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 came across this issue, and running

nvidia-smi

informed me of an API mismatch. The problem was that my Linux distro had installed updates that required a system restart, so restarting resolved the issue.