I have a problem with Ubuntu 13.04, there is no wallpaper except a white one . I tried to change it but it didn't change.
Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.
Ubuntu 13.04 is currently still in development so this will likely be resolved once it releases. And it is policy not to answer to bugs in dev versions.
But to at least give you a hint, could you check if the 'backgrounds' folder is present and has pictures in it? To do this type