laptop number keypad not working

I have an HP laptop about a year and a half old.  I recently installed Ubuntu on it.  Then it would randomly freeze and I would have to reboot.  Now the number keypad will not work, including the 'home,' 'end,' 'pageup,' and 'pagedown' buttons.  Is this a hardware problem or a software problem and how would I fix it?

Tags: Ubuntu Hardware
user image Author :   decotamed