Dear Friends, this article will teach you, how add new resolution value to your list of Resolutions
1. Goto Terminal 2. Give command : xrandr then you will see a result like the screen shot given below..
3. then give the resolution with cvt command which you want to add like this, command : cvt xxxx xxxx (eg in my case : cvt 1024 800) then you will see a result like the screen shot given below...
4. then copy(shift+ctrl+c) the part "1024x800_60.00" 66.75 1024 1080 1184 1344 800 803 813 831 -hsync +vsync" and paste it with the xrandr --newmode command like the code given below.
5. then give command : xrandr --addmode <output> <name>
eg: xrandr --addmode default 1024x800_60.00. ....
6. then give again command : xrandr now you can see new resolution in the list.
7. then you can add new resolution with GUI by System -> Preferences -> Display or with the terminal command : xrandr --output default --mode 1024x800_60.00
If it is not applied, restart the mechine and change the resolution to new value with System -> Preferences -> Display ...