After installing Ubuntu 11.10 on my desktop the second display was disabled by default. I enabled it in the nVidia Xserver settings page but couldn’t save the configuration file. I was getting the message Failed to parse existing X config file ‘/etc/X11/xorg.conf’!, I resolved this by doing the following.
- open a terminal
- sudo mv -i /etc/X11/xorg.conf /etc/X11/xorg.conf.backup
- sudo touch /etc/X11/xorg.conf
- sudo nvidia-settings
- Hit “save configuration”