Hello @Somamint, looking at your log, it looks like the Intel GPU is getting used, even though you've configured the system to use nVidia's prime render offload. I suspect that you're seeing the same issue as https://github.com/ValveSoftware/steam-runtime/issues/312. Can you give the workaround in https://github.com/ValveSoftware/steam-runtime/issues/312#issuecomment-739441559 a try?
Ok wow that worked!
Glad to hear it helped. Let's treat this as a duplicate of https://github.com/ValveSoftware/steam-runtime/issues/312. Closing.
Compatibility Report
System Information
I confirm:
Log: https://paste.ubuntu.com/p/ktNPVSxcsN/
Symptoms
Every game i want to start with Proton 5.13.5 will freeze in the first seconds and then crash.
Reproduction