protonscr

Mewgenics

protonclosed appid 686060Game compatibility - Unofficial
ValveSoftware/Proton#9487 · opened 2026-02-12 by ruanrothmann · updated 2026-02-23 · 4 comments · github · game page · search this game
Rruanrothmann 2026-02-12 github

Compatibility Report

  • Name of the game with compatibility issues: Mewgenics
  • Steam AppID of the game:686060

System Information

  • GPU: NVIDIA GeForce RTX 4080 Laptop GPU
  • Video driver version: Driver Version: 580.126.09 CUDA Version: 13.0
  • Kernel version: 6.17.0-14-generic
  • Link to full system information report as Gist: https://gist.github.com/ruanrothmann/565705a97d1683f49db6752cefe74a53
  • Proton version: Tested with Proton 7.0, Proton 9.0 (Beta), Proton 10.0, Proton Experimental, Proton Hotfix, and GE-Proton. Issue reproduces on all versions.

I confirm:

  • [ x ] that I haven't found an existing compatibility report for this game.
  • [ x ] that I have checked whether there are updates for my system available.

steam-686060.log

Symptoms

Game doesn't render - my desktop gets warped (i.e. whatever was rendering moves up and to the left) - but no game graphics render. The mouse cursor renders and tracks correctly, Audio plays normally, Menus are interactive — hovering over menu items changes the cursor from arrow to hand, and clicks register in the correct positions
The only thing missing is the actual rendered frame content

The game renders correctly under Xfce4 (xfwm4) on the same machine with no launch option changes, confirming the issue is specific to the Muffin compositor.

This appears to be an interaction between Wine's OpenGL presentation and the Muffin compositor specifically. Other Proton games on this system work without issue, suggesting the problem is specific to how this engine's OpenGL framebuffer
is composited by Muffin.

(ps love your work, thanks so much for everything you are doing)

Ssimifor 2026-02-12 github

@ruanrothmann Something that might be worth trying is changing the launch parameter to the following: __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia %command%

On my nvidia laptop, opengl games default to my amd igpu when not specifying that, it may be the case for you too and causing extra issues. Having said that, if your issue only happens with a specific DE it might be worth reporting the issue on their end too.

Rruanrothmann 2026-02-18 github

Issue is resolved after updating to Mint 22.3, big oversight on my part to not have done that particular update before logging, apologies.

Oolt4r 2026-02-21 github

I'm running Mint 22.3 with:

  • GPU: NVIDIA GeForce RTX 5070 Laptop GPU
  • Driver: 590.48.01, CUDA: 13.1
  • Cinnamon: 6.6.7+zena
  • Kernel: 6.17.0-14-generic
  • Proton version tested: 10.0-4, 9.0-4, Hotfix, Experimental

Simply running this configuration didn't help, and the symptoms were exactly like what OP reported.

What finally worked as a workaround was running Mewgenics via gamescope - Steam client version from official repositories doesn't include it, so I just installed it from a PPA:

sudo add-apt-repository ppa:3v1n0/gamescope
sudo apt update
sudo apt install vulkan-tools gamescope

Run the following to verify:

gamescope -- vkcube

Then, in Steam Library, right-click on Mewgenics entry, select Properties, go to General tab, and use the following command line in LAUNCH OPTIONS:

gamescope -f -- %command%

Intro plays correctly, although system cursor is displayed instead of in-game one if you don't move the mouse around - this seems to fix itself at the start screen. I can interact with all menus and options successfully - haven't checked the gameplay yet, will confirm as soon as I have some free time if everything runs OK.

I wasn't able to diagnose the core issue, but if I had to take a guess I'd say there's likely a problem with newer Cinnamon version, since this is a single component I did upgrade since original system install. Downgrading NVIDIA driver wouldn't change anything, and rendering works correctly via gamescope which would point to desktop / composer issues...

Hope this helps someone looking for a workaround 🙂

Rruanrothmann 2026-02-23 github

Not going to reopen for this cause it seems like such a niche issue but:

Turns out the update to 22.3 was not what fixed it. Instead, what fixed it, is launching Mewgenics directly from the Application (start) menu. If I launch it from my Steam library, it does not work. After launching it once from the application menu, I can subsequently launch it from my library and it'll work fine, until I restart. Sounds silly but this is 100% replicable for me.

Proton versions

Launch lines