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[CShadowRun <signup+launchpad@xxxxxxxxxxxxxx>]

I found out more specifically what the problem is, and a workaround.
The nvidia-xconfig utility doesn't specify a BusID in the device section. So when X starts, it doesn't know which graphics card to use, and this somehow results in "No screens found". The solution, open a terminal and type...

$ lspci | grep VGA
03:00.0 VGA compatible controller: nVidia Corporation GeForce 8800 GT (rev a2)
04:00.0 VGA compatible controller: nVidia Corporation GeForce 8800 GT (rev a2)

>From this you can see my BusID's are 3:0:0 and 4:0:0

$ gksudo gedit /etc/X11/xorg.conf

Find your "device" section and add

BusID "PCI:3:0:0"

Replace PCI:3:0:0 with the BusID you got from lspci earlier.
Save, restart, all should be well now :)

** Changed in: nvidia-graphics-drivers-180 (Ubuntu)
       Status: Invalid => Confirmed

-- 
Hang on Checking battery state [OK] after installing graphics drivers
https://bugs.launchpad.net/bugs/367078
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