UE4 Editor crashes when I open it without Dual / External Monitor connected

anonymous_user_b220333c · February 1, 2021, 10:15pm

I am having an issue with a project I created while my laptop was connected to a smart TV (Veon tv).

I have been working on this project for some time now. Due to covid lockdown I have not disconnected my laptop from dual monitor for a while and tried to open my project while my laptop is not connected to any external monitors, the editor crashes as soon as mouse cursor leaves viewport.

Laptop details:
-Device Name: LAPTOP-AC108NU2
-Processor: AMD Ryzen 5, 3550h with Radeon Vega Mobile GFX 2.10 GHz
-RAM: 16gb
-System type: 64 bit

TV Monitor Details:
-Veon
(will add specific details soon)

Things I found while trouble shooting:

-If laptop is not connected to external monitor the editor crashes when project opens unless mouse is inside viewport, but will crash as soon as mouse leaves viewport.

-If laptop is connected to external monitor and the external monitor is set as main display in settings everything works fine as unreal will open on external monitor.

-If I have Unreal editor is open and I go into settings and set my laptop screen as main display Unreal will crash.

-If I have Unreal open and disconnect the HDMI cable it will crash.

-If I drag editor from external monitor to laptop screen Unreal will crash

-If I open projects that I created while laptop is not connected to external display.

-If I open projects that I created while my laptop is not connected to any external monitors they work completely fine regardless to whether my laptop is connected to external monitor or not and I can drag editor back and forth between displays without problems

EDIT: Found something new! -If I have the display settings (size of text, apps, and other items) set to the same percentages instead of the recommended settings (which is 150% for tv monitor and 125% for laptop) the unreal editor will not crash unless I maximize the window.

End of Crash log file:

[2021.02.01-21.15.57:297][ 1]LogCollectionManager: Fixed up redirectors for 0 collections in 0.000017 seconds (updated 0 objects)

[2021.02.01-21.16.01:173][ 2]LogShaderCompilers: Display: Worker (3/5): shaders left to compile 6472

[2021.02.01-21.16.01:908][ 2]LogShaderCompilers: Display: Worker (2/5): shaders left to compile 6462

[2021.02.01-21.16.02:585][ 2]LogThreadingWindows: Error: Runnable thread RHIThread crashed.

[2021.02.01-21.16.02:585][ 2]LogWindows: Error: === Critical error: ===

[2021.02.01-21.16.02:585][ 2]LogWindows: Error:

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: Fatal error!

[2021.02.01-21.16.02:586][ 2]LogWindows: Error:

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000048

[2021.02.01-21.16.02:586][ 2]LogWindows: Error:

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff87906a790 nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff87903a34b nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878ccc1da nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878ccbd7b nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878284d4a nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878e12d5c nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878ce61f8 nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878fbe29a nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878fbc492 nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff878363121 nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8784da579 nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff87832a753 nvwgf2umx.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff87ca1bf66 d3d12.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff87ca1b483 d3d12.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c02674a9 dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c026983b dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c022a3ac dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c01f4b6a dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c02048f9 dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c020373b dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c01f5050 dxgi.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff83115e74a UE4Editor-D3D12RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff83115e1da UE4Editor-D3D12RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff831165ccd UE4Editor-D3D12RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff848e82f0c UE4Editor-RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff848e87b73 UE4Editor-RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff848e710eb UE4Editor-RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff848e89ad0 UE4Editor-RHI.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff845d1ed11 UE4Editor-Core.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff845d1f0fe UE4Editor-Core.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff84b1a2a73 UE4Editor-RenderCore.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff846277cdb UE4Editor-Core.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff846270970 UE4Editor-Core.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c2a07034 KERNEL32.DLL!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: [Callstack] 0x00007ff8c47fd0d1 ntdll.dll!UnknownFunction []

[2021.02.01-21.16.02:586][ 2]LogWindows: Error:

[2021.02.01-21.16.02:586][ 2]LogWindows: Error: Crash in runnable thread RHIThread

[2021.02.01-21.16.02:603][ 2]LogExit: Executing StaticShutdownAfterError

[2021.02.01-21.16.02:603][ 2]LogWindows: FPlatformMisc::RequestExit(1)

[2021.02.01-21.16.02:603][ 2]LogCore: Engine exit requested (reason: Win RequestExit)

[2021.02.01-21.16.02:615][ 2]Log file closed, 02/02/21 10:16:02

Launcher Crash Report:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000048

nvwgf2umx

D3D12

dxgi

UE4Editor_D3D12RHI

UE4Editor_D3D12RHI
UE4Editor_RHI
UE4Editor_RHI

UE4Editor_RHI

UE4Editor_Core

UE4Editor_RenderCore

UE4Editor_Core

kernel32

ntdll

anonymous_user_b220333c · February 2, 2021, 7:07am

I fixed it! I opened up the the ini files in the config folder and compared them to the ini files of my older project that was not having this problem.

In DefaultEngine.ini I found this -

[/Script/WindowsTargetPlatform.WindowsTargetSettings]

DefaultGraphicsRHI=DefaultGraphicsRHI_DX12

This does not exist in the ini file of my working project and it says RHI-Thread in the error log so I removed it and now everything is working like normal.

I still have no idea what this means though and if anyone has any info it would be much appreciated.

QYNTEL7 · January 26, 2023, 10:41am

Hi buddy,

I am having the same problem. Where can I find this
[/Script/WindowsTargetPlatform.WindowsTargetSettings]
Am I completely removing it? And then it works?