I think I am having the same problem as in this thread but none of those solutions work. I have unchecked the PolicyKit Authentication Agent in the Desktop > Startup > Session preferences. I have also added LXDE to the NotShownIn line of /etc/xdg/autostart/lxpolkit.desktop. I also installed policykit-1-gnome to get the option to disable PolicyKit authentication. But I am still seeing the error message on VNC log in.

I am running Jessie on an RPi 3.


I could display the "LXPolKit" option in the menu "Desktop Session Settings" by editing the file

sudo leafpad /etc/xdg/autostart/lxpolkit.desktop

and change the last line by


After I restarted the raspberry, I could see and uncheck the "LXPolKit" option. I get rid of the message finally, but I did other things before. So I'm not sure it's the only things to do.

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