ZLUDA won't work with higher version of Blender 4.0+ (Blender 4.2 Alpha tested)

[gioxyer]

When testing ZLUDA on Blender 4.2 Alpha it doesn't work, version tested Blender 4.2.0 [cfb60c98be7d], as main error display on viewport appear "Failed to configure CUDA context (Invalid context)".

Recognise correctly ZLUDA in render engine

Error "Failed to configure CUDA context (Invalid context)" in viewport

Error "Failed to configure CUDA context (Invalid context)" in final render

Display CMD main error

Main error: Invalid context in cuStreamCreate(&cudastream, CU_STREAM_NON_BLOCKING) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\queue.cpp:21) Invalid context in cuCtxPopCurrent(NULL) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:19) Invalid value in cuCtxPushCurrent(device->cuContext) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:14) Invalid context in cuCtxPopCurrent(NULL) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:19) Invalid context in cuDevicePrimaryCtxRelease(cuDevice) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\device_impl.cpp:139) Failed to configure CUDA context (Invalid context)

Refer to the Cycles GPU rendering documentation for possible solutions: https://docs.blender.org/manual/en/latest/render/cycles/gpu_rendering.html

Invalid value in cuCtxPushCurrent(device->cuContext) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:14) Invalid context in cuStreamCreate(&cudastream, CU_STREAM_NON_BLOCKING) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\queue.cpp:21) Invalid context in cuCtxPopCurrent(NULL) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:19) Invalid value in cuCtxPushCurrent(device->cuContext) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:14) Invalid context in cuCtxPopCurrent(NULL) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:19) Invalid context in cuDevicePrimaryCtxRelease(cuDevice) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\device_impl.cpp:139) Error: Failed to configure CUDA context (Invalid context)

[chocolatewafer]

some issues with the alpha build maybe? Blender 4.0 works fine for me with a RX 560X card.

[gioxyer]

With Blender 4.0 I didn't have any issue too, but if you try Blender 4.1 Release Candidate or Blender 4.2 Alpha seems that check if there is cuda cores inside Blender (cuCtxPushCurrent, cuStreamCreate, cuCtxPushCurrent, cuCtxPopCurrent)

[vosen]

Should be fixed as of the latest version

[gioxyer]

Hi, I tried to download the updated version, it show this main error, as version tested 35c6c11c7edf

Error: OsError { function: "DetourCreateProcessWithDllsW", error_code: 14001, message: "Unable to start the specified application. The application's side-by-side mode configuration is incorrect. Please consult the application event log or use the command-line tool sxstrace.exe to get more information." }

[vosen]

What happens if you start blender.exe normally? What happens if you check "Unblock" in blender.exe properties and try to run with ZLUDA? Windows tends to block unknown freshly-download .exe and this might be the case here

[gioxyer]

You're right, seems windows blocking, I will try unzip again the file and then I will need proably to open blender.exe before zluda.

It says Unable to execute the App on your pc

[gioxyer]

Now it open correctly, but seems give similar error, probably lower than before

Invalid value in cuCtxPushCurrent(device->cuContext) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:14) Invalid context in cuStreamCreate(&cudastream, CU_STREAM_NON_BLOCKING) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\queue.cpp:21) Invalid context in cuCtxPopCurrent(NULL) (C:\Users\blender\git\blender-vdev\blender.git\intern\cycles\device\cuda\util.cpp:19)

[vosen]

Did you build from source? If so what revision (shuld be 067c923408e962260bc4cfbf9374b3f75ca939ff)? The release binaries are for an older version. I'm asking because I'm getting the same error when using previous git revision, but it works fine here with the newest one

[gioxyer]

I just use this version 067c923, but I add zluda.exe, because I didn't find in zluda folder with files used before, probably it could create conflict?

[vosen]

This won't work, one needs to build from source (and sorry, it should be 7d4147c8b2cc31422a73f5db3ec065db8af82246, though it's identical to 067c923). If it's not urgent maybe wait a bit? I'll add an automatic build on each commit, so you will be able to download ready-to-use prerelease package. I did not foresee so much interest in the work-in-progress versions

[gioxyer]

No problem, I can safely wait. It was interesting to try some features of Blender 4.2, anyway in general zluda I must say is improving a lot, I also tried some fork versions of lshqqytiger, you are doing a great job. I had made a video about it and I must say there is a fair amount of interest in general, for the versions though Blender official and with other software always on 3d.

[BaalNetbek]

I compiled the latest version and it's working with 4.1. You can try yourself. zluda-3-windows_7d4147c.zip

[gioxyer]

It works now with both version Blender 4.1 and Blender 4.2 Alpha, thank you so much for your help