Unfortunately quite a lot of paths have changed in the transition from KDE 4 to 5, and dolphin moved to KDE5 while konqueror seems to be still on KDE4:
$ konqueror --version Qt: 4.8.7 KDE Development Platform: 4.14.12 Konqueror: 4.14.10 $ dolphin --version dolphin 15.08.1 I found that in addition to dolphinpart.so, you also need to copy/link various service files: /usr/share/kde4/services/dolphinpart.desktop -> /usr/share/kservices5/dolphinpart.desktop /usr/share/kde4/services/kcmdolphingeneral.desktop -> /usr/share/kservices5/kcmdolphingeneral.desktop /usr/share/kde4/services/kcmdolphinnavigation.desktop -> /usr/share/kservices5/kcmdolphinnavigation.desktop /usr/share/kde4/services/kcmdolphinservices.desktop -> /usr/share/kservices5/kcmdolphinservices.desktop /usr/share/kde4/services/kcmdolphinviewmodes.desktop -> /usr/share/kservices5/kcmdolphinviewmodes.desktop While the following binary files need to be taken from a previous version of dolphin: /usr/lib/kde4/dolphinpart.so /usr/lib/kde4/kcm_dolphingeneral.so /usr/lib/kde4/kcm_dolphinnavigation.so /usr/lib/kde4/kcm_dolphinservices.so /usr/lib/kde4/kcm_dolphinviewmodes.so /usr/lib/libdolphinprivate.so.4 This worked for me, although I can't guarantee it's either a minimal or a complete setup. Ofc, better to downgrade the dolphin package as you suggest and wait for it to be fixed properly.