TL;DR: Try deleting your ~/Pictures/Wallpapers and making sure your default file browser is Nemo and not Nautilus.
Ok, so far it has been staying the intended wallpaper. Here's some info I could find: - I started with Unity and installed cinnamon via aptitude. - When the wallpaper "switched" I was unable to set it back with the system settings menu in cinnamon. - Rebooting seemed to be the only way to fix it for me. - The switched wallpaper was the one I used for Unity before installing cinnamon. It also showed "phantom icons" where I had icons arranged on my Unity desktop. - Not sure what triggered it, but it seemed to happen when I unlocked the screen or plugged in USB devices. - I deleted all of the wallpapers I used in Unity at ~/Pictures/Wallpapers. That caused it to immediately switch to the Cinnamon wallpaper. - After that it eventually switched to the *default* Unity wallpaper. - I'm not sure what changed but eventually the wallpaper was totally removed and the background was black. After this I could set the wallpaper with the system settings in Cinnamon just fine. - I also noted that during this time, I had changed the default file browser from Nautilus to Nemo. I think something about opening Nautilus triggered the background change. This would explain why plugging in a USB drive seemed to trigger it. As Nemo is the intended file browser for cinnamon, this bug might have been missed in testing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1581263 Title: Problems with wallpapers in Cinnamon 3.0 with Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cinnamon/+bug/1581263/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
