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HowToFixScreenResolutionInUbuntuLinux

• Run the following commands:

   sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.custom
   sudo sh -c 'md5sum /etc/X11/xorg.conf > /var/lib/x11/xorg.conf.md5sum'
   sudo dpkg-reconfigure xserver-xorg

• Reference:

https://help.ubuntu.com/community/FixVideoResolutionHowto

http://ubuntuforums.org/showpost.php?p=129379&postcount=21

Section "Screen"
        Identifier      "Default Screen"
        Device          "Xdebconfigurator Card"
        Monitor         "Xdebconfigurator Monitor"
        DefaultDepth    16
        SubSection "Display"
        Modes           "1920x1440" "1856x1392" "1792x1344" "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480" "640x400" "320x400" "320x200"
        EndSubSection
EndSection