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 had very similar problem on Debian and it turns out that loaded nvidia module had different version than libcuda1.

To check for installed nvidia module you should do:

  $ sudo modinfo nvidia-current | grep version
  version:        319.82

If it doesn't match version of libcuda1 this the root of your problems.