Important
KDE bug tracker link: https://bugs.kde.org/show_bug.cgi?id=488277
Fake KWin DBus service so that KDE 6 shutdown/reboot/logout works when not using KWin. It exposes the closeWaylandWindows method through the org.kde.KWin service and /Session object.
- KDE 6 commit responsible for the change: https://github.com/KDE/plasma-workspace/commit/23cca93b879d0fcf9f430b03a482dbca1e0a1d79
- KWin DBus config: https://github.com/KDE/kwin/blob/master/src/org.kde.KWin.Session.xml
- KWin implementation for the DBus methods: https://github.com/KDE/kwin/blob/master/src/sm.cpp
You may need Qt6 development packages to build this (qt6-base-dev for Ubuntu, qt6-qtbase-devel for Fedora, qt6-base for Arch Linux).
git clone https://github.com/DMaroo/fakwin.git
cd fakwin
mkdir build
cd build
cmake ..
make
The fakwin binary gets generated in the build directory. Once you run it, it will establish the relevant services and the methods. To check if everything's in order, run the following command.
$ qdbus org.kde.KWin /Session
method bool org.kde.KWin.Session.closeWaylandWindows()
signal void org.freedesktop.DBus.Properties.PropertiesChanged(QString interface_name, QVariantMap changed_properties, QStringList invalidated_properties)
method QDBusVariant org.freedesktop.DBus.Properties.Get(QString interface_name, QString property_name)
method QVariantMap org.freedesktop.DBus.Properties.GetAll(QString interface_name)
method void org.freedesktop.DBus.Properties.Set(QString interface_name, QString property_name, QDBusVariant value)
method QString org.freedesktop.DBus.Introspectable.Introspect()
method QString org.freedesktop.DBus.Peer.GetMachineId()
method void org.freedesktop.DBus.Peer.Ping()
It is important that the bool org.kde.KWin.Session.closeWaylandWindows() shows up in the output.
You can add a user systemd service for this so that you don't need to run this manually everytime you want to shutdown. Here's an article teaching how to do it.
heckelson/i3-and-kde-plasma#54 motivated me to build this.