New to RT - "Failed to compile" error

V-Ray GPU V-Ray GPU :: Issues
1

We just got our new workstations with good GPU’s and VRay 2 (been using 1.5sp6). VRay 2 is installed but every time I try to render with the GPU (either one or both) I get a “failed to compile” error in the console and a crash. Looks similar to http://www.chaosgroup.com/forums/vbulletin/showthread.php?52261-Failed-to-compile-OpenCL-kernels-falling-back-to-CPU-code

I have the latest nVidia drivers which according to the post above might be the problem. However that post is over 6 months old now… Any suggestions? What is the appropriate driver version to be using?

GeForce 580 3GB, Dell dual Xeon 6-core, 20GB RAM.

2

If you are using the 275.x drivers, they seem to have an issue. The 270.x drivers seem to work fine.

Best regards,
Vlado

3

Switching to 270.x drivers sort of fixed my problem.

With the new drivers it works if I use RT as a production renderer but immediately crashes if selected for ActiveShade.

Any other thoughts?

4

Nevermind. Didn’t think to change my active shade renderer to RT. It was on scanline and evidently if you leave it as scanline you crash Max.

5

I can tell you that I’ve tried RT on two machines, both Sandy Bridge, one with a Quadro 600 and the other with a GTX 580 and they both crashed RT using the latest 275 WHQL drivers. Installing the 270.X WHQL solved that issue on both machines.