Re: NVIDIA-Linux-x86-100.14.09 on Feisty fawn
Make fresh nvidia-bug-report.log and view it with your favorite text editor.
Search for 7184 text to make sure you deleted all old driver files.
If inside nvidia-bug-report.log you still find 7184 text this means the old driver is still inside system. Usually package manager allows to remove Nvidia driver. If you have an uninstall tool look for packages with NVIDIA name. They usually has NVIDIA-glx NVIDIA-driver or something like that. Then check version of such package and uninstall it if this is 7184.
Look at ENVY tool maybe there is any way to deactivate old Nvidia driver.