System tray notifications were released a while back for Ubuntu 11.04 Unity (Natty Narwhal). Unfortunately, the system tray option is not available for all applications and merely works with a few apps such as Mumble, Java applications and Wine. In this post I will tell you how to enable system tray notifications for all applications.
Open the Terminal window and enter the following command:
gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"
To whitelist a certain applications, use the command below. In the given command, make sure you replace “YOUR_APPLICATION”, with the name of the application which you wish to add to the whitelist.
gsettings set com.canonical.Unity.Panel systray-whitelist "['JavaEmbeddedFrame', 'Mumble', 'Wine', 'Skype', 'hp-systray', 'YOUR_APPLICATION']"
Log out and login again for the changes to take effect. By following this method, you can add a number of applications to the whitelist to add them to the Systray.
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