HOWTO : Screen resolution on Ubuntu 9.10

When your display cannot report the correct EDID (Extended Display Identification Data), your X will not work properly. Usually, it will display 800x600 resolution or lower although your display is 1024x768 or higher.



Step 0 :

sudo service gdm stop

sudo Xorg -configure

sudo service gdm start



Step 1 :

If your monitor is 1024x768 at 60Hz, you can go to the following site and calculate the modeline.



Calculator for video timings



Select standard "1024x768@60Hz" mode and press the Calculate button.



The modeline will be as the followings :



Modeline "1024x768" 65 1024 1048 1184 1344 768 771 777 806 -hsync -vsync



Copy and paste the captioned "modeline" to "Monitor Section" of ~/xorg.conf.new.



Step 2 :

sudo cp xorg.conf.new /etc/X11/xorg.conf



Step 3 :

Go to "System" - "preference" - "Display"



Choose "Yes" and select the desired resolution then save.



Step 4 :

Reboot your system or restart X.



If you are using nVidia display card, you need to do the following.



Step a :

Install the nVidia driver from "System" - "Administration" - "Hardware driver".



Reboot your system.



Step b :

sudo nvidia-xconfig



Step c :

gksudo nvidia-settings



Select the desired resolution and save to the configuration file.



Step d :

Go to "System" - "preference" - "Display"



Choose "No" and select the desired resolution then save.



Step e :

Reboot your system or logout and login again.



That's all. See you!