How To Change GDM Login Display screen Background In Ubuntu


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Everytime you log in or lock and unlock your Ubuntu 18.04 LTS desktop, you can be greeted with a plain purple-colored display. It’s the default GDM (gnome desktop supervisor) background since Ubuntu model 17.04. A few of you could really feel boring to take a look at this plain background and wish to make the Login display one thing cool and eye-candy! In that case, you’re heading in the right direction. This transient information describes learn how to change GDM Login display background in Ubuntu 18.04 LTS desktop.

Change GDM Login Display screen Background In Ubuntu

Right here is how the default GDM login display background picture seems like in Ubuntu 18.04 LTS desktop.

GDM login screen 1

GDM login display with default background

Whether or not you prefer it or not, you’ll stumbled upon this display each time you log in or lock and unlock the system. No worries! You may change this background with any lovely picture of your selection.

Altering desktop wallpaper and consumer’s profile image is just not an enormous deal in Ubuntu. We will do it with a number of mouse clicks very quickly. Nonetheless, altering Login/Lock display background want a bit of bit modifying of a file referred to as ubuntu.css situated underneath /usr/share/gnome-shell/theme listing.

Earlier than modifying this file, take a backup of this file. So, we will restore it if one thing went mistaken.

$ sudo cp /usr/share/gnome-shell/theme/ubuntu.css /usr/share/gnome-shell/theme/ubuntu.css.bak

Now, edit ubuntu.css file:

$ sudo nano /usr/share/gnome-shell/theme/ubuntu.css

Discover the next strains underneath the directive named “lockDialogGroup” within the file:


Enhancing ubuntu.css file

As you possibly can see, the default picture for the GDM login display is noise-texture.png.

Now, change the background picture by including your picture path. You need to use both .jpg or .png file. Each format photos labored high-quality for me. After modifying the file, the contents of file will appear like under:


Please pay little consideration to the modified model of this directive within the ubuntu.css file. I’ve marked the adjustments in daring.

As you might need observed, I’ve modified the road “…url(useful resource:///org/gnome/shell/theme/noise-texture.png);” with “…url(file:///residence/sk/picture.png);”. I.e You must change “…url(useful resource…” to “…url(file..”.

Additionally, I’ve modified the worth of “background-repeat:” parameter from “repeat” to “no-repeat” and added two extra strains. You may merely copy/paste the above strains and alter picture path with your individual in your ubuntu.css file.

As soon as you’re finished, save and shut the file. And, reboot your system.

Right here is my GDM login display with up to date backgrounds:

Up to date GDM login display

Up to date GDM login display

Cool, yeah? As you possibly can see, altering GDM login display is just not that troublesome both. All it’s important to do is to alter the trail of the picture in ubuntu.css file and restart your system. It’s easy as that. Have enjoyable!

You may also edit gdm3.css file situated underneath /usr/share/gnome-shell/theme listing and modify it as proven above to get the identical consequence. Once more, don’t neglect to take the backup of the file earlier than making any adjustments.

And, that’s all now. Extra good stuffs to come back. Keep tuned!


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