EDIT: The issue was caused by my SSD being formatted in exFAT, which doesn’t support symlinks. I backed up my SSD & reformatted it to btrfs, and then I could install .NET without hassle & the game runs!

Original Post:

I’m having an issue running this game on linux, every time I click play in Steam I get the following popup:

“you must install .NET desktop runtime to run this application”

Clicking “yes” takes me to download a Windows .exe which of course can’t run on linux. I manually installed the .NET runtime following linux instructions here: https://learn.microsoft.com/en-us/dotnet/core/install/linux-debian but the game still gives me this error.

Other things I’ve tried:

  • Reinstalling BG3
  • Completely deleting every file from steamapps/common for BG3 & reinstalling
  • Reinstalling Proton
  • Skipping the launcher
  • Tried with proton experimental, 9, 8, 7

My launch args are STEAM_COMPAT_DATA_PATH=/home/user/.local/share/Steam/steamapps/compatdata gamemoderun %command% --skip-launcher

On protondb everybody else seems to be running the game fine, but I don’t understand how to get past this error.

  • mox
    link
    fedilink
    English
    2
    edit-2
    2 months ago

    That symlink approach is one way to run the game executable directly, but it’s a little heavy handed, and likely to be reverted whenever the game gets updates or you verify the game files.

    Sometimes you can put something like /path/to/game/executable.exe %command% in the Steam launch options to accomplish the same thing without symlinks. I suggest reading more of those comments to see if anyone had success with this approach.

    It might still be a good idea to replace exFAT, though. Symlinks are often useful. :)

    • @JozzoOP
      link
      English
      22 months ago

      Reporting back!

      Reformatted with btrfs, steam now does this when I open the game (didn’t before):

      anddd it works! Can’t believe this whole headache was just exfat all along lol!

      Thank you for your help :D

      • mox
        link
        fedilink
        English
        32 months ago

        Hooray!

        Have fun on the Sword Coast!