Read this if your package includes a status notifier / system tray icon

[Matthias Clasen]

On Wed, 2014-03-05 at 20:04 +0100, Kevin Kofler wrote:

> ----------------------+-----------------------------------------------------
> GTK+ (2 or 3)         | You must use Canonical's libappindicator, which is
>                       | interoperable with the KDE implementation. It is
>                       | already packaged in Fedora. Several GTK+ packages
>                       | already support it, for those, it is only a matter
>                       | of adding the BuildRequires (libappindicator-devel
>                       | for GTK+ 2, libappindicator-gtk3-devel for GTK+ 3).
>                       | For some others, patches to add libappindicator
>                       | support are available from Ubuntu.
> ----------------------+-----------------------------------------------------

Of course, you can also just stop using status icons and instead inform
the user with notifications when something requires his immediate
attention. That will work under any desktop.