Post
by desertcat » 2018/05/08 06:18:27
OK this might be a shot in the dark, but IF you are getting a BLACK SCREEN try this:
Hit Ctl+Alt+F2 that *might* get you to a login prompt. Login to your USERS ACCOUNT + PASSWORD then type startx, and then you *should* be able to see your GUI.
If that is the case then try this: Reboot the machine until you get back to the BLACK SCREEN => hit Ctl+Alt+F2 only this time Login as root => Type in your root PASSWORD now do the following:
Type:
1) systemctl stop display-manager
2) systemctl disable [name of last Display Manager
3) systemctl enable [name of NEW Display Manager]
4) systemctl start display-manager
I just went through this with the cr release of CentOS 7.5. CentOS 7.4 had issues with gdm which set off a run away process that ate up my /var partition so I installed sddm which fixed the problem. With CentOS 7.5 RH *seems* to have done something that has broken sddm, so on a hunch I reversed the process and reinstalled gdm. It worked!!! Waiting for the OFFICIAL rollout of CentOS 7.5 when it hit the mirrors to see if it is going to screw up sddm, but if it does, I at least now know how to fix the problem (though I'm not happy about it).