LuxCoreRender Forums

Hi.
I need a little help here with open cl devices.
i use select devices like this "opencl.devices.select = 11\n"); and it work perfectly on one of my machine with AMD Gpu but when i used it on another machine with nvidia Gpu it show an error "OpenCL device selection string has the wrong length, must be 1 instead of 2" and as you can see clearly luxcore detect just one openCl device.

I even try to use GetOpenCLDeviceDescs(); to detect Gpus but got no where as i can see first and secound device in return.
what's the problem here ?

Can you post the complete output of clinfo ? It is usually included with OpenCL drivers otherwise it should be available here: https://github.com/Oblomov/clinfo (https://ci.appveyor.com/api/projects/ob ... orm%3a+x64)

You could have a second Intel OpenCL platform without devices

Dade wrote: ↑Tue Sep 24, 2019 7:52 am Can you post the complete output of clinfo? It is usually included with OpenCL drivers otherwise it should be available here: https://github.com/Oblomov/clinfo (https://ci.appveyor.com/api/projects/ob ... orm%3a+x64)

You could have a second Intel OpenCL platform without devices

Hi Dade.
here is the clinfo you asked for.

TAO wrote: ↑Tue Sep 24, 2019 8:17 am here is the clinfo you asked for.

clinfo.zip

It looks ok.

Are you using some other "opencl.*" property for LuxCore ? Like the one to explicit select the platform or to use only GPUs or CPUs devices. Can you run LuxMark and LuxCoreUI to check how many devices they see ? In LuxCoreUI there is a menu Windows => OpenCL device editor option to check the devices available.

Interesting, i ran luxmark and i can see only one device in there too.

TAO wrote: ↑Tue Sep 24, 2019 8:50 am Interesting, i ran luxmark and i can see only one device in there too.


Annotation 2019-09-24 121712.png

Sometime, Windows updates break driver installation, the Intel OpenCL platoform may be broken, you could try to re-install, it usually fixes the problem.

My problem is Gpu openCl, Cpu openCl works perfect.
Also i reinstall Gpu driver multiple times.

I reinstall GPU driver and run some other applications to see if openCl works or not and it's working.
But with luxcore same as past, not even detected !

Any suggestions here?

TAO wrote: ↑Tue Sep 24, 2019 12:20 pm Any suggestions here?

I have sincerely no idea, the fact that LuxMark doesn't recognize your Nvidia platform is very strange and it is the same, many years old, executable that has been tested on hundred of thousands of OpenCL installations.

I would try to remove the Intel OpenCL, than re-install Nvidia drivers and check how LuxMark work at that point.