On 03/26/2014 03:40 PM, m.roth at 5-cent.us wrote: > > I think you missed that part of my original post: no X. This box has two > Tesla GPUs, and my users are using them for heavy duty scientific > computing.... And my problem is that neither their programs, nor the > utility I use (I *think* it that it seems to be part of the CUDA toolkit - > I didn't set that part up) can enumerate them... meaning that they can't > see or use the GPUs. > > what is the error? For example if I run "CUDA Device Query" (example from cuda toolkit) I get the following error if the kernel module is not the version needed for the compiled version of cuda program (cuda toolkit 5.5 and nvidia kernel module 310.19 - installed from nvidia.com) #./deviceQuery ./deviceQuery Starting... CUDA Device Query (Runtime API) version (CUDART static linking) cudaGetDeviceCount returned 35 -> CUDA driver version is insufficient for CUDA runtime version Result = FAIL -- Lec