Failed To Start The X Server - Linux Display Error

When I changed Linux system Monitor I got the following Error message while booting Graphical User Interface.
Failed to start the X server (your graphical
interface). It is likely that it is not set
up correctly. Would you like to view the X
server output to diagnose the problem?
- Yes

PROBLEM: When We changed Linux System Monitor the old screen resolution it is not supporable for New Monitor.Becuase Both Monitor Size is Different.

SOLUTION:Change the screen Resolution. Which is adoptable for New Monitor.
Log file: /var/log/xorg.o.log
Config File /etc/X11/xorg.conf

Then I got the following Message Box
"Would you like to try to configure the x server? Note that you will need the root password for this. "I Enter yes.
Finally it will open the "Display setting"- Here we can configure the New screen resolution According to the New Monitor.

Related post