I had vostro 1500model laptop.I installed 8.04 and now keypad scrolling is not working .I was able to scroll thr mouse but not through keypad...plz tell hw 2 solve this

One more prob..All Keyboard shortcuts(which use ctrl) were not working (copy ctrl+c, paste ctrl+v) .But i am able to select multiple items through ctrl and mouseclick(so i guess there is no prob with my ctrl button).What can i do???plz help..