Problems with VisRTX Renderer in Linux

Hi Alexander,

I’m trying to use the VisRTX renderer in the most recent version of Ovito Pro (the GUI, not a Python script). I’m running on an Ubuntu desktop with two Nvidia GPUs. However, I get an error stating that there are ‘no CUDA capable devices’. Everything looks ok on my end; not sure what the issue is. Here is my nvidia-smi:

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 470.239.06   Driver Version: 470.239.06   CUDA Version: 11.4     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA TITAN V      Off  | 00000000:01:00.0  On |                  N/A |
| 32%   46C    P8    28W / 250W |    813MiB / 12063MiB |      2%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
|   1  NVIDIA TITAN Xp     Off  | 00000000:02:00.0 Off |                  N/A |
| 23%   27C    P8     8W / 250W |     11MiB / 12196MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+

Thanks for your help,
Nick

Hi Nick!

I’m not sure if this explains it, but the VisRTX component of OVITO Pro for Linux is built against CUDA Toolkit 12.0. Your SMI reports says CUDA Version 11.4. Maybe this is why VisRTX doesn’t see your device(s).

Do you think there is a way for you to bring this version number up to 12.x? Maybe by installing a newer device driver or a CUDA compatibility package (see CUDA Compatibility)?

Thanks Alexander, updated to CUDA 12.5 and it works like a charm!