Unreal engine fails to start. Linux

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#1

Hello,

So i have built engine from source and it worked at first, but after i changed monitors starting engine with ./UE4Editor -opengl4 throws this error. i have tried rebuilding the engine but it still throws the same error. I have no idea how should i debug this error and would appreciate some help.

[2020.01.21-14.35.33:453][  0]LogCore: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to read memory at address 0x0000000000000010

[2020.01.21-14.35.33:453][  0]LogCore: Fatal error!

0x0000000001772e68 CrashReportClient!OFFSCREEN_CreateWindow [/home/bschaefer/UnrealEngine/Engine/Source/ThirdParty/SDL2/SDL-gui-backend/src/video/offscreen/SDL_offscreenwindow.c:58]
0x000000000174b5de CrashReportClient!SDL_CreateWindow_REAL [/home/bschaefer/UnrealEngine/Engine/Source/ThirdParty/SDL2/SDL-gui-backend/src/video/SDL_video.c:1533]
0x0000000001286caf CrashReportClient!FSlateOpenGLContext::Initialize(void*, FSlateOpenGLContext const*) [/home/unreal/UnrealEngine/Engine/Source/Developer/StandaloneRenderer/Private/Linux/OpenGL/SlateOpenGLContext.cpp:192]
0x0000000001289721 CrashReportClient!FSlateOpenGLRenderer::Initialize() [/home/unreal/UnrealEngine/Engine/Source/Developer/StandaloneRenderer/Private/OpenGL/SlateOpenGLRenderer.cpp:84]
0x0000000000fa18b9 CrashReportClient!FSlateApplication::InitializeRenderer(TSharedRef<FSlateRenderer, (ESPMode)0>, bool) [/home/unreal/UnrealEngine/Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:1118]
0x000000000091c039 CrashReportClient!RunWithUI(FLinuxErrorReport) [/home/unreal/UnrealEngine/Engine/Source/Programs/CrashReportClient/Private/CrashReportClientApp.cpp:208]
0x000000000091d434 CrashReportClient!RunCrashReportClient(char16_t const*) [/home/unreal/UnrealEngine/Engine/Source/Programs/CrashReportClient/Private/CrashReportClientApp.cpp:358]
0x00000000009269e5 CrashReportClient!main [/home/unreal/UnrealEngine/Engine/Source/Programs/CrashReportClient/Private/Linux/CrashReportClientMainLinux.cpp:67]
0x00007fbb1d6cfbbb libc.so.6!__libc_start_main(+0xea)
0x000000000090e029 CrashReportClient!_start()
#2

What did you do to rebuild?

#3

At first i rebuilt it as usual

git clone --single-branch --branch 4.22 https://github.com/EpicGames/UnrealEngine.git
./Setup.sh
./GenerateProjectFiles.sh 
make

and just now i have rebuilt it with

make UE4Editor-Linux-Debug

I don’t know what actually happened but i think now everything is Ok, thanks for quick response

#4

That wouldn’t be a “rebuild”. Don’t know make so not sure if there’s a way to rebuild with it, but manually you can delete the binaries folder and then use make again, it does mean compiling the engine again though.

#5

“make clean” might work for you. That’s what I tend to use. It should cause everything to re-compile again same as fresh download.

Deleting everything is sure-fire way.

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