If my Ubuntu 14.04.4 (3.13.0-85-generic) computer has driver version 364.19 installed I get the following error after launching a process from NVIDIA Linux Graphics Debugger:
[myappname] NGD: Starting GTI initialization…
[myappname] Found libGL.so.1 but it does not appear to be an Nvidia driver library.
[myappname] NGD: Fatal Error: Cannot find any system GLX library.
[Status] Searching is canceled.
[Status] Target process exits.
I believe that this problem was also present with the Vulkan beta version: 364.12.
If I have the latest Long Lived Branch (version: 361.42) installed on the same computer I do not have this problem.