I needed to install ssh-server on my machines. One is Ubuntu 9.04 and the other is Ubuntu 8.10.
This installation prompted me for several automatic updates, things like bind, (I didn’t keep track of them all). When these were installed, a restart was required.
After the restart, the nVidia driver will no longer load, on either machine. The displays appear to already have an X server running on :0 when I start the machine, so I have to run in degraded graphics on :1.
None of my CUDA code will run now either. (Which stands to reason if the driver won’t load).
I searched this forum for threads with similar problems, but didn’t find any.