"All CUDA-capable devices are busy or unavailable" with recent drivers


I’m experiencing problems with latest drivers (320.18), all CUDA applications fail to start (error mentioned in the subject appears).

On the other hand, everything seems to run normally with 314.22.

Brief googling showed that many people experience same problems with different dirvers under different OS’s. I’d like to migrate to the latest drivers as they provide CUDA 5.5 support, however, nothing works with them.

How is it possible to solve this issue ?

Thanks in advance.