I upgraded from Kubuntu 7.10 to Ubuntu 8.10 this morning.
This was via a fresh installation into a new partition.

Getting it running went fairly smoothly but trying to get the NVIDIA drivers working was a world of pain.
It seemed that no matter what I tried I always got the following error:

Failed to load the NVIDIA kernel module

Every tip and bit of advice I found online didn’t work.

It turns out that the linux kernel headers aren’t installed by default but are required by the…