This problem started today. I cannot run any programs with elevated privileges from the Unity GUI. I am in the sudo group, and all of this worked fine yesterday...Ubuntu 14.04

  • Software Center immediately closes without offering the password dialog.
  • User Manager does not allow me to unlock.
  • I can no longer mount a USB stick, as I don't have permission.

I CAN execute gksu synaptic from the command line. And I can mount the USB manually with sudo mount /dev/sdl1 /media/usb


I discovered this has to do with PolicyKit. I sort of solved the problem by creating /etc/polkit-1/localauthority.conf.d/60-myauthority.conf and specifically adding my username to AdminIdentities

That still doesn't explain why PolicyKit is not honoring the sudo group in /etc/polkit-1/localauthority.conf.d/51-ubuntu-admin.conf, as I've stated I'm in the sudo group.


I just had exactly the same behaviour - adding the users to the authority list gives them access, but not the group.

In my case I had to reinstall the package libpolkit-gobject-1-0, which I somehow accidentially removed.

Seems that policykit needs that library to find out in which groups a user is.

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