Hi Marc, I am hoping you can expand a little on that
Plasma shows up as an option at boot up, I select Plasma, yet it still just loads Cinnamon.
Does this mean that since your OP (original post) at #1, and #6, you are currently
- (still) using a Cinnamon DE as a baseline, that you
- have managed to get KDE packages installed, either via the command line or Synaptic Package Manager and now
- have a bordered pane at login that allows to to choose a DE icon of Cinnamon, Cinnamon Rendered and Plasma - from the top right corner
... or otherwise?
The following two screenshots are taken from my own environment, which includes a set of quadruplets based originally on Linux Mint 18 'Sarah' KDE, which I then upgraded to 18.1 'Serena' via the GUI Updater. I then added Cinnamon, MATE and Xfce to it. So the File Manager is Dolphin while I am in KDE Plasma session.
that I am in /home/<yourusername>/.config - not sure of anyone's skill levels as I am new here. But the dot before config means the folder or file is hidden by default, so in my /home/chris/ I will have clicked Ctrl-h for the session to see them, or for longer term tweaked the Preferences in my FM (File Manager) to show hidden files and directories.
that I have highlighted the folders -
- caja, showing MATE DE is present
- nemo for Cinnamon and
- Thunar and xfce4 for Xfce
So that was in your Home folder's subfolders, and it seems that you should have nemo
showing if you have been successful in installing KDE on a Cinnamon baseline.
The next screenshot is a logical follow on from what JasKinasis was saying above at #2
As long as you have the kde.desktop file in the /usr/share/xsessions/ ...
So we are in usr/share/xsessions (where my Dolphin FM says Root at the left, Cinnamon's would say File System, or Ubuntu ... Computer), and the names are pretty self-explanatory. For the Viewers whom may not know, Plasma and KDE and now intimately and inextricably intermeshed.
So Marc, if you can either present your own screenshots of your circumstances, or else confirm or deny and outline differences, we may get a better picture of where you stand.
If you need help posting screenshots, sing out, unless Rob and his Team have a guide elsewhere (I don't want to go off-Topic or reinvent the wheel).
Cheers all and