Cinnamon and Gnome : org.cinnamon.SettingsDaemon

Problem :

After an update of my debian, I lost :

• power management icon
• multiple screen configuration and here
• background images and here
• media keys

And when I tried to apply new screen configuration I had :

GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service

Many references on the net, many solutions :

1. reinstall cinnamon
2. remove configuration file
3. start /usr/bin/cinnamon-settings-daemon
4. ...

All tried, none work.

Solution :

Due to previous ressources and tests, I notice that when starting :

/usr/bin/cinnamon-settings-daemon

I had an error :

You can only run one xsettings manager at a time; exiting

After checking that is wasn't already started with :

ps -aef | grep cinnamon-settings-daemon

I perform a grep with :

ps -aef | grep settings

And I found that I had a gnome-settings-daemon running. Eurêka ! Gnome was my previous X manager.

So after a few checks :

sudo apt-get purge gnome-control-center gnome-settings-daemon gnome-control-center-data gnome-desktop3-data gnome-accessibility-themes

Restart, and all works.