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I have installed ubuntu 9.10 on my laptop.
In System->Display, the best resolution I allow me to use is 1280x700. But my laptop can support 1600x900.
So how can i change it? I tried adding
xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
and in /etc/gdm/Init/Default
But that does not help.