Martin Steigerwald - 16.08.17, 23:43: > There is no automatic way to undo the action. I suggest you install again > by using metapackages like > > - plasma-desktop > - kde-standard > - kde-full > > depending on the amount of packages you want to have installed. > > And then add any additional packages you want to have again.
I missed that this wouldn´t fix current KDE/Plasma packages not fitting yet to Qt 5.9.1. So I suggest you switch to Debian testing temporarily. Then either aptitude install one of above meta packages will over a nice solution that will downgrade Qt packages to 5.7.1 again… or you need to manually do that by something along the lines of apt/aptitude install package=versionnummer Next time check output of apt more closely. It must have shown a *very long* list of packages it is about to remove. Another thing would be to temporarily install a different desktop like lxqt or Mate or so :) Thanks, -- Martin