And please take the most important thats the global policy, thats to use sudo group, that can be checked in 'kcmshell kcm_polkitconfig'
Ff the default is set to group sudo and if you belong to sudo group, and sudo is set to NOPASSWD, then should not prompt any password, this is clear enough, just hope you can understand it.
also take a look at /etc/polkit-1/localauthority.conf.d/{51-ubuntu-admin.conf,75-polkitkde.conf} where you can see default:
And please take the most important thats the global policy, thats to use sudo group, that can be checked in 'kcmshell kcm_polkitconfig'
Ff the default is set to group sudo and if you belong to sudo group, and sudo is set to NOPASSWD, then should not prompt any password, this is clear enough, just hope you can understand it.
also take a look at /etc/polkit- 1/localauthorit y.conf. d/{51-ubuntu- admin.conf, 75-polkitkde. conf} where you can see default:
AdminIdentities =unix-group: sudo