CUDA Runtime API error 38: no CUDA-capable device is detected

Question

The Situation

I have a 2 gpu server (Ubuntu 12.04) where I switched a Tesla C1060 with a GTX 670. Than I installed CUDA 5.0 over the 4.2. Afterwards I c

Answer 1

I got error 38 for cudaGetDeviceCount on a windows machine with GTX980 GPU. After I downloaded the latest driver for GTX 980 fro the NVIDIA site, installed it and restarted, everything is fine. Looks like the CUDA installer is not installing the latest driver.