Ubuntu – Some system tray icons invisible in Gnome Classic 12.04

12.04gnome-classicindicatornotificationsystem-tray

Tried all possible ways to give visibility to tray icons in Ubuntu 12.04 but no luck 🙁

Dconf-editor -> Navigate to Desktop -> Unity -> Panel -> change the value of systray-whitelist to "all"
gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"
Set values of above to include pidgin, davmail, etc.

Please note that only some tray icons are invisible. I still cant see pidgin, davmail, guake tray icons. I am on Ubuntu 12.04 Gnome classic mode (gnome-session-fallback).

Best Answer

The solution is to add the Notification Area applet. Taken from this question No Banshee notification area icon in Gnome 3 classic session

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A crude generic solution:

How to disable notification from network-manager.

dbus-monitor "interface='org.freedesktop.Notifications'"                \
| grep --line-buffered  'string "NetworkManager"'                       \
| sed -u -e  's/.*/killall notify-osd/g'                                \
| bash

Replace string "NetworkManager" with the desired RE to filter out messages.

To get an idea of what RE pattern match to look for run:
dbus-monitor "interface='org.freedesktop.Notifications'"
and look at the output while the notifications are popping-up.

Caveat:
killall notify-osd is non-discriminating and completely wipes the notification stack of any pending messages irregardless of whether NM is the notifying agent.

For details see:
How can I temporarily filter-out certain notification-bubbles coming from specific sources?

cross refs.:

Ubuntu – Missing system tray icons Ubuntu Gnome 18.04

You may also simply try to relaunch gnome shell and see if it works better:

(Alt+F2) gnome-shell --replace

Or the short and easy way

(Alt+F2) r (Enter)

Yes, just the letter "r".

Best Answer

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Ubuntu – Filter messages to “notification area” applet

Ubuntu – Missing system tray icons Ubuntu Gnome 18.04

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