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UE4 Freezes when ran with -DX12 arg on laptop running 2080 ( no MaxQ)

anyone here has a laptop with a rtx and ue4.22 dx12 that does not freeze ?

Product Version: UE 4.22
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asked Apr 04 '19 at 08:25 PM in Installation & Setup

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dehon2
26 2 1

avatar image tahayaki Apr 05 '19 at 08:24 AM

same issue on a 2070 laptop

avatar image tahayaki Apr 05 '19 at 08:25 AM

you can run ue4 on an external monitor connected to the gpu. another workaround is to run the editor with d3ddebug argument

avatar image tahayaki Apr 05 '19 at 08:28 AM

did you submit a bug report, I had no luck, they couldnt reproduce in my case?

avatar image dehon2 Apr 05 '19 at 01:02 PM

ok but when I write:

"C:\Program Files\Epic Games\UE_4.22\Engine\Binaries\Win64\UE4Editor.exe" -dx12 -d3ddebug
ue4 crashes upon launching

without a space between dx12 and -d3ddebu, UE4 does not crash but it does not take into account the r.ray commands.

I tried to reverse -dx12 and -d3ddebug, to place " in various places, and even to take them out but the result is the same...

In all cases, my drivers and windows are ok!

Help :-) Where must I submit the bug reports?

avatar image tahayaki Apr 05 '19 at 01:06 PM

yeah thats correct large projects crash but some smaller projects dont. thats also really annoying for me that I cant use it on my main monitor.

You can submit it here;

https://epicsupport.force.com/unrealengine/s/

avatar image dehon2 Apr 05 '19 at 02:57 PM

bug :

LoginId:71dbecdf4f2b5d027b2ed0a5c6eb5347 EpicAccountId:a2a0f1c6c9de4ee6884f68ec13952eca

Assertion failed: [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 263] D3D12GetDebugInterface(IID_PPV_ARGS(DebugController.GetInitReference())) failed at D:\Build++UE4\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Adapter.cpp:99 with error 887A002D

UE4Editor_Core UE4Editor_Core UE4Editor_Core UE4Editor_D3D12RHI UE4Editor_D3D12RHI UE4Editor_D3D12RHI UE4Editor_D3D12RHI UE4Editor_RHI UE4Editor UE4Editor UE4Editor UE4Editor UE4Editor kernel32 ntdll

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3 answers: sort voted first

yeah thats correct large projects crash but some smaller projects dont. thats also really annoying for me that I cant use it on my main monitor.

You can submit it here;

https://epicsupport.force.com/unrealengine/s/

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answered Apr 05 '19 at 01:06 PM

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tahayaki
11 1 2

avatar image dehon2 Apr 05 '19 at 01:38 PM

ok done ..

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Same here

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answered Apr 12 '19 at 01:07 PM

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markmarker
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avatar image tahayaki Apr 12 '19 at 01:11 PM

check also here,

https://answers.unrealengine.com/questions/876099/view.html?sort=oldest

dont forget to submit a bug report so that epic team maybe can reproduce it with you. https://epicsupport.force.com/unrealengine/s/

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Ok, I finally found a workaround, which is not the best but at least it lets you to work on any project if you dont have a monitor around.

Normally if you disable intel card from device manager before opening ue4, the engine doesnt work, but if you open the project with the intel card enabled and as soon as engine starts you should minimize the engine without clicking anything, its important that you minimize it, otherwise the video card crashes, then after minimizing go to the device manager and disable the intel card, then the editor should work.

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answered Apr 14 '19 at 04:40 PM

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tahayaki
11 1 2

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