GPU Crash with [NVIDIA Internal] Shader

Gaming and Visualization Technologies Raytracing
1

Hi,

I’m investigating a GPU Hung we had recently.

My System Info is as follows:

RTX4080 | Driver Version 581.57 | Aftermath Version 2025.4

We are producing a new game with UE5.6. I integrated RTXDI 5.6 into our main branch, and the engine randomly has GPU crashes when we enable it.

The Active Markers are shown as follows:

图片
图片1050×585 21 KB

The Aftermath GPU dump shows that the GPU crashes are in a NVIDIA Internal shader.

图片
图片2083×1266 171 KB

I attached the crash data.

Any ideas on how to continue the investigation would be great! Thank you!

UECC-Windows-2E7B0B0A420B7EE498C486A8F90ABEAB_0000.zip (3.9 MB)

2

Hi there,

We had a similar issue a while back, and here’s a quick (and temporary) workaround you can probably try - basically you only shade pixels with SHADINGMODELID_DEFAULT_LIT in EvaluateLightSample(), i.e. avoid calling EvaluateBxDF() for all other shading models. Of course this won’t work in production, but in our case it did stop the crash from happening.

If this works on your end as well you can try debugging from there, might give you some hints as to what exactly going on.

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