Hi Floating Dutchman.
I don't know why I always say this, but I do: I am NOT a Linux guru. As a matter of fact, I may not even be able to help you. I'm just a guy that's dinked around with computers for a while. So I'm sorry if I ask you to do X, Y, Z, A, C... and end the whole mess with "I don't know". So PLEASE don't put a whole lot of faith in me, I'm just here to give this my best shot. :)
First, you say that you have an old computer with Ubuntu on it. For me to get a better feel of the situation, could you please tell me the system specs? Such as the type and speed of the components? (if you don't know all of it, that's fine, just throw me whatever you've got.) Also, do you have a graphics card? This is very important to know. That 15 pin lead you were talking about, that is a VGA cable, right? Which version of Ubuntu do you have (and is it 32 or 64 bit? I know that an old computer will probably be 32 bit if not 16 bit, but to be frank, one user's version of old is not that same as another.)
Well, that's all the questions I need to ask for today. Get back to me when you can and I'll see what I can do. And, by the way, you missed a WHOLE lot: fixing a bug in Linux is never easy. LOL