The issue also happens on Valve’s Proton (which stops me from creating a bug on github), but this is a video codec issue, and to my understanding proton-cachyos has more codecs than Valve’s.
Game name: Street Fighter 6™ Demo
Steam AppID: 2154900
Proton-CachyOS version: proton-cachyos-11.0-20260506 (steam linux runtime)
GPU: NVIDIA GeForce GTX 1650
Video driver version: 595.71.05
Kernel version: 7.0.9-1-cachyos (64-bit)
Full system information report: My notebook specifications 2026-05-19 · GitHub
Symptoms: A weird VHS Tape rainbow video error, but the sound plays perfectly fine.
Steps to reproduce: Launch the game via Steam with Proton-CachyOS on WineWayland.
Log from Proton-CachyOS-SLR: https://drive.google.com/file/d/1aACONyVpumv7aVK1XnI_TFihwWp0qD5C/view
Log from recent Proton Experimental: https://drive.google.com/file/d/1YpMnYzUhABqFzJI0as6KbUeSssvLdZxX/view