The cube was working on livecd but doesn on install, now what?
There is several ways to do this. When you’re on the login screen, click the Sessions box and select Acceleration Manager. Another way is to look for Acceleration Manager in the Kmenu. Another method is to open konsole and su to root and run the command accel-manager. Whatever method you use will bring up a box for you to make your selection. After you make your selection you need to restart X so it can take effect. To restart X you can simply ctrl alt backspace or issues the command /etc/init.d/xdm restart. Upon login back in, you should now have wobbly windows and a cube.