It was recently that I noticed it was not possible to install the Ndivia GTX 750Ti driver as outlined in step 5 of my blog titled ‘How to Install Nvidia GTX 750Ti Driver on Linux Mint 17.2 (Rafaela)’. I did not realize it at that time the blog was written, but attempting to install using the Driver Manager on a 64-bit Linux Mint 17.2 only resulted in failure when the ‘Apply Changes’ button was clicked. Although the ‘nvidia-346’ item was selected, upon clicking the ‘Apply Changes’ button, the only thing that happened is that the green progress bar briefly appears and the ‘xserver-xorg-video-noveau’ item was re-selected. Note that the message ‘1 proprietary driver in use’ will not appear. No other messages indicating what sort of problem it was, appeared – one of the few shortcomings of Linux Mint 17.2.
It was only after the above-mentioned discovery that I had a 'DOH' moment – I had forgotten to document the installation of the 32-bit architecture to the repository prior to installing the driver. Why is this required, you may ask. The short answer is that the Nvidia driver requires it.
To make a long story short, I had to edit the blog concerned to include the installation of the 32-bit architecture to the 64-bit repository and then updating it. This is, however, only applicable to a 64-bit Linux Mint 17.2 installation – you can safely ignore it for 32-bit installations.