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In previous Ubuntu releases, the user was able to modify the Unity wallpaper in the System Settings programme (Appearance panel). This action no longer has an effect on Ubuntu 18.04.

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How can I change the Unity wallpaper in this Ubuntu release?

Update I: this is the output requested by Joshua Besneatte:

$ pstree -s $(pidof X)|grep gdm
        |-gdm3-+-gdm-session-wor-+-gdm-wayland-ses-+-gnome-session-b-+-gnome-shell-+-Xwayland---14*[{Xwayland}]
        |      |                 |                 `-2*[{gdm-wayland-ses}]
        |      |                 `-2*[{gdm-session-wor}]
        |      |-gdm-session-wor-+-gdm-x-session-+-Xorg---3*[{Xorg}]
        |      |                 |               `-2*[{gdm-x-session}]
        |      |                 `-2*[{gdm-session-wor}]
        |      `-2*[{gdm3}]

Update II: following some discussions on Google+ I tried disabling Wayland. This had no effect, though.

  • 1
    Have you installed and logged into Unity manually (18.04 has GNOME by default)? – pomsky Aug 17 '18 at 8:23
  • Unity was installed automatically. – Luís de Sousa Aug 17 '18 at 8:28
  • it should be gdm... what happens if you run this pstree -s $(pidof X)|grep gdm – Joshua Besneatte Aug 17 '18 at 8:31

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