I've been researching this topic a lot recently, and I've become rather confused by all the sources that exist for how to do this because they all seem to say different things. I was hoping someone could shed some light on my situation or at least point me to a correct source.
Currently I have a MSI GS 70 with an 970M. I'm running a new install of Kubuntu 14.04 LTS (with updates) and a quick run of lspci in the terminal doesn't even show that my graphics card exists. Currently its still using the Intel integrated graphics. I've tried installing the proprietary drivers from the nvidia website by disabling xorg and running the install script, but I keep getting "The preinstall script failed". I've also heard there are linux based open source drivers, but I'm confused onto how to go about trying to install them. I don't really care which one I use, so long as my computer can utilize the nvidia card. Any help one how I can get it to do this is appreciated.
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
01:00.0 3D controller: NVIDIA Corporation Device 13d8 (rev ff)
EDIT: For future reference, the software that will show if an nvidia gpu is working on a linux system is "Nvidia X Server Settings". It can easily be downloaded from the software center.
lspci -k | egrep 'VGA|3D' -A2
terminal command. And specify your Kubuntu version.ubuntu-drivers devices
will show nothing or worse suggests 331.