Black Screen!!! Stuck at certmonger package in CentOS 6.X

Problem:

After updating the CentOS machine it stuck at black screen and if check whether which package is failed to start,it hangs at certmonger package and doesn't get to the login screen. 

Resolution:

To resolve this issue, we have to reboot the machine and click any key when the below screen appears


Press e button to edit the commands before booting



Press e button again to edit the commands before booting


Add 1 in the end of the commands. To run the OS on level 1 mode.


 [root@localhost X11]#mv /etc/X11/xorg.conf  /etc/X11/xorg.conf_bak 

Reboot the machine. When the OS boots it will re-install the driver to rebuild the kernel module.


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