Here is a simple tip for the ones that have nvidia card like me and see no VGA or LVDS related output at the xrandr -q output at the terminal. Try nvidia-settings and choose xserver configuration and press detect. Then configure the the detected screen when the cable is plugged at the VGA output. It is possible to clone or extend the desktop screen.
Some may be thinking to change the xorg.conf file to managae these things but after hardy it seems screen related thing are done automatically by xorg that is why we dont see anymore the screen size and resolution option selection at the dpkg-reconfigure xserver-xorg. So if you really want to play with you xorg.conf at Hardy, back up it, because it may not be opened the next time you restart the xserver by giving the error no resume image found. At this time you may change to the other konsole envireonment by ctrl+alt+f2 and copy back your xorg file and reboot.
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