Comment 61 for bug 1268257

Even though the problem reported is of a DKMS module failing to build, my output with 'dkms status' shows that NVIDIA is properly installed:

$ uname -r
> 3.16.0-25-generic
$ dkms status
> bbswitch, 0.7, 3.16.0-24-generic, x86_64: installed
> bbswitch, 0.7, 3.16.0-25-generic, x86_64: installed
> nvidia-331-updates, 331.89, 3.16.0-24-generic, x86_64: installed
> nvidia-331-updates, 331.89, 3.16.0-25-generic, x86_64: installed
> nvidia-331-updates-uvm, 331.89, 3.16.0-24-generic, x86_64: installed
> nvidia-331-updates-uvm, 331.89, 3.16.0-25-generic, x86_64: installed
> virtualbox, 4.3.18, 3.16.0-24-generic, x86_64: installed
> virtualbox, 4.3.18, 3.16.0-25-generic, x86_64: installed

Also did some testing, and it didn't break the driver. I can switch from my Intel to NVIDIA with no problems and 3D programs run normally.