I have recently switched to arch linux on my desktop as well. It has an AMD 5800x3d and an NVIDIA RTX 4060 that I used to play alan wake 2 on when it had windows installed on it running with 80 fps with DLSS. Now it runs at 10-20 fps without letting me turn on DLSS.
Steps to reconstruct: - I have installed: d3dcompiler_43 and d3dcompiler_47 in winetricks - Inside the heroic launcher after alan wake 2 was installed, in the game settings i have installed VC_redist.x64.exe and VC_redist.x86.exe - Added these environment variables: PROTON_ENABLE_NVAPI=1, VKD3D_CONFIG=dxr - Added: -dxr12 in Game Arguments (To run after the command)
Please help me out the game is unplayable in it's current state