hi !
anyone here has a laptop with a rtx and ue4.22 dx12 that does not freeze ?
mata 
On a laptop make sure that it’s using the Nvidia GPU. Windows will try to figure out what programs should use the Intel integrated GPU vs. a dedicated GPU but it doesn’t always do a good job of it. To adjust this, open the Nvidia Control Panel and go into the 3D settings and tell it to use the Nvidia GPU for everything. The laptop will use more power with that setting but you’ll know it’s using the Nvidia GPU.
I have done that,but UE4 editor still freeze after the viewport lose focus(for expample:open the file menu). When I add -d3ddebug flag after -dx12 flag,UE4 will not freeze,but some project will crash.
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
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
Anyone found a solution to this? Maybe in general, how the hell are people using EU4 on windows with dx12? Without “-dx12”, it crashes because of dx11, but with dx12 the editor freezes/crashes no matter what drivers or forced GPU you use.