I have a system tray icon (Steam) that doesn't display its name when you hover the mouse over it (nor the application icon). Steam uses appindicator. http://i.imgur.com/gOu6nAO.png If I recall correctly, this was working in in KDE4. The indicator clearly has a name, if you go to the entries tab in the system tray settings you can see it has the proper name. http://i.imgur.com/prtbRDU.png I'm not really sure if this is a bug with Plasma 5 or with Steam itself, so please let me know if this isn't a problem with Plasma so I can file this over at Steam's issue tracker.
Confirming. dbus response from Steam. /org/ayatana/NotificationItem/steam @a{sv} {"AttentionAccessibleDesc": <@s "">, "AttentionIconName": <@s "">, "Category": <@s "ApplicationStatus">, "IconAccessibleDesc": <@s "">, "IconName": <@s "steam_tray_mono">, "IconThemePath": <@s "/home/david/.local/share/Steam/public">, "Id": <@s "steam">, "Menu": <@o "/org/ayatana/NotificationItem/steam/Menu">, "Status": <@s "Active">, "Title": <@s "Steam">, "XAyatanaLabel": <@s "">, "XAyatanaLabelGuide": <@s "">, "XAyatanaOrderingIndex": <@u 0>}
Git commit 909f1f1ad82248aea6581f8b6576675877ea18b5 by Kai Uwe Broulik. Committed on 28/09/2014 at 17:41. Pushed by broulik into branch 'Plasma/5.1'. Show application title if Status Notifier Item does not provide a tooltip A custom tooltip text is not mandated by the SNI spec. Instead, we just show the application name and icon if none is given. This fixes Steam not having a tooltip and restores Plasma 4.x behavior. REVIEW: 120407 FIXED-IN: 5.1 M +31 -11 applets/systemtray/plugin/protocols/dbussystemtray/dbussystemtraytask.cpp http://commits.kde.org/plasma-workspace/909f1f1ad82248aea6581f8b6576675877ea18b5