Hi there,

got me a Titan Black and upgradet from Ubuntu 12.04 to 14.04 everything working fine so far exept that the opencl option for the pyrosolver returns an error. It seems Houdini has problems finding the opencl driver.

I attached the Houdini infotext file. In it it says:
No Configured OpenCL Device

A middelmouse klick over the pyrosolver gives me this:
no opencl platform found (-32)
Opencl Exeption clfinish (-36)


I tried several different Nvidia drivers and different versions of Houdini but the error persists.
The driver I'm running now is the 340 one. Houdini is now the latest daily build which is 521.

Any suggestions would be great.

Cheers

Similar issue have been reported
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1311362 [bugs.launchpad.net]
Solutions are listed at the bottom.

Thank you for the reply, did some googling on the topic and found that this seems to be an Nvidia driver bug affecting only the open Cl computing. It is there since driver version 313. Today I installed version 343.22 and there still is no change. Nobody seems really to be interested in removing this. Guess for now the 6GB of ram on the Titan are a waste. Hope they solve this soon because I am curious how large sims one can run on the GPU.

UPDATE – What is new in Driver version 343.22 is that it completely crashes Houdini if you switch to open Cl and hit play. Will revert to 340 now.


– 340 also crashes. Guess I didn’t hit the play button before.

Anyway no open Cl acceleration on Ubuntu 14.04 for now.

I'm not the most experience with this, but I think I have it working. I recently built a new system with ubuntu 14.04 on a GTX970. Mine would error out the same way until I installed additional CUDA drivers.

http://docs.nvidia.com/cuda/cuda-getting-started-guide-for-linux/#axzz3JNvsmWej [docs.nvidia.com]

Currently seems to be working, but I ended up going through an xorg ppa for my drivers. Here's a link for that:

http://ubuntuhandbook.org/index.php/2014/09/nvidia-343-22-install-in-ubuntu-1404/ [ubuntuhandbook.org]

Hope this helps!

Also I should note I am on 343.22 nvidia drivers and houdini indie: 13.0.582.