Bug#978008: libkwaylandserver5: undefined symbol: _ZN14KWaylandServer17XdgShellInterface14surfaceCreatedEPNS_24XdgShellSurfaceInterfaceE"

[Vincas Dargis <vindrg@gmail.com>]

On Thu, 24 Dec 2020 21:56:55 +0900 Norbert Preining <norbert@preining.info> wrote:
> Which version of kwin do you have installed?
>
> Seems like a missing breaks against old versions of kwin or so.

After removing user-manager, full-upgrade upgraded kwin too:
```
Unpacking kwin-x11 (4:5.20.4-3) over (4:5.19.5-3+b1) ...
```

Now my status is this:
```
$ dpkg -l "*kwin*" | fgrep ii
ii  kwin-common                            4:5.20.4-3   amd64        KDE window manager, common files
ii  kwin-data                              4:5.20.4-3   all          KDE window manager data files
ii  kwin-style-breeze                      4:5.20.4-2   amd64        KWin Breeze Style
ii  kwin-x11                               4:5.20.4-3   amd64        KDE window manager, X11 version
ii  libkwin4-effect-builtins1              4:5.20.4-3   amd64        KDE window manager effect builtins library
ii  libkwineffects12a                      4:5.20.4-3   amd64        KDE window manager effects library
ii  libkwinglutils12                       4:5.20.4-3   amd64        KDE window manager gl utils library
ii  libkwinxrenderutils12                  4:5.20.4-3   amd64        KDE window manager render utils library
ii  qml-module-org-kde-kwindowsystem:amd64 5.77.0-2     amd64        provides integration of QML and KDE frameworks - 
kwindowsystem
```

> > It seems that I have go perform `full-upgrade` that removes `user-manager`. After that KDE desktop works.
>
> Yes, user-manager is going away. It is now a kcm and not a separate
> program.

So I guess I've got stuck on just a transition. I thought user-manager removal was one of these 
temporarily-transitional-stuff, so I avoided that. I should have removed it and there would be no issue.

Sorry for the noise.