Dr. Nikolaus Klepp composed on 2017-10-10 08:36 (UTC+0200):
export TDEROOTHOME=/root/.trinity
Now "kcontrol" comes up with all modules, clicking on *.pdf in "kmail" brings up kpdf, "konqueror" works as expected :-)
Are you sure about that? That directory shouldn't even exist, unless you have run a TDE session logged in as root. I have to think it should be /opt/tde if that's where the package manager installed TDE, or in /etc/trinity.