Re: [Trisquel-users] Synaptic Package manager doesn't open

[duncan]

Are you using Trisquel Mini? If you aren't getting the password prompt  
graphically (but you clearly can authenticate based on your use of the  
command line) install a package called policykit-1-gnome. For some odd reason  
it is not installed by default on Trisquel mini. If you are not using  
Trisquel mini, check if it is installed anyway. Installing it solved a  
similar problem for me, so I hope this helps.