Zusi 3 - Aerosoft Edition (1040730)

Compatibility Report

• Name of the game with compatibility issues: Zusi 3 - Aerosoft Edition
• Steam AppID of the game: 1040730

System Information

• GPU: GTX 1660ti
• Driver/LLVM version: 455.45.01
• Kernel version: 5.9.11-3
• Link to full system information report as Gist: https://gist.github.com/besentv/464cc4aeedd8c33580e9d29aee9cce94
• Proton version: 5.13-4

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.

steam-1040730.log

Symptoms

The game (Zusi 3) uses an external dotNetCore executable called ZusiDisplay.exe to show speed and information displays in game.
On Windows it looks like this:

But using Proton they don't show up at all:

The game communicates with ZusiDisplay using Tcp/Ip. When multiple displays are running, only one (a master) directly communicates with the game and distributes data coming from the game to every other running instance also over Tcp/Ip. All displays send graphical data back to the game to show the displays.

Maybe this screenshot of htop helps:

When I run ZusiDisplay manually with Proton inside steam's prefix the program runs without crash when the main game is not running:
STEAM_COMPAT_DATA_PATH="/run/media/bernhard/ManjaroVolume2/SteamLibrary/steamapps/compatdata/1040730/" "/run/media/bernhard/ManjaroVolume2/SteamLibrary/steamapps/common/Proton 5.13/proton" run "/run/media/bernhard/ManjaroVolume2/SteamLibrary/steamapps/common/ZUSI 3 - Aerosoft Edition/_Tools/ZusiDisplay/ZusiDisplay.exe"

Reproduction

• Install the game.
• Install .netCore (windowsdesktop-runtime-3.1.10-win-x86) into the game's prefix:
  protontricks -c "wine /home/bernhard/Downloads/windowsdesktop-runtime-3.1.10-win-x86.exe" 1040730
• Copy all fonts from Windows into the prefix (ZusiDisplay crashes without):
  /SteamLibrary/steamapps/compatdata/1040730/pfx/drive_c/windows/Fonts/
• Run the game
• Open a timetable. e.g. :
  /ZUSI 3 - Aerosoft Edition/_Zusidata/Timetables/Deutschland/Siegstrecke/Blankenberg_Au_Altenkirchen_2018.fpn
• Play a train using ZusiDisplay eg. BR 423/424/425

Start with the attached steam-1040730.log and the ZusiDisplay.exe manual-run reproduction using Proton 5.13-4. Follow the listed .NET Core, font, timetable, and train-display setup, then compare behavior with the game running. Done means ZusiDisplay shows the displays and communicates with Zusi 3 during play.