On 3/18/13 at 5:36 AM, email@example.com (J=C3=A1nos L=C3=B6bb) wrote:
>This is a Centos 6.3 machine with Mathematica 9.0 Home Edition. The >Cuda 5.0 toolkit with the 304.54 driver was installed. When I first >issued Needs["CUDALink`"], it downloaded lots of stuffs from some >Wolfram Server, although the cud a 5.0 driver was already installed. >It is true that not in the expected location, but the needed soft >links are all set at the right places. For example all samples from >cuda5 are compiled and those wo need just OpenCL 1.0 or 1.1 are >executing at the Linux prompt. So I am wondering why CUDAQ is >unable to tell a True.
When I encountered a similar problem, I used CUDAResourcesUninstall to clear things out then did CUDAResourcesInstall to set it back up. This cleared the problem for me. YMMV