I basically followed the procedures in CUDA_Getting_Started_Linux.pdf installing cuda 7.0 on Ubuntu 14.04, until i decide to run deviceQuery under ~/NVIDIA_CUDA-7.0_Samples, it shows:
./deviceQuery Starting... CUDA Device Query (Runtime API) version (CUDART static linking) modprobe: ERROR: could not insert 'nvidia_331_uvm': Invalid argument cudaGetDeviceCount returned 30 -> unknown error Result = FAIL
When I installed cuda, it showed that driver, toolkit, samples are all correctly installed. The driver it installed is nvidia 346.46, but it showed something about “nvidia_331”, which is the old video driver I used before installing cuda. So i figured it might be due to the driver is not configured yet? Also there does not exist /dev/nvidia* folder on my machine. Could someone help me with this? Thank you.