The issue is not with the dual boot setup.

The issue is that the open source driver (nouveau) for the graphics card (nVidia Quadro K2100M with nVidia Optimus) is causing this freezes.

To have a quick workaround I disabled nouveau and related modules like advised on this [AU question][1] and [answer][2].

**/etc/modprobe.d/blacklist-nouveau.conf**

    blacklist nouveau
    blacklist lbm-nouveau
    blacklist amd76x_edac #this might not be required for x86 32 bit users.
    blacklist vga16fb
    blacklist rivafb
    blacklist nvidiafb
    blacklist rivatv
    options nouveau modeset=0
    alias nouveau off
    alias lbm-nouveau off

Next ist to build the [original nVidia driver for my graphics card][3] and install it.


  [1]: https://askubuntu.com/q/481414/68277 "Install Nvidia driver instead nouveau?"
  [2]: https://askubuntu.com/a/481540/68277
  [3]: http://www.nvidia.com/download/driverResults.aspx/114708/en-us "NVIDIA Quadro K2100M Linux x64 (AMD64/EM64T) Display Driver v375.39 2017.02.14"