I have unknown notification in my Notifications. I have all the necessary notifications like, Network, Power, terminal, Music, Geary, thunderbird etc.,

How can I remove it from Notifications menu.



I was able to remove it by using dconf

sudo apt-get install dconf-editor #to install dconf-editor

Open dconf-editor --> org --> pantheon --> gala --> notifications.

Here you will see: apps the corresponding value should have entries like: 'appname:show,on'. But you will see an entry without appname like just ':show,on'.

(The actual syntax is :['{APP-NAME}:{PRIORITY (show/hide)},{SOUNDS on/off}', ...])

Remove it, it will remove the unknow notification icon.


After removing ':show,on':


You can make the notifications to default by clicking Set to Default in dconf (See screenshot above).

Using terminal:

Open terminal and run:

gsettings get org.pantheon.desktop.gala.notifications apps

It gives the similar output:

['NetworkManager:show,on', 'Power:show,on', 'terminal:show,on', 'guake!:show,on', 'org.pantheon.noise:show,on', 'vlc:show,on', 'vlc media player:show,on', 'xneur:show,on', ':show,on', 'thunderbird:show,on', 'geary:show,on']

You will see ':show,on' in the output.

Now run:

gsettings set org.pantheon.desktop.gala.notifications apps "[]"

Inside the [], copy paste the above output except ':show,on'

For example:

gsettings set org.pantheon.desktop.gala.notifications apps "['NetworkManager:show,on', 'Power:show,on', 'terminal:show,on', 'guake\!:show,on', 'org.pantheon.noise:show,on', 'vlc:show,on', 'vlc media player:show,on', 'xneur:show,on', 'thunderbird:show,on', 'geary:show,on']"

Note: I have used \ before ! as escape sequence in the example.

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