Forza Horizon 5 (1551360)

Compatibility Report

• Name of the game with compatibility issues: Forza Horizon 5
• Steam AppID of the game: 1551360

System Information

• GPU: Nvidia RTX 3070 (laptop)
• Driver/LLVM version: Nvidia 495.44
• Kernel version: 5.14.16
• Link to full system information report as Gist: https://gist.github.com/ConstBur/62b966df4d0fabceb35dec479dca1374
• Proton version: 6.3-7, Experimental

I confirm:

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

Symptoms

The game crashes immediately after showing loading popup.
Using PROTON_HIDE_NVIDIA_GPU=0 and PROTON_ENABLE_NVAPI=1 env variables doesn't change the outcome.
Also found a reference to Forza's XML crash logfile in Proton's logfile ("C:\users\steamuser\AppData\Local\ForzaHorizon5\CrashReport.xml"), which I also attached to this issue; however it doesn't seem to have much useful info.

Reproduction

Simply launch the game.

steam-1551360.log
CrashReport.txt

Start by reproducing the immediate crash when launching Forza Horizon 5 with Proton 6.3-7 or Experimental, then inspect the attached steam-1551360.log and CrashReport.txt. Compare the reported behavior with the system information and environment-variable results; done means identifying a confirmed Proton-side cause and validating a fix that lets the game launch.