dlssg-open README
• dlssg_for_sm86 0.4.x needs dlssg-open 0.1.1 (the fork above); with 0.1.0 frame generation fails or runs NVIDIA's stock kernels instead of the mod's. Tested: 0.4.1 in Monster Hunter Wilds and Crimson Desert, RTX 3090, 4X.

Installation

git clone https://github.com/ProfessorTee/dlssg-open-proton.git
cd dlssg-open-proton
./install.sh

install.sh builds the tool when Rust (cargo) is installed, otherwise it downloads the prebuilt binary of the latest release (x86_64, glibc ≥ 2.35).

Uninstall: delete ~/.local/bin/dlssg-open-proton and ~/.local/share/applications/dlssg-open-proton.desktop.

License

MIT. dlssg-open itself is a separate project by dniminenn (also MIT); the tool downloads it from the GitHub releases of the fork at runtime, it is not distributed with this repo.