Comment 15 for bug 1576500

Doesn't quite fix it for me.

Purging and reinstalling snapd had no effect.

~/.local/share/plasma already had one thing in it, so I created a variety of new links into /usr/share/plasma/*. That gave me a KDE splash screen, the popup about plasmashell being missing went away, and the crash report dialog was for baloo-file instead of krunner. Still no taskbar, widgets, wallpaper, etc.

Creating a link for /var/lib/snapd/desktop/plasma or making the link and purging and reinstalling snapd again (the link survived the purge) had no effect. So I still get to go through the same workaround thunderbird>chromium>konsole>teamviewer>plasmashell.

After doing all this, the second instance of KDE lost its taskbar. Had to create it again from the right-click menu on the desktop. The new one looks different, so perhaps it was previously loading the 15.10 version somehow.

Also, when the second instance of X starts, the first thing that appears is the login screen, which looks like the Kubuntu 15.10 version. When I lock the screen, I get the 16.04 screen locker. The former displays the time in a localized format based on the physical location of the computer (China), the latter displays the time using the system language/localization (Canadian English).

So I'm wondering if something moved around between the two versions, but without updating an important config file somewhere.