1. Open terminal2. Run ‘su
3. Now we have to change two files for login as root from GUI
4. Run these following commands in terminal.
# gedit



Save this file and close the gedit.
Now edit second file with this following command, run this command in terminal.
#gedit
Note: Please remember that all the commands and filenames in the linux are case-sensitive, hence write the command and filename as it is as appear in this guide. Don’t change the case.
It will open the file as shown below.
Again comment the 3rd line with a # sign as shown below.
Now save the file and close it. Then close the terminal and restart the computer.
After restart at login screen select other option as shown below.
After click on other it will ask for username write it root. And click login then enter your root password which you provide at the time of installation of fedora.

Note: It is highly recommended not to use the GUI mode of root account, use this mode only in extreme case or if you are expert user of Linux.