[Trisquel-users] Antwort: Updater Won't Update?

[rhutter]

Just have a look at the existing issues. There's a not so old one called  
"Synaptic will not start graphically".
But the problem there is more general, and the fix is here:
http://trisquel.info/de/issues/15394
You need a polkit, either lxpolkit or policykit-1-gnome.