Hello to all,
In order to have CUDA running properly in Ubuntu 9.04 (or Kubuntu 9.04), try to use the following drivers and SDK:
cudatoolkit_2.2_linux_64_ubuntu8.10.run or cudatoolkit_2.2_linux_32_ubuntu8.10.run
Also, set the following environment variables in ~/.bashrc:
Hope it helps. I wasted all my day trying to figure out why the 2.3 version that NVIDIA released do not work in my system. If someone was able to run the 2.3 version on Ubuntu 9.04, please post here.