Linux Steam Play/Proton: DX12 is not supported on your system

[Rico]

I have played several hours of this game thus far, and it has worked fairly well (very laggy on the first run, but closing out and restarting the game fixed this - also, autoset graphics must not work on Linux). However, today I chose to connect a new 1440p monitor to my laptop (Nvidia RTX3060), which caused the following error to appear:

DX12 is not supported on your system. Try running without the -dx12 or -d3d12 command line argument.

The game obviously refused to launch. Not sure why connecting an external monitor to run the game on makes a difference. Very strange.

[königplatzen]

That sounds weird. How do other games work? Does the X-Server (if not using wayland) uses the nvidia drivers?

Maybe also have a look on protondb in the PC section.
https://www.protondb.com/app/1501750

[TimLovesTech]

What version of Proton/Nvidia drivers are you running? I use have a 1440p monitor and a 3060Ti and I'm running the latest 545.29.06 Nvidia drivers and Proton Experimental without issue. After an update I sometimes see it lag and have to load in, close steam, and reopen again but then everything runs fine. If latest driver and/or Proton Experimental doesn't do it I would try the latest Proton-GE release.

*Edit* - Also update Flatpak if you are running Steam that way (flatpak update).

[Aldroen]

Try the following launch options

VKD3D_CONFIG=dxr VKD3D_FEATURE_LEVEL=12_2 VKD3D_SHADER_MODEL=6_6 %command%

Worked for me on AMD though it could be different on Nvidia. The game did not have those issue on launch but it occurred for me after some update.

[Arc]

AgilitySDK is supported since vkd3d-proton 2.9, which was implemented in Proton 8.0-3 and you need the correct GPU driver as well.

On AMD's side for example, the Vulkan driver won't work so i wonder if Nvidia has similar driver shenanigans.