Age of Empires IV (1466860) de-synchronization in multiplayer

[jaafit]

Compatibility Report

• Name of the game with compatibility issues: Age of Empire IV
• Steam AppID of the game: 1466860

System Information

• GPU: Radeon R9 290/390
• Driver/LLVM version: Mesa 20.1.6
• Kernel version: 5.11.0-41-generic
• Link to full system information report as [Gist](https://gist.github.com/):
• Proton version: Experimental

I confirm:

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

Even after adding PROTON_LOG=1 to my own app shortcut AND to Steam's app properties, I could find no file in my ~ or any subdirectories named anything ending in 1466860.log The closest matches were: ./.local/share/Steam/steamapps/compatdata/1466860 ./.local/share/Steam/steamapps/shadercache/1466860 ./.local/share/Steam/userdata/9056932/1466860 ./.local/share/Steam/userdata/9056932/config/shaderhitcache/SteamSwarm/VulkanPipelinesV6_c051953b051a89e3/1466860 ./.local/share/Steam/userdata/9056932/config/shaderhitcache/SteamSwarm/VulkanPipelinesV6/1466860 ./.local/share/Steam/userdata/9056932/config/shaderhitcache/SteamSwarm/VulkanPipelinesV6_904f69d2b1b44b66/1466860 ./.local/share/Steam/userdata/9056932/config/shaderhitcache/AMD RADV HAWAII (ACO)/f3b4f12dad1a098723d107cc63907e58/1466860 ./.local/share/Steam/userdata/9056932/config/shaderhitcache/AMD RADV HAWAII/4ba41ce9d828c2d1751a273c27b2296f/1466860

Symptoms

Every time I play or observe a multiplayer game, the game will freeze at some point and announce a de-sychronization error. Playing single-player is fine.

Reproduction

Play or observe a Multiplayer game for 3-5 minutes.

I have tried reinstalling. I tried resetting all settings to defaults. Lowest graphics settings. I contacted support and they auto-suggested opening ports, but I do see opponent units moving during the 3 minutes. So packets are getting through. I did forward the ports they recommended but to no avail.

[kisak-valve]

Hello @jaafit, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/5258#issuecomment-987122693.