# UE4 Freezes when ran with -DX12 arg on laptop running 2080 MaxQ without secondary screen **URL:** \ **Category:** Rendering\ **Tags:** UE4-22, freeze, unreal-engine, dx12, question\ **Created:** [February 20, 2019, 9:34pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797 "2019-02-20T21:34:36Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![anonymous\_user\_1dafbe0f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_1dafbe0f](https://forums.unrealengine.com/u/anonymous_user_1dafbe0f)\ **Post date:** [May 22, 2019, 9:03am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/41 "2019-05-22T09:03:31Z")
It’s listed as fixed in 4.22.2, I’ve not had a chance to test it yet. Is our nightmare over? ---
**Author:** ![robob3ar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@robob3ar](https://forums.unrealengine.com/u/robob3ar)\ **Post date:** [May 22, 2019, 12:48pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/42 "2019-05-22T12:48:20Z")
damnit, got a freeze (I’m on desktop) only this time it still runs the cpu but says not responding anyway… … maybe I should try with a new project or something? ---
**Author:** ![robob3ar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@robob3ar](https://forums.unrealengine.com/u/robob3ar)\ **Post date:** [May 22, 2019, 12:50pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/43 "2019-05-22T12:50:38Z")
nope, not fixed for me ---
**Author:** ![stephanebourez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephanebourez/32/498532_2.png) [@stephanebourez](https://forums.unrealengine.com/u/stephanebourez)\ **Post date:** [May 22, 2019, 4:30pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/44 "2019-05-22T16:30:30Z")
I’m happy to say that the freeze has been fixed with 4.22.2 I can’t reproduce it, I’ve tried a few times and the engine behaves perfectly now. @PfazFWC Let me know if everything works on your side and I’ll be happy to mark this as ‘answered’ ---
**Author:** ![stephanebourez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephanebourez/32/498532_2.png) [@stephanebourez](https://forums.unrealengine.com/u/stephanebourez)\ **Post date:** [May 22, 2019, 4:30pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/45 "2019-05-22T16:30:39Z")
In your **Nvidia Control Panel\>Manage 3D Settings\>** have you set Global Settings and/or Program Settings (pick ue4 in the dropdown) to **High-performance Nvidia Processor**? ---
**Author:** ![tahayaki](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tahayaki](https://forums.unrealengine.com/u/tahayaki)\ **Post date:** [May 22, 2019, 4:32pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/46 "2019-05-22T16:32:20Z")
it also works for me without any problems now with the new update ---
**Author:** ![robob3ar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@robob3ar](https://forums.unrealengine.com/u/robob3ar)\ **Post date:** [May 22, 2019, 4:52pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/47 "2019-05-22T16:52:52Z")
ok I’ve disabled threaded optimisation, texture filtering to high performance and works for a few minutes more, got a freeze upon pressing on houdini engine …ok might be working… further testing … almost working and after 20 mins freezes on disabling all lights, OK, at least I can do something more… still might be buggy ---
**Author:** ![robob3ar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@robob3ar](https://forums.unrealengine.com/u/robob3ar)\ **Post date:** [May 22, 2019, 7:25pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/48 "2019-05-22T19:25:57Z")
I’ve just set it now… and nope, still freezing, ■■■■, now if it can’t be reproduced it I’m screwed right? one of the reasons I got the rtx is exactly for ue 😕 … latest (gaming) mobo and latest gpus and it’s screwed because of it … ---
**Author:** ![Skalamanga](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skalamanga](https://forums.unrealengine.com/u/Skalamanga)\ **Post date:** [May 30, 2019, 12:54pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/49 "2019-05-30T12:54:57Z")
Not fixed for me, it stays stable longer but still freezes after several minutes. Please do not mark this as answered until tests prove this is categorically correct. ---
**Author:** ![robob3ar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@robob3ar](https://forums.unrealengine.com/u/robob3ar)\ **Post date:** [May 30, 2019, 1:21pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/50 "2019-05-30T13:21:39Z")
Yup, still freezes, stays on a bit longer, but not really solved ---
**Author:** ![Skalamanga](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skalamanga](https://forums.unrealengine.com/u/Skalamanga)\ **Post date:** [June 24, 2019, 12:18pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/51 "2019-06-24T12:18:38Z")
4.22.3 seems to be working, not seen a crash on it and I was running it for over an hour ---
**Author:** ![Ayu889900](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ayu889900](https://forums.unrealengine.com/u/Ayu889900)\ **Post date:** [December 8, 2019, 11:18am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/52 "2019-12-08T11:18:05Z")
Same thing happend again on UE4.23.1 and UE4.24 preview4. But this time Editor crash immediately instead of freeze. I must use secondary screen to keep it not crash. ---
