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Page: Checklist Proton bugs
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9 Checklist Proton bugs
HonkingGoose edited this page 2020-09-29 13:40:47 +02:00
Table of Contents

Checklist Proton bugs

This is a checklist to help you find relevant error messages in your Proton log.

General guidance

Search the Proton log for the following prefixes to find errors/warnings:

  • fixme:
  • err:
  • warn:
  • error:

Game won't start at all:

Steam2.dll

Tracked at https://github.com/ValveSoftware/Proton/issues/2613

  • warn:module:load_builtin_dll cannot open .so lib for builtin L"Steam2.dll":

Valve CEG DRM

Currently Steam for Linux does not generate the custom executable for games using Valve's CEG DRM, this is tracked at https://github.com/ValveSoftware/Proton/issues/753

You can look for cegpublickey on https://steamdb.info/app/<appid>/config/ to check if a game is using this.

Missing cinematic/cutscenes:

Problems with missing cinematics/cutscenes are most likely due to Media Foundation, Quartz or WMVcore issues. These are tracked at https://github.com/ValveSoftware/Proton/issues/1464

Media Foundation

  • mfplat.dll
  • mfplay.dll
  • mfreadwrite.dll
  • mfstartup.dll

Quartz

  • quartz.dll
  • fixme:quartz:MPEGSplitter_QueryInterface
  • err:quartz:GetClassMediaFile Media class not found

WMVcore

  • WMVcore.dll
  • fixme:wmvcore:WMReader_Open
  • fixme:wmvcore:WMCreateSyncReader

XNA

  • Microsoft.Xna.Framework.Video.dll

Audio playback issues:

Xaudio2

Xaudio2 issues are labeled "XAudio2" by the moderator. The Proton log typically includes one of the following:

  • XAudio2_7.dll
  • xaudio2_8.dll

Other errors:

.net

.net issues are labeled appropriately by the moderator. These include:

  • .NET-UE3 (Unreal Engine 3.)
  • .NET-winforms (System.Windows.forms toolkit)
  • .NET-WPF (PresentationFramework)
  • .NET-XNA (Uses XNA framework, implies Xaudio2 and possibly WMP)