Ubuntu :: Cannot Locate Mouse By Holding Ctrl Key

I currently use a laptop (win vista was the original OS) and I decided to get rid of it. So I tried Ubuntu, bam, no pointer, I changed yesterday for Kubuntu and the same problem goes on, invisible pointer. The mouse is perfectly working it's just I can't see it on the screen. To get even worse and make me want to throw my computer through the nearest window, with kubuntu I can't use the same trick as with ubuntu, I mean I can't locate the mouse by holding the 'ctrl' key.

It's a very common problem with VIA/3 chipsets (which is the one I have) and I also read it's often a bug with OpenChrome and to fix it I may have to modify the xorg.conf. But here's another issue, my xorg.conf file isn't in the same folder as for most of the people: instead of being in /etc/X11/xorg.conf, it's in /usr/share/X11/xkb/rules/xorg.conf, and, which is most, it ain't even named xorg.conf but xorg! Besides, I can't modify the file to enter a command that may be a solution because when I try to save my modifications, it tells me I haven't the permissions and I can't get it to run in root.