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Anything about Ubuntu, Centos, openSuSe and Fedora
Although Ubuntu might be installed and “just work” out of the box. There’s always something that needs to configure manually. Like example adding resolution to the default and configured for your monitor. I’ve encountered this scenario when I’m trying to setup the 16:9 screen mode for my Samsung LCD monitor. The optimum resolution as stated in the LCD manual is 1360×768 on 60Hz, and on my further research on the net, I end up configuring this way:
1. On your console type:
$> gtf 1360 768 60
which means resolution for 1360×768 on 60hz. Copy the modeline for that resolution, keep it in clipboard for awhile
2. Then backup your current xorg.conf first before modifying anything on that file.
$> sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.bkp
3. Then modify the /etc/X11/xorg.conf, paste the modeline settings for the 1360×768 resolution, your Section “Monitor” should now ended similar to this:
Section "Monitor" Identifier "Configured Monitor" Modeline "1360x768_60.00" 84.72 1360 1424 1568 1776 768 769 772 795 -HSync +Vsync EndSection
4. Then add that resolution to your current list of display modes. On your Section “Screen” add the following before the
EndSectionSubSection "Display" ... Modes "1360x768" "1280x1024" Virtual 2464 900 EndSubSection
5. Save the file and restart your desktop.
6. After the reboot, try to change the default resolution on System -> Preferences – > Display. The new resolution should be
now included in the list.