And I have a work around! Thanks to the information in this post: https://archived.forum.manjaro.org/t/how-to-reset-kde-panel-widgets-etc- after-becoming-invisible-following-display-config-change/155280
It suggests: % rm ~/.config/plasma-org.kde.plasma.desktop-appletsrc ~/.config/plasmashellrc i'm a little more cautious so I moved them out of the way: % mkdir ~/.config,cya % mv ~/.config/plasma-org.kde.plasma.desktop-appletsrc ~/.config/plasmashellrc ~/.config,cya/. then I killed plasmashell and restarted it and the panel was back! Opening the bug here so other folks with the same problem will know the work around. I suspect it will be hard to actually fix this. ** Attachment added: "Config file 1 of 2 that I moved out of the way to fix this." https://bugs.launchpad.net/ubuntu/+source/plasma-workspace/+bug/1962518/+attachment/5564252/+files/plasma-org.kde.plasma.desktop-appletsrc -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to plasma-workspace in Ubuntu. https://bugs.launchpad.net/bugs/1962518 Title: KDE panel disappeared after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-workspace/+bug/1962518/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs