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Earlier today, I installed Pantheon Shell, and got an unpleasant surprise. My wallpaper doesn't work! It doesn't work in either Pantheon, GNOME 3 Fallback, and Unity 2D. Instead, the background is gray, and I can't get rid of it. What do I do?

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A possible fix is:

  1. Install dconf-tools

    sudo apt-get install dconf-tools
  2. Open dconf-editor
  3. Navigate to: desktop -> wallpaper -> picture path.
  4. Type/paste the path to your wallpaper and press enter.

This should fix the problem.

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Since I am new to Ubuntu, I have no idea how the dconf editor works (which I downloaded) and what a wallpaper path is. Please try to make it easier to understand. – Schism430 Oct 15 '11 at 15:01
if you drag a file into a terminal window it will tell you the path to the file inside two ' – Alvar Oct 15 '11 at 15:12
Ok, I figured it out, but inside "Desktop", "Wallpaper" does not exist. I suppose in needs to be reinstalled somehow. – Schism430 Oct 15 '11 at 15:28
The pantheon-wallpaper app is probably running in Gnome3-Fallback and Unity2D. If so: type killall pantheon-wallpaper in a terminal. this does not work in Pantheon itself... – Jonathan Oct 15 '11 at 15:47
@Jonathan: Here is my response once I did that - "pantheon-wallpaper: no process found" – Schism430 Oct 15 '11 at 19:31

I had the same problem recently. I uninstalled all pantheon apps and the problem persisted, then I disabled and re-enabled draw-background in org/gnome/desktop/background with dconf-editor and voila, my wallpaper showed up. Hope this helps!

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