Kernel 'KSampleCopy4_1_x_8' not found under Unity 2018.3

I've just updated to Unity 2018.3, and updated HDRP and ShaderGraph to 4.6. I'm seeing this in every scene, even a brand new scene. I'm also seeing this if I just open one of my Shader Graph shaders, despite there not being any apparent errors I can see (purple nodes) in Shader Graph.

I've tried deleting Library/ScriptAssemblies, Library/PackageCache, and Library/ShaderCache. This doesn't happen on a brand new project, but I don't see any details in the error to help me pin this down to something in my project. I've set my SRP to a new, default HDRP profile. I tried downgrading to version 4.3 of HDRP and Shader Graph, but it's the same story.

Anyone else seeing this? Any way to figure out what's causing it?

Code (CSharp):

1. ArgumentException: Kernel 'KSampleCopy4_1_x_8' not found.
2. UnityEngine.Experimental.Rendering.GPUCopy..ctor (UnityEngine.ComputeShader shader) (at Library/PackageCache/com.unity.render-pipelines.high-definition@4.6.0-preview/Runtime/Core/CoreResources/GPUCopy.cs:16)
3. UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline..ctor (UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipelineAsset asset) (at Library/PackageCache/com.unity.render-pipelines.high-definition@4.6.0-preview/Runtime/RenderPipeline/HDRenderPipeline.cs:253)
4. UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipelineAsset.InternalCreatePipeline () (at Library/PackageCache/com.unity.render-pipelines.high-definition@4.6.0-preview/Runtime/RenderPipeline/HDRenderPipelineAsset.cs:23)
5. UnityEngine.Experimental.Rendering.RenderPipelineAsset.CreatePipeline () (at C:/buildslave/unity/build/Runtime/Export/RenderPipeline/RenderPipelineAsset.cs:19)
6. UnityEngine.Experimental.Rendering.RenderPipelineManager.PrepareRenderPipeline (UnityEngine.Experimental.Rendering.IRenderPipelineAsset pipe) (at C:/buildslave/unity/build/Runtime/Export/RenderPipeline/RenderPipelineManager.cs:55)
7. UnityEngine.Experimental.Rendering.RenderPipelineManager.DoRenderLoop_Internal (UnityEngine.Experimental.Rendering.IRenderPipelineAsset pipe, UnityEngine.Camera[] cameras, System.IntPtr loopPtr) (at C:/buildslave/unity/build/Runtime/Export/RenderPipeline/RenderPipelineManager.cs:28)
8. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
9.  

 

I had this same issue. I was able to get around it by completely deleting the HDRP and Shader Graph packages and re-importing them new. Maybe it's caused by an old leftover file or something didn't update fully for some reason?

 

Good call. I complete removed HDRP and Shader Graph, restarted Unity, and readded them. This resolved my issue. Thanks a bunch.

 

Is there a known reason why this can happen? It hits us semi frequently when building standalones (Vulkan on Linux) - occasionally we'll just get nothing but a black screen on the built version and the log is screaming about

KSampleCopy4_1_x_8

. Very occasionally we get it in the editor too. In the past we noticed that if we jiggled the supported/preferred graphics API in Player Settings it would trigger .. something? .. that fixed it.

We'll try reimports if it persists, but is there any known longer term workaround for it? Given how sporadic the failure is, it's hard to repro and send in as a bug.

 

From what we saw, when this black screen issue happens, we disable post-processing in the scene and it manages to render properly (without PP ofc). Maybe this would help somewhat to narrow down this issue..

 

Having a problem with this…


I’ve created a NEW project (Unity 2018.3.0f2 with HDRP 4.10.0)

When I added basic assets ( cube + sphere), they showed up as wire outlines (in shaded view) – and game view was black. I had a similar error message as above/dgoyette.

Chose to remove HDRP – then reimported it. Now HDRP/Lit materials are showing up as pink and there is No Option Render Pipeline under the Edit Menu.

Can anyone explain what’s going on/how to fix?
[I’ve closed/re-opened the project btw]

 

@Remy_Unity Hi - thanks for getting back - I submitted this as a bug - if you'd like more info just let me know (1130603)

 

hi, i have just removed them, restarted unity, how do i download them again?

 

The same way you should have removed them: via the Package Manager.

 

you probably have to make all preview packages visible via the little advanced tab on top

 

I had simular issue on Ubuntu with Vulkan and HD pipeline. For me helped to install vulkan-utils: https://linuxconfig.org/install-and-test-vulkan-on-linux
For Ubuntu works: sudo apt install vulkan-utils.

 

Had this happen to me. The way to reproduce: make an HDRP project on Windows, create git repository and pull the project on Mac.

To fix, just re-import the HDRP package.