Edited the first post, I think Xorg.0.log is now the right one.
Module glx: vendor="NVIDIA Corporation"
compiled for 4.0.2, module version = 1.0.9746
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 0.1
Edit: I don't really know where to find and how to use nvidia-bug-report.sh
in my case.