The background settings (right click on wallpaper) seem to be locked. I can't change nothing, not even my wallpaper.
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Does your account have necessary permissions to make changes? You may want to check it by typing in terminal
group and it will show what groups you belong to.
Next thing, you can actually change the user background the hard way. There is a profile folder for each user stored in /var/lib/AccountsService/users. For instance, /var/lib/AccountsService/users/sergiy is my account profile. What you can do is to edit that file with the text editor of your choice. I prefer nano. So what I type is this:
sudo nano /var/lib/AccountsService/users/sergiy
It will prompt for your password (considering that you're in sudoer group, of course) and open the file. Locate line starting with
[User] and line saying
Background . Paste the path to your desired wallpaper after = sign. For instance, here's mine:
After you're done editing , reboot.
And one more thing, I've discovered that file org.freedestop.Accounts.service prevents changes to greeter backgrounds, and most likely to user backgrounds. So try editing this file with a text editor to comment out Exec line. Again, for me this is
sudo nano /usr/share/dbus-1/system-services/org.freedesktop.Accounts.service
Try this first, and let me know if this helps. I've discovered that after commenting out that line, I was able to change lightdm-gtk greeter background, while previously I could not - it would just override whatever settings I placed into lightdm-gtk-greeter.conf, and show my desktop background instead of the image i wanted.
Note: keep in mind that the first solution I posted, will only work if that Exec line is active, not commented out. Second solution, disables Accounts service
Let me know if this helps. Cheers
I had this problem after I installed cinnamon, had to remove it. Wish I could comment.
Simply try using gnome-tweak-tool: in "Desktop" tab, toggle "Icons on Desktop" On. Now you can change wallpaper through "Background Location" option, or even using Ubuntu System Settings -> Appreance (that previously was only changing login screen wallpaper). At the end, you can toggle it off, again, if you like.