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When one sees this "banned" icon in the system tray:

system tray screenshot

How does one determine which program's icon failed to load? Hovering over it fails to do so. Clicking on it drops down a blank area.

marked as duplicate by Zanna, edwinksl, Anwar, Luís de Sousa, Pilot6 Aug 11 '16 at 9:18

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  • it misses its icon, that's all :) – patrick Aug 9 '16 at 6:47
  • How do you remove it? What exactly you mean by screw up? – user308164 Aug 9 '16 at 6:58
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    it's a process that can't find its indicator icon (or (I believe) got messed up by a race condition). In Xfce that could be Dropbox I know (in which case you could fix it by doing dropbox stop && dbus-launch dropbox start – Zanna Aug 9 '16 at 9:14
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    This icon typically appears if there's a package management issue. Could you please open a terminal, type and run the command sudo apt-get install -f and edit your question to include its output? Please post text files and program output listings as text, not as images (see How do I save terminal output to a file?). Thanks. – David Foerster Aug 9 '16 at 9:27
  • I don't know why the drop-down menu appears empty though. – David Foerster Aug 9 '16 at 9:29