Ubuntu – How to change lock screen background Ubuntu Mate

16.04lightdmmate

I would like to change the lock screen background in Ubuntu Mate 16.04. I have found out how to change the background for unity by changing the com.canonical.unity-greeter setting but I can not find the corresponding setting for Mate 16.04. I'm not sure if this is a problem in 15.10 as well but I could find no reference to it. I spent some time going through different settings through gsettings to no avail.

Best Answer

for Ubuntu MATE 16.04 try the following:

  1. Open a terminal ( [Ctrl] + [Alt] + [T] )
  2. Change to the following directory:
    cd /usr/share/backgrounds/ubuntu-mate-common/
  3. Rename the old background picture:
    sudo mv Ubuntu-Mate-Cold.jpg Ubuntu-Mate-Cold.old
  4. Copy your image here:
    sudo cp [path/to/your/image] Ubuntu-Mate-Cold.jpg

Note: Do not change the file extension for the background image, even if it is not a jpg but for example a PNG. The background image should be displayed normally anyway.

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