Comment 10 for bug 845549

Using Xubuntu Precise Pangolin Alpha2, The unity-greeter.conf still contains the entry:

[greeter]
background=/usr/share/backgrounds/warty-final-ubuntu.png

Wth my nvidia graphic card, the greeting screen flashes with the grid and then goes blank. The login screen is fully functional but one is working blind. My graphics driver is nvidia-current.

Commenting out the line or removing it corrects the problem