[wlug] Backports

Hello All, I am running Karmic Kooala Kubuntu 9.10 Recently I added the back-ports repository to install the latest version of Digikam and Amajoke, I mean Amarok. Well they both installed and then the update manager told mean about all the latest KDE goodness I could install so I upgraded. Well KDE-plasma now likes to hit 80-90% CPU usuage and is wearing out my cooling fans. Can I go back to a non-backports version of my machine? I still want ultimately to have the latest version of Digikam but revert everthing else, including Amarok to version 1.4 again. Is it a matter of disabling the backport repo and doing 'sudo apt-get upgrade' ? Any thoughts? Chris