Will Kubuntu 12.04 run on 256 MB Ram?
Solution 1:
As on Wikipedia: Kubuntu, you need 384MB RAM for minimum requirements. If you still install it on your laptop, it can't works.
Why you didn't try the other derivative of Ubuntu like Xubuntu or Lubuntu? Two of them works on smaller RAM. (Note: Xubuntu 12.04 minimum requirements is 512MB, but Xubuntu 11.04 or 10.04 needs 256MB to works)