If I understand you right, then the system was originally setup as a Mate system, i.e. Linux Mint running the Mate desktop.
Now you have added the KDE.
Well, in this case, I assume that the automatic startup item which determines which programme will display and handle the desktop still points to "caja". And "caja" refuses to display the desktop on KDE.
So you should go to /etc/xdg/autostart and look for *.desktop files which hold the name of the Mate file manager and of the KDE file manager and edit them to make sure only the KDE file manager feels responsible for displaying the desktop.
I assume the file for Dolphin (?) or Konqueror (?) should look almost like the one for Nemo, nemo-autostart.desktop:
- Code: Select all
Comment=Start Nemo desktop at log in => Start Dolphin at log in
Exec=nemo -n ==> dolphin [options]
OnlyShowIn=GNOME;Unity; ==> OnlyShowin=KDE I guess