After scouring the forum here trying different methods to get my 22" 220SW9FB Widescreen 1680 x 1050 monitor resolution to stick and work on 8.10 Ubuntu Intrepid Ibex i finally found one that worked and i wanted to share my solution.

Chipset i865, Integrated Graphics Intel X3000

In the end it was Driver, HorizSync and VertRefresh options in xorg.conf that enabled all available resolutions for my monitor. I had to add them all.

Original post that i used for reference +resolution&page=1

Remember to create a backup of xorg.conf before making changes!

Command to edit xorg.conf
gksu gedit /etc/X11/xorg.conf
Copy of my current xorg.conf
Section "Device"
        Identifier      "Configured Video Device"
        Driver  "intel"

Section "Monitor"
        Identifier      "Configured Monitor"
        HorizSync 30-83
        VertRefresh 56-75
        Option "dpms"

Section "Screen"
        Identifier      "Default Screen"
        Monitor         "Configured Monitor"
        Device          "Configured Video Device"
Hopefully this will work for others.