I have this issue as well. I was running a custom 3.17 kernel with the Nouveau driver and then reverted back to 3.13. When I tried to switch back to the nvidia driver in 3.13 using the Software & Updates tool I got this error.
I have this issue as well. I was running a custom 3.17 kernel with the Nouveau driver and then reverted back to 3.13. When I tried to switch back to the nvidia driver in 3.13 using the Software & Updates tool I got this error.