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Actually the instructions for changing the log-in screen background are very clear and distinct. So, I don't think I made anything wrong. First I copied my desired image here /usr/share/backgrounds/drawing.png. I opened this ( /usr/share/gnome-shell/theme/ubuntu.css ) as a super user and I replaced

#lockDialogGroup {
background: #2c001e url(file:///org/something_path);
background-repeat: repeat;
}

with this

#lockDialogGroup {
background: #2c001e url(file:///usr/share/backgrounds/drawing.png);
background-repeat: no-repeat;
background-size: cover;
background-position: center;
}

and saved successfully. Then I rebooted but the background is not changed. But when I put anyother color code instead of #2c001e the color gets changed. Please help me to understand what and why is wrong with the changing of background image?

f4him
  • 137
  • 9

1 Answers1

1

The technique you followed has worked for most people:

However it didn't work for everyone and there is a lesser known technique in the same thread where they simply copy over the pre-packaged image filename with a new image:

I tried all of those and none worked. This does, for sure:

As root user, just copy your_image.png to /usr/share/backgrounds and ....

# cd /usr/share/backgrounds
# cp warty-final-ubuntu.png warty-final-ubuntu.png.stock
# rm warty-final-ubuntu.png
# ln -s your_image.png warty-final-ubuntu.png
# reboot

...where your_image.png is the name of the actual image you want to display. The warty one is big: 4096 x 2304. I matched mine to the same size.

WinEunuuchs2Unix
  • 102,282