I thought it would install itself properly since it offered me Nvidia drivers after fresh system installation. It did not.
How to make Nvidia Optimus work on Kubuntu 15.10
drivers;nvidia;kubuntu;optimus
Here is a step-by-step guide for what I did to make Nvidia Optimus work on Kubuntu 15.10 64-bit. Note that I describe the user friendly way because it's meant for all users to be able to do it.In the Device Manager choose the recommended driver, in my case nvidia-352If you don't have it already, in Muon Discover find Muon Package Manager and install itStart Muon Package Manager, type nvidiaMake sure all of the following packages are installed, as you will probably have to install some of themFrom the menu start Konsole and type sudo kate /etc/bumblebee/bumblebee.confChange the following linesDriver=toDriver=nvidiaandKernelDriver=nvidia-currenttoKernelDriver=nvidia-352andLibraryPath= Sorry I don't remember what was theretoLibraryPath=/usr/lib/nvidia-352:/usr/lib32/nvidia-352andXorgModulePath= Sorry I don't remember what was theretoXorgModulePath=/usr/lib/nvidia-352/xorg,/usr/lib/xorg/modules Reboot  From menu start Konsole and type optirun steam if you play games via Steam  Enjoy!