Just got an MSI GP70 2PE Laptop. The laptop has an Nvidia 840m and I need to utilize the GPU for my work. I've tried following the instructions (posted here: http://ubuntuhandbook.org/index.php/2014/06/nvidia-driver-337-25), but when I get to the login screen there is a crash report prompt and I am unable to do anything else (I can CTRL+ALT+F1 and get a working terminal, but that's it). I've also tried skipping over the install of nvidia331-updates-dev and just using the .run file downloaded from Nvidia, but that causes the same issue. Any ideas on what could be happening?
Note that a fresh install of Ubuntu works fine. However, when I do boot into that, just before the login screen appears I see a two line message starting something about 'nouveau unknown chipset'.
Also, under the Addition Drivers dialog it simply states "No proprietary drivers in use".
Here is a copy of my Xorg.0.log: http://textuploader.com/okaq