Comment 126 for bug 186382

Tom: please follow the instructions:

1) Uninstall the nvidia driver

2) Remove the wrong wfb.so:
sudo rm /usr/lib/xorg/modules/libwfb.so

3) Reinstall xserver-xorg-core (so as to restore the original libwfb.so):
sudo apt-get install --reinstall xserver-xorg-core

4) Install the nvidia driver from -proposed