I came back to Ubuntu 18.04 after a season using Lubuntu, But I have not yet been able to extend one wallpaper to all three monitors I use. How to do it?

All I get is this:

enter image description here

How to extend/tile/zoom/scale/"etc" wallpaper as I got before?

enter image description here


Settings for the positioning of the wallpaper are not exposed to the user in Gnome Shell (sigh...). The setting is however available in Gnome Tweak. Gnome Tweak is not installed by default in Ubuntu 18.04 (and 17.10), so you may need to install it first. On the "Appearance" tab, you will find a "Adjustment" dropdown under "background". To extend your wallpaper across screens, select the option "Stretched".

For more advanced users: the setting may also be enabled with dconf-editor, which also is not installed by default. A third way is to change the setting through the terminal, e.g.:

gsettings set org.gnome.desktop.background picture-options 'stretched'

You can reset to the factory default:

gsettings reset org.gnome.desktop.background picture-options
  • Thanks! It worked. Following your idea, I changed using dconf-editor. You can improve your answer adding that info, as I did here – Redbob Jul 17 '18 at 12:20

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