Ubuntu MATE 20.04 - How to remove Reminders indicator from panel [duplicate]

I tried out evolution and decided I didn't care for it. During the process this Reminders indicator appeared on the panel.

I've now uninstalled and purged evolution but I still have this, now non-functional indicator on the panel.

How do I get rid of it?

Solution 1:

You have to copy the /etc/xdg/autostart/org.gnome.Evolution-alarm-notify.desktop file to your home folder by

mkdir -p ~/.config/autostart/
cp /etc/xdg/autostart/org.gnome.Evolution-alarm-notify.desktop ~/.config/autostart/
sed -i "s/NoDisplay=true/NoDisplay=false/" ~/.config/autostart/org.gnome.Evolution-alarm-notify.desktop

and then disable its launch from mate-session-properties (Startup Applications).

Also disable its systemd user services:

systemctl --user mask evolution-addressbook-factory.service
systemctl --user mask evolution-calendar-factory.service
systemctl --user mask evolution-source-registry.service
systemctl --user mask evolution-user-prompter.service

and then reboot.