Comment 15 for bug 222277

Nikola, make sure you have actually downloaded the file. Its possible that you had an incomplete download, or even were running a different version of the restricted drivers. This fix again only applies to the nvidia-glx-new drivers.

In the future you can always drop back to the X terminal (ctrl+alt+f1) and then link back the original library.

$ sudo ln -sf /usr/lib/xorg/modules/libnvidia-wfb.so.169.12 /usr/lib/xorg/modules/libwfb.so

instead of libnvidia-wfb.so.173.08

And your X should function as normal without having to reinstall the nvidia drivers.