I've tried the suggestions in Network manager indicator missing (and rebooted), but I still don't have a Network Manager indicator.
How can I diagnose the problem?
For what it's worth, I'm using "Gnome classic (no effects)" (therefore I did not use "the Dash", whatever on Earth that is, to add the
nm-applet to my startup apps; I just used the
Startup Applications... dialog from the session menu).
Also, I cannot find the entry
org > gnome in