Proton crashes on games installed on ntfs

[PlayerXYT]

Compatibility Report

• Name of the game with compatibility issues: Cult of the lamb is used as an example, this affects all proton games
• Steam AppID of the game: 1313140

System Information

• GPU: RTX 3080Ti
• Video driver version: nvidia 535.113.01-2
• Kernel version: 6.5.5.arch1-1
• Link to full system information report as Gist
• Proton version: 8, experimental, and hotfix

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

Proton games crash on startup due to "not having ownership"

Reproduction

Attach a drive or partition your existing drive
Format the drive to ntfs
Mount the drive
Download and install a steam game to that drive
Enable proton compatibility via the steam settings
Play the game, it will crash
Running steam from the command line will throw this error:
wine: '/run/media/playerxyt/DATA/SteamLibrary/steamapps/compatdata/1313140/pfx' is not owned by you
The pfx file has 777 permission but is owned by root (due to fstab)
drwxrwxrwx 1 root root 4096 Mar 9 2023 pfx
chown Will not work because it is not supported in ntfs
Reinstall the game to a linux file system (ext4 in root in my case)
The game will run perfectly

[kisak-valve]

Hello @PlayerXYT, there's several issues with Proton interacting with NTFS already (https://github.com/search?q=repo%3AValveSoftware%2FProton+NTFS+-label%3A%22Game+Compatibility+-+Unofficial%22&type=issues&state=open), which makes it quirky enough that the general recommendation is to use a Linux native filesystem with Proton instead of NTFS.

Wine requires that the wineprefix folder must be owned by the current user that is running it to prevent an entire category of hard to diagnose issues. Proton inherits this behavior. This specific issue is already being tracked at #4820.

Closing in favor of the older issue reports.