So I have been having an issue with the login wallpaper (not the lock screen). If I select a wallpaper that is default with linux mint, it displays fine. If I select an image that I downloaded, it just stays as a black screen (can of course navigate and login, just can't see the wallpaper).
My home directory is encrypted, so I copy my backgrounds directly to the folder where the default wallpapers are kept. I do so with the following command:
sudo cp Pictures/Backgrounds/filename /usr/share/backgrounds/linuxmint/
This copies the file to the folder, and I can select the image, but when I logout, the new chosen image doesn't work. I've tried looking at other solutions covering this, tried copying to the /opt/ folder, but still nothing displays. Tried turning off and on "Draw user backgrounds", still not working.
I'm really at a loss of what else to do here.