I have managed to put my user session (GNOME 3) into a state where the running applications list contains an entry which I don't believe exists. By this, I mean that the Applications bar has the active indicator (blue underline in my session) for a particular application, and when I select that item, GNOME switches to a particular Workspace, the same Workspace every time, and though I see no window for that application, after a short while, GNOME prompts me with the
"[Application]" is not responding window. But, even if I select
Force Quit, the application entry never loses its active indication.
I can't find any match that I would recognize in
ps -u USER or
killall [TAB completion], which leads me to believe that the process no longer is running, but that GNOME still believes that it is. Though I am sure that I could log out and the running status would clear itself, which tools can I use to query my GNOME session to identify the application information and even gracefully clean up the issue without logging out?