I know my administrative and account password. But, whenever I try to change it or do anything like connecting to wifi, connecting to a new internet connection whether it be wired or a mobile network, or anything work, my Ubuntu 12.04 ( Which I have been using since 2012) is showing this message for a few days, I will be highly grateful if someone tells me how to solve this , I deadly need to connect wifi at least. 
Asked
Active
Viewed 202 times
1
programking
- 1,471
Myshkin
- 141
- 1
- 7
sudo passwd root– g_p Sep 20 '14 at 13:30groups? And are you able to run a command as root withsudo--for example, what happens when you runsudo echo success? And can you run a command as root withpkexec? