Originally Posted by Stephen Warren
This error covers a number of fatal initialization problems, such as not finding the driver library, not finding valid hardware, or an unsupported configuration, etc..
Do OpenGL applications run correctly for you?
Given your HW configuration, I'd guess the most likely issue is that you're running Xinerama?
OpenGL applications run correctly...
Xinerama not running...
all library installing correctly...
OpenGL renderer string: GeForce 8400M GS/PCI/SSE2
OpenGL version string: 2.1.2 NVIDIA 180.06