This is most probably an issue with the nvidia driver. Still, Kubuntu 8.04 comes with a feature called bulletproof-X which means that even if the nvidia driver is stupid again and wants to stop you from using KDE, X will fallback to either nv or vesa (i.e. lowlevel) so you have basic functionality to restore some backup etc.
This is most probably an issue with the nvidia driver. Still, Kubuntu 8.04 comes with a feature called bulletproof-X which means that even if the nvidia driver is stupid again and wants to stop you from using KDE, X will fallback to either nv or vesa (i.e. lowlevel) so you have basic functionality to restore some backup etc.