cuda-gdb "No CUDA devices" but CUDA programs run

Accelerated Computing CUDA CUDA Programming and Performance
1

I’ve been trying to use cuda-gdb to debug problems with a simulation I’m running, but whether in X or booting straight to a command line, cuda-gdb doesn’t seem to recognize that there is a CUDA device and, hence, won’t step into device kernels, even though the program runs. What can I do to go about remedying this issue?

2

Do you have 2 GPU’s in the system? You cannot use cuda-gdb on the same device that is running the display.

3

There is only one gpu on the system, and I have this problem even when X is not started.

I’d also thought that when X is started, cuda-gdb should detect the gpu that is running X, even if it won’t allow programs to be debugged on it. Is that not the case?

4

I’m not certain as I’ve always had a second card running the display.

Have you compiled with the flags -g -G?

Justin