So, I updated Tumbleweed, and the updates to KDE caused my Plasma/Wayland session to restart, breaking the updates part way through. I wasn’t watching at the time so took some while to debug!
Spent some time learning how to use nm-cli, because new half-upgraded KDE wouldn’t load the network widget. It looks like something else may have changed and mucked up in the half-update (and of course I rebooted like a wise-man/dummy/i-dont-know-but-at-least-it-didnt-make-it-work) but iterations of trying things in nmcli eventually worked!
Finally tried zypper dup again and saw the session restart, so finished the job from the virtual terminal! At last, I seem to have a working computer again, and I might just brave updating my main laptop. (I cancelled the update while it was still downloading packages, after seeing the breakage on the other laptop!)
I installed lxqt and did supper DUP from xterm on there. Worked for me.
I wanted to try a different DE to get things working, but with network manager down I couldn’t install anything else! Tumbleweed already had IceWM, but without any networkmanager control there either.
Course that was before I discovered I didn’t need any internet to finish the job and fix it. I assumed the update completed but broke something, and hoped against hope there’d be a fix issued quickly that I could further update to.
P.S. I assume you mean
zypper dup, but perhaps you’re using the new Irish Culinary/Political Linux, andsupper DUPis the right command.