Wrong Word Length

[ssrdesigns]

Has anyone been able to figure out what is happening in this situation? I know its a very strange one and I very much appreciate everyone's guidance.

[pciccone]

I'm working on finding a solution and hopefully include it in an update to be released fairly soon.

[ssrdesigns]

Thank you so very much! I have a feeling it may be my actual laptop configuration. Somehow the GTX 980m is connected to the Intel onboard graphics, so that in lower graphics loads it switches to the onboard...and then in higher loads like gaming it switches to the 980m. When I disable the Intel graphics it disables both. I am still looking for a solution on my end. For now though I'm still able to use CPU rendering.

Again thanks so much.

[pciccone]

You're very welcome.

[pciccone]

[pciccone]

[Fram1963]

I re-did some testing with my laptop (Acer3830TG-6412 with 4GB DDR3 NVIDIA GeForce GT-540M / Intel HD Graphics 3000)

In my Device Manager:

Display adapters
- Intel(R) HD Graphics 3000
- NVIDIA GeForce GT 540M

The only two differences (in this specific area of the log) between my laptop and Dan's is that my Intel HD Graphics 3000 integrated GPU (iGPU) is not showing anywhere and, the order that LuxRays discover/list the devices are in my case the discrete GPU first then my CPU. In Dan's case, the iGPU is first then the CPU then the discrete GPU.

My log:

Dan's log:

AND

In the Render tab, in the listed the OpenCL installed, his version for Intel is 2.0, mine is 1.2. We have the same version for Nvidia (1.2). Could the Intel OpenCL 2.0 be causing this (newer generation of CPU) and LuxRays not playing nice with 2.0 yet?

I didn't disable the iGPU in the BIOS - there is no way to disable the iGPU and run the laptop ONLY on the discrete NVIDIA gpu. The only option I have in the BIOS is:
'switchable' for using both iGPU for lower-intensity tasks and discrete GPU for higher-intensity tasks
OR
'integrated' which means Intel HD Graphics 3000 only (this option sucks).

The discrete GPU passes through the iGPU which is what the monitor and other video ports are wired to. This is how most laptops are configured and there's nothing you can do about it. There's not much to do except go to switchable graphics options and hope it works.

It would be interesting to see how LuxRays determine the order of the devices and why the iGPU is showing for Dan and not for me.

Cheers,

[pciccone]

You might be into something with the OpenCL 2.0 deal. BTW, the issue is not that Lux is not playing nice. There is a mismatch of recognition of devices. Reality does not see the iGPU, while Lux does. We use a slightly different approach in device discovery. Reality uses the OCL C API, while Lux uses the C++ API. Theoretically both APIs should be the same, the C++ one being a wrapper around the C one. It is possible that the 2.0 API makes a difference.

[pciccone]

Also, thank you about highlighting the parts of the log. The NATIVE_THREAD device is not something that appears in the API that I saw. That might be the key. This is very useful stuff, thank you very much.

[Fram1963]

You're welcome Paolo! Hope you find a fix for this.

Cheers,