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How I can change the GDM 3.6 Wallpaper? I dont mean the desktop background, but the Wallpaper at the login (GDM 3.6).

Thanks


Thank you for your answer,

I know exactly what you mean. Recently I had installed LightDm, but today I uninstalled it, and replaced it with GDM. Ubuntu-Tweak dont show the login screen appearance button. I think it's because LightDM is currently not installed. Does anyone know where is the folder where the images are stored?

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I can't believe this isn't a duplicate, but I just spent 10 minutes searching and nothing... +1 then, hope you get it sorted. –  Tom Brossman Oct 17 '12 at 18:31

3 Answers 3

I just went exploring. Check out /etc/gdm/greeter.gsettings

In the terminal, you can get READ access to this file by typing:

$ nano /etc/gdm/greeter.gsettings

You'll see in that file a reference to: /usr/share/themes/Adwaita/backgrounds which appears to hold the stripe backgrounds you're looking for. Good luck!

Remember, you'll need to elevate using sudo to write to this directory. Or if you would rather use the graphical interface, you can type this in the terminal to open up gedit as an elevated user, but be careful not to wreck your system:

$ gksudo gedit /etc/gdm/greeter.gsettings

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You will need Ubuntu Tweak, if you do not have it already you can install it by running the following codes in the terminal.

sudo add-apt-repository ppa:tualatrix/ppa
sudo apt-get update
sudo apt-get install ubuntu-tweak

Then launch Ubuntu Tweak and search for "login" in the search bar then click on "login settings" then press the unlock button in the top right by the search bar. Then you can edit your login screen as you choose by changing the background or Icon theme ect.

enter image description here

This should work for both GDM login as well as LightDM.

Source: http://www.techdrivein.com/2011/01/how-to-change-gdmlogin-screen.html

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1  
This does not work for GDM(3). –  Tommy Brunn Oct 31 '12 at 20:05
    
Looked promising, but not working for me on ubuntu 13.04 –  wim May 1 '13 at 4:33
    
trying this instead github.com/Nano77/various/tree/master/deb –  wim May 1 '13 at 4:39
  1. Copy the image you want to use into the /usr/share/gnome-shell/theme folder

    sudo gedit /usr/share/gnome-shell/theme/gnome-shell.css
    
  2. Search for the following section

    #lockDialogGroup {
    background: #2e3436 url(noise-texture.png);
    background-repeat: no-repeat;
    
  3. Change the name of the image to your image

  4. Set background to repeat or no-repeat

  5. Save the file

Logout and your new background is there

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