Re: 100.14.11 and geforce 7025
You already have Twinview. As I noted earlier, there are an infinite number of X configurations. You're just not getting the configuration that you want.
Move /etc/X11/xorg.conf to a safe backup location, and then run the following as root:
If you need further assistance after running the above command, please describe the problem, and attach a new bug report.