Originally Posted by NvFuchs
Remove the manually installed and the ubuntu driver,
read the sticky thread on how to install recent drivers
on recent distributions, follow the instructions, try again
and if it still doesn't work: provide a bug report file.
Your problem is the restricted driver manager used in Ubuntu. You have two options,
1) Use the driver manager to install the NV binary driver....preferred if possible.
2) Read the sticky already pointed out to you on how to install it by hand. This removes or disables the driver manager.