Is it possible to stop Nepomuk Controller from starting up in KDE SC 4.8 without disabling Nepomuk itself? It's the only tray icon that I just can't find a way how to remove.

Right click on it -> Quit (to make sure it's not saved in your session).

Then, in System Settings -> Startup and Shutdown -> Autostart, disable "Nepomuk File Indexing Controller".

Thank you. It was quite hard to discover as I had to add the "Nepomuk File Indexing Controller" entry myself. Hopefully this will be moved to system tray settings in the future.

Hm, if the entry wasn't there it shouldn't have started automatically to begin with. Did you try to simply quit it before?

The reason it's not in the system tray settings is that it's an application, not a Plasma widget.

Ok, it seems that the icon appears everytime Nepomuk starts indexing, checking files or something like that and stays in the tray even after it has finished up. So the startup setting didn't have anything to do with it. I guess the case is open again.

I can't reproduce that, when I quit the application, it's gone even if Nepomuk is indexing.

The normal behavior is for the icon to stay hidden when it's not indexing, are you sure that's not what you're referring to? (It can then be found by clicking on the ^ arrow.)

I have all system tray icons on "show always" setting. I want to disable Nepomuk Controller competely as I don't need it however I do want to keep Nepomuk running on the background. Now I of course first tried to quit the app and it seems to work for one session but it starts again after relogin.
There's "nepomukcontrollerrc" file on kde configs that has these lines:

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[Notification Messages]
systemtrayquitNepomuk Controller=true
systemtrayquitNepomukin hallinta=true

I tried both true and false but it has no effect. It simply keeps starting up.

EDIT1: It seems that the "quit confirmation dialog" changes the last line to false.
EDIT2: The first line is simply for different locale and doesn't reappear after removing the file.
-> So this settings file seems to have absolutely no effect on anything.

Hi,
this thread is a bit old now, but I was facing the same problem a few months ago and now again after a distribution upgrade.

I Just renamed the .desktop-file of the nepomukcontroller, which disabled the autostart system-wide (controller only, not the nepomuk-service itsself!)

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sudo mv /usr/share/autostart/nepomukcontroller.desktop /usr/share/autostart/nepomukcontroller.desktop.off

This worked on my Kubuntu 12.04 and 11.xx, using KDE 4.8 respectively 4.7

Best regards,
Ludwig

EDIT: I'm not very familiar with .desktop-files but maybe one could create a user-specific nepomukcontroller.desktop, to not disable autostart system-wide and without the need of root-privileges.

Yes, one can do this fairly easily.

Create a file in ~/.config/autostart/ (creating the folder if needed) named "nepomukcontroller.desktop". Give it the following contents:

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[Desktop Entry]
Hidden=true

Awesome, it works. Thanks.