I've had the same problem. My work around was to drop to tty from the login prompt (clicking the login window corrupted and froze the system) and then remove the current nvidia drivers:
sudo apt-get purge nvidia-glx-*
Install the latest:
sudo apt-get install nvidia-glx-185
and then run nvidia xconfig
nvidia-xconfig
After a reboot everything worked.
I've had the same problem. My work around was to drop to tty from the login prompt (clicking the login window corrupted and froze the system) and then remove the current nvidia drivers:
sudo apt-get purge nvidia-glx-*
Install the latest:
sudo apt-get install nvidia-glx-185
and then run nvidia xconfig
nvidia-xconfig
After a reboot everything worked.