**Author:** ![tahayaki](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tahayaki](https://forums.unrealengine.com/u/tahayaki)\ **Post date:** [December 9, 2019, 8:15am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/53 "2019-12-09T08:15:02Z")
yeah same here, did you submit a bug ticket? ---
**Author:** ![tahayaki](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tahayaki](https://forums.unrealengine.com/u/tahayaki)\ **Post date:** [December 9, 2019, 8:35am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/54 "2019-12-09T08:35:49Z")
created another bug report > **[Unreal crashes on Laptop when Ray tracing enabled, any solutions?](https://forums.unrealengine.com/questions/938427/view.html)** > > I previously had the same problem on my RTX laptop, when I enable the ray tracing it used to freeze, now it crashes. Connecting an external monitor or disabling intel gpu as engine opens fixes the issue. It was fixed on 4.22.3 now it started again,... ---
**Author:** ![stephanebourez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephanebourez/32/498532_2.png) [@stephanebourez](https://forums.unrealengine.com/u/stephanebourez)\ **Post date:** [December 9, 2019, 8:54am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/55 "2019-12-09T08:54:01Z")
And I’ve submitted a detailed bug report bug on [Unreal Engine Community](https://epicsupport.force.com/unrealengine/) I’m waiting for their feedback. our case is Case # 00144149. Hopefully they’ll acknowledge it as a bug and a ticket will be created. FYI here’s what I’ve written in the Bug report: Title Unreal Engine 4.23.1 and 4.24.0 p4 crashes on Laptops equipped with Nvidia RTX MaxQ cards when not hooked up on a secondary screen Steps 1. Open a raytracing enabled project with UE4.23.1 or UE4.24.0p4 2. USe the engine U.I for a bit. For exemple In a lit perspective viewport click on a U.I. button such as ‘Lit’, hover down the item list, or change parameters in a detail panel. Results The engine crashes, when the Laptop it is NOT hooked up to a secondary screen. The engine performs normally when hooked up to a scondary screen. Expected The engine should performs normally when it is NOT hooked up to a scondary screen. Description The engine crashes on Raytracing enabled projects, when a Laptop equipped with a Nvidia RTX MaxQ design card is NOT hooked up to a secondary screen. The card uses the Nvidia Studio Driver 441.28 ---
**Author:** ![tahayaki](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tahayaki](https://forums.unrealengine.com/u/tahayaki)\ **Post date:** [December 9, 2019, 8:59am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/56 "2019-12-09T08:59:56Z")
I have the same problem even though I dont have a Maxq card, I have a normal 2070,i think its a problem with having an extra intel gpu, it somehow kicks in, when you disable the intel card as the engine loads, it works normally, but disabling it before clicking on launch on engine makes the engine to run with around 1 fps for some reason. ---
**Author:** ![stephanebourez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephanebourez/32/498532_2.png) [@stephanebourez](https://forums.unrealengine.com/u/stephanebourez)\ **Post date:** [December 9, 2019, 9:05am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/57 "2019-12-09T09:05:39Z")
Yes, I agree, it must be related to the integrated Intel card. I’ve only given my Nvdia details to be as precise as possible. They’ve sorted this issue out in 4.21.2. Hopefully they’ll iron it out again, soon. ---
**Author:** ![Ayu889900](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ayu889900](https://forums.unrealengine.com/u/Ayu889900)\ **Post date:** [December 9, 2019, 12:14pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/58 "2019-12-09T12:14:08Z")
I have submitted a bug ticket. hopefully they can solve it soon ---
**Author:** ![stephanebourez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephanebourez/32/498532_2.png) [@stephanebourez](https://forums.unrealengine.com/u/stephanebourez)\ **Post date:** [December 12, 2019, 3:36pm UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/59 "2019-12-12T15:36:26Z")
Here’s Epic’s answer regarding this bug, now known as UE-72117 : Hello, Thanks for reporting this. I have added the details you provided to the ongoing bug. You can track its progress here: [Unreal Engine Issues and Bug Tracker (UE-72117)](https://issues.unrealengine.com/issue/UE-72117) Please add your vote, to help this issue being solved faster. Cheers ---
**Author:** ![stephanebourez](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephanebourez/32/498532_2.png) [@stephanebourez](https://forums.unrealengine.com/u/stephanebourez)\ **Post date:** [December 28, 2019, 10:03am UTC](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797/60 "2019-12-28T10:03:26Z")
Merry Xmas, it seems to be fixed with 4.24.1 and Nvidia’s December Studio Drivers. [Previous page](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797.md?page=2) [Next page](https://forums.unrealengine.com/t/ue4-freezes-when-ran-with-dx12-arg-on-laptop-running-2080-maxq-without-secondary-screen/443797.md?page=4)