Background

Yesterday, I installed CentOS v7 on a refurbished box.  I went with the “Server with GUI” option, but upon starting up for the first time, the usual login screen is not coming up.

I have a dull blank screen, rather than one that lists my username.

Remediation

Idea

Took to the net and found a few people had similar problems.  The most widely promulgated option is to edit the /etc/default/grub configuration file and look for the “GRUB_CMDLINE_LINUX” entry.

And, go on to add “video=LVDS-1:d” to the end of the current contents of the entry.

Steps

Outline

1. Access Terminal window via pressing the key combination CTRL-ALT-F2
2. Login from the terminal by entering the username and password
3. The configuration file /etc/default/grub is read only and so change the file to writable
4. Edit in vi or your choice editor as sudo
   • Look for the “GRUB_CMDLINE_LINUX” entry and add “video=LVDS-1:d” to the end of the current value.
5. Reconfigure using grub2-mkconfig
6. Reboot your computer

 

Details

Here are the steps in detail.

CTRL-ALT-F2

Access Terminal mode by pressing the key combination CTRL-ALT-F2.  The Terminal Screen should appear.

 

Logging from the Terminal

Logging from the Terminal by entering your username and password.

 

Launch vi in sudo mode

sudo vi /etc/default/grub

 

Edit /etc/default/grub

Add ” video=LVDS-1:d“

Before

Add

Reconfig Grub

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

Reboot

reboot

Credit

No original thoughts here!

Credits go out to the guys ( scubastevesama) who spoke about it on Reddit.

And, the ones ( Josef Holland ) who blogged about it.

References

CentOS Login Screen

1. centos 7 installation issue, no login screen – scubastevesama
   Link
2. Josef Holland – Disable Laptop LCD Completely on boot
   Link
3. [RESOLVED] Atom D510 – 6.0 updated to 6.1 – became confused about monitor configuration
   Link
4. Install on a laptop with external monitor only
   Link

 

Editing /etc/default/grub

1. Amanda Folson – Modify File Permissions with chmod
   Link
2. I need to change the Read Only in gedit to Read/Write
   Link