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* Fixing dual Plasma/Xfce installations
Plasma and Xfce both define the ~org.freedesktop.Notifications~ D-BUS
service. That leads to all kinds of fun ([[https://bugs.kde.org/show_bug.cgi?id=381693][KDE bug]]; [[https://bugzilla.redhat.com/show_bug.cgi?id=484945][Red Hat bug]]); on my
machine, it causes Plasma sessions to use xfce4-notifyd instead of
Plasma's own notification mechanism.
[[https://kevinlocke.name/bits/2020/04/12/resolving-desktop-notifications-dbus-service-conflicts/][Kevin Locke]] explains how to solve the issue by defining a third
~org.freedesktop.Notifications~ service in a higher-priority user
directory, which runs a command that will determine the current
desktop environment and start the appropriate notification daemon. In
~~/.local/share/dbus-1/services/org.freedesktop.Notifications.service~:
#+begin_src conf-desktop
[D-BUS Service]
Name=org.freedesktop.Notifications
Exec=/bin/sh -c "~/.local/lib/meta-notify"
#+end_src
This gentleman suggests relying on the ~XDG_SESSION_DESKTOP~ variable
to find out which DE is running; unfortunately, for some reason if I
log into Plasma first, then into Xfce, this variable (as well as
~XDG_CURRENT_DESKTOP~ and ~DESKTOP_SESSION~) keeps saying "KDE" when
the script runs.
(I think this might be caused by Xfce's [[https://gitlab.xfce.org/atomsymbol/xfce4-session/-/blob/xfce4-session-4.14.2/scripts/xinitrc.in.in#L19][xinitrc]] not setting these
variables if they are not empty, but they *are* set when I look at
them in a shell once logged in, so… 🤷)
Thus my version of ~~/.local/lib/meta-notify~ falls back on the window
managers:
#+begin_src sh
#!/bin/sh
wm=$(wmctrl -m | grep '^Name:' | cut -f2- -d' ')
case ${wm} in
KWin)
exec /usr/bin/plasma_waitforname org.freedesktop.Notifications
;;
Xfwm4)
exec dbus-send --session \
--dest=org.freedesktop.systemd1 \
/org/freedesktop/DBus \
org.freedesktop.systemd1.Activator.ActivationRequest \
string:xfce4-notifyd.service
;;
*)
/usr/bin/logger -t $(basename "$0") Unknown window manager \"${wm}\"
exit 1
esac
#+end_src
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