Cuda2.1 and Cuda2.0 give different results for cudaDeviceGetProperties on non-cuda machines

Accelerated Computing CUDA CUDA Programming and Performance
1

Cuda2.1 and Cuda2.0 give different results for cudaDeviceGetProperties on non-cuda machines

Under 2.0 on a non-cuda machine, I would get -

devices = 1

deviceProp.major = 9999
deviceProp.minor = 9999

Under 2.1 on the ‘same’ non-cuda machine, I get -

devices = 1

deviceProp.major = 4
deviceProp.minor = 4229796

I get these numbers consistently so far. I also tried it on a different machine and a virtual machine to get the same numbers.
All cases, the cudaDeviceProperties does return with cudaSuccess.

I used these numbers to detect whether I should use my cuda kernels or not. With this change, I cannot do so anymore and my application breaks. What is the new way of detecting whether cuda-hardware is present in the system?

Is this going to change again?

Thanks in anticipation!