I have (remote) access to a pretty powerful machine: i7/128GB RAM/2X Titan-X 12GB GPU/ Ubuntu 14.04, but when I try to use it to render any scene with Cycles (Blender 2.69/2.71) using GPU Compute all I get a checkerboard fully transparent render (similar to this post).
There are no errors in the "info" screen and in the top of the render view it says: "Frame 1| Time 00.00.25 |Mem:26.35M ,0.00M Peak 34.28M".
Unlike the post in the link, this is clearly not a GPU RAM shortage problem.
I'd appreciate any help here - even an educated guess can help me at this point, thanks!