Linux Mint is fantastic. Until its not. Cinnamon runs into all sorts of issues with its "hardware device driver" snafu, the occasional session bus error (at least when running cinnamon on openSUSE), and apt often renders itself non-functional with the nonsensical error sudo apt --fix-broken install which of course would be awesome if it worked. But it doesn't. It never has. It doesn't even appear to be valid syntax. This variation however, does work:
apt-get -f install
Why the openSUSE online repositories had to go offline today however, is just maddening.
Also, this helped: # zypper in openSUSE-release-usb-X11