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            URL: 
              https://askubuntu.com/q/1155300
          
          
            
            Title: 
              Log-in screen background (on Ubuntu 18.04) is not changing though I made necessary changes in necessary files
            
          
          
            ID: 
              /2019/07/01/Log-in-screen-background-_on-Ubuntu-18.04_-is-not-changing-though-I-made-necessary-changes-in-necessary-files
            
          
          
            Created: 
               July  1, 2019
          
          
          
          
            
            Upload: 
              October 19, 2025
          
          
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The technique you followed has worked for most people:
However it didnβt 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
β¦.# 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 # rebootβ¦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.