On Thu, Jul 7, 2016 at 2:00 PM, Hersh <parikhh1 at gmail.com> wrote: > Hi Venkata, > > Can you please let me know the steps which you have followed for > re-installing the GNOME? I am having a similar problem on one of our > system. > To my understanding, when you install centos-7 with options ServerGUI or GNOME Desktop and leave the system for long time locked, you will notice that CentOS slips into textual interface mode and you will not be able to get GUI which means, you can login to the system and cannot see GUI screen. I have found the following steps on google, which helped me get through this problem systemctl disable gdm.service systemctl enable lightdm.service systemctl set-default graphical.target First command was successful, second one error'd out. Not sure what to do, i reverted back the first command and executed the third command and rebooted. All worked fine ! Below is the log - [root at buildhost ~]# systemctl disable gdm.service Removed symlink /etc/systemd/system/display-manager.service. [root at buildhost ~]# systemctl enable lightdm.service Failed to execute operation: Access denied [root at buildhost ~]# systemctl disable gdm.service [root at buildhost ~]# systemctl enable gdm.service Created symlink from /etc/systemd/system/display-manager.service to /usr/lib/systemd/system/gdm.service. [root at buildhost ~]# systemctl set-default graphical.target Removed symlink /etc/systemd/system/default.target. I think, the last command made sense to me. Regards, VB