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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.

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2 Answers 2

Reset to default
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I've had this problem in the past as well. To fix it I just had to install some display drivers. To do this go to System —> Administration —> Hardware Drivers and see if there are any display drivers to activate.

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I just had a similar problem with an old Dell Latitude C600, and found this link to be the solution, so a similar method with different numbers in the resolution section would probably work. It didn't automatically use the native resolution after a reboot, but the option did then appear in the Display settings dialog.

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