7 thoughts on - Changing Gdm Background

• depends on which CentOS you’re talking about. If C7, with Gnome 3, here’s one URL a little searching turned up:

  http://smashingweb.info/change-the-background-of-gnome-3-gdm-login-screen/
  or http://lukewickstead.wordpress.com/2010/12/12/how-to-change-background-gdm-3-and-grub-2-themes-in-debian-squeeze/

• Hi,

  Best way to-do this and one that is reversible if needed.

  – Open terminal.
  – Do: ‘cd /usr/share/gnome-shell/theme’
  – Do: ‘sudo cp -f noise-texture.png noise-texture.png.orig’
  – Pick a wallpaper that is ‘png’ and the same resolution as your screen.
  – Do: ‘sudo cp -f /path_to/my_image.png noise-texture.png’

  You may need to experiment with the size of the image to match your resolution.

  To reverse the changes:

  – Do: ‘cd /usr/share/gnome-shell/theme’
  – Do: ‘sudo cp -f noise-texture.png.orig noise-texture.png’
  – Do: ‘sudo rm -f noise-texture.png.orig’

  Regards

  Phil

• Side note:

  Why I say same resolution as screen is that the noise-texture.png that is used is smaller than the screen and then tiled. If you wished, you could create a funky smaller patterned image that will tile to make for a more consistent background. Hmm… something like a (hint hint) darker blue CentOS inspired look rather than the grey – god who chose drab grey. :-(

  Regards

  Phil

• Ok, I was bored waiting for a database to populate…

  As a test for the method in this thread after mentioning CentOS blue.

  http://picpaste.com/pics/screenshot.1405375477.png

  The image used can be grabbed:

  http://picpaste.com/pics/noise-texture-KjhU2rzp.1405375756.png

  Regards

  Phil

• You probably want to read over ->

  https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Desktop_Migration_and_Administration_Guide/customizing-login-screen.html

  and

  https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Desktop_Migration_and_Administration_Guide/customize-desktop-backgrounds.html#setting-default-background

  Essentially you just need to jam the right voodoo in a local dconf config file and ‘dconf update’.

• Actually, the first paragraph at your first link says:

  …. Note that the login screen background image cannot be
  customized.

  Pretty unbelievable. Hopefully kdm, lightdm, sddm, or even xdm will pop up in EPEL soon.

• Searching on Google turns up this:

  http://www.webupd8.org/2012/11/how-to-customize-gdm-36-login-lock.html

  and states that:
  ==>
  You can manually change the GDM 3.6 grey background image. The image used by default is located under /usr/share/gnome-shell/theme/ and is called noise-texture.png.

  Like its name says, the grey image used by GDM 3.6 is a pattern, but you don’t have to use a pattern and a regular wallpaper image works too. To change it, open Nautilus [or Dolphin file manager] as root:

  gksu “nautilus –no-desktop /usr/share/gnome-shell/theme/”

  then make a backup of the original “noise-texture.png” image and replace it with the image you want to use as a background for the GDM 3.6 login / lock screen.
  <= Cheers! Simba Engineering