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I recently upgrade my machine from Linux Mint 17.3 to Mint 18.1 (by completely formatting and installing from clean). I got pretty much back to a good state - with one exception.
When I had 17.3, if I execute (as a normal user) an application that requires elevated privileges (e.g. gparted, mint-update, etc.), I would normally get a prompt for privilege escalation. Once I entered my password, the app would then run.
With the 18.1, I now don't get these prompts. In fact, nothing happens at all. Mint-update simply sits there for a few seconds, then shows an error message saying that update failed. Gparted doesn't start at all.
If I start any of these applications from a terminal with sudo, then everything works correctly.
How can I get the old behaviour of prompting for privilege escalation back?
Aleks G
Posted 2017-02-24T14:33:23.797
Reputation: 352
Did you perhaps forget to make your user a sudo user? It sounds in your previous configuration your user was a sudo user set to prompt for the password (instead of configured for sudo without a password). – Ramhound – 2017-02-24T15:52:05.240
The user is configured correctly, as using sudo from command line works as expected, prompting for password. Yet UI apps don't prompt and don't do the actions. – Aleks G – 2017-02-24T15:56:42.680
Provide us the contents of your sudoer file please – Ramhound – 2017-02-24T17:54:48.977