Luxcore 2.4 CUDA not working

[phoenixart]

Hi,

I'm trying Luxcore 2.4 CUDA and I'm having a couple of issues.
First thing I noticed after the installation is that I get a warning about the AI_denoise_addon missing.

Then, when I switch to Luxcore I only see two options: CPU and OpenCL.
Am I missing something?

I got the latest build from here:
https://github.com/LuxCoreRender/BlendLuxCore/releases

Thanks for any help.

[Dade]

Then, when I switch to Luxcore I only see two options: CPU and OpenCL.

Select OpenCL and than go in the device list and you will see your GPU is listed 2 times: one as OpenCL device and one as CUDA device, just select only the CUDA device.

BlendLuxCore has not yet been updated.

[phoenixart]

Thank you, Dade

Of course, I realized that right after I posted

This is how the device list looks on my end

which I thought it was a little confusing as it shows 4 devices for the OpenCL and two for the CUDA (I have two 1080ti)

Anyway, after I start a viewport shading this is what happens

and basically nothing happens even if I wait for a few minutes.
The only thing I can do at this point is to end the Blender from the task manager.

[phoenixart]

Never mind, it seems now it's working although the viewport is quite unresponsive (I only have the default cube in the scene)

[Dade]

which I thought it was a little confusing as it shows 4 devices for the OpenCL and two for the CUDA (I have two 1080ti)

This is a bit strange, you should try LuxMark and check how many devices it lists. You should see only 2 OpenCL devices.

P.S. the first (and only) time you run a render engine on a device, LuxCore has to compile the GPU kernels and it takes quite some time (about 2 mins on a AMD 3900X).

[phoenixart]

Strange indeed, LuxMark lists 4 GPUs:

[Dade]

Strange indeed, LuxMark lists 4 GPUs:
Snipaste_2020-05-05_23-35-18.png

It is very strange and if it happens with LuxMark it is likely to be a bug in some NVIDIA driver release. LuxMark has not been touched and has worked for years.