Ubuntu 12.04 Unity greeter had introduced the selected user dynamic wallpaper which allowed, when selecting a user from the available users list in the login screen, the wallpaper to change to reflect the selected user's desktop wallpaper.

Apparently that feature has been disabled by default since Ubuntu 12.10.

How do I enable that feature in Ubuntu 13.04?

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    Maybe investigating the file /etc/lightdm/unity-greeter.conf (from @Hernantz's answer to the same question)? – carnendil Apr 25 '13 at 21:41
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    I am pretty sure it should be enabled by default, and not disabled... some sort of bug perhaps? – TheXed Apr 25 '13 at 21:46
  • @Gui it was enabled by default on 12.04, it was disabled since 12.10. I have experienced that both on my desktop and laptop. – Marco Lackovic Apr 25 '13 at 21:51
  • @Krige I don't know, but I can tell you that I am running 12.10 and it works fine for me... – TheXed Apr 25 '13 at 21:54
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    @carnendil my unity-greeter.cong contains only three lines. I don't think it is used anymore as I read it was replaced with gsettings. – Marco Lackovic Apr 25 '13 at 22:01

Open a terminal and run the following commands:

sudo -i
xhost +SI:localuser:lightdm
su lightdm -s /bin/bash
gsettings set com.canonical.unity-greeter draw-user-backgrounds 'true'

Note: the selected user dynamic wallpaper works only if you have a fixed wallpaper. It won't work if you have selected the option to change throughout the day.

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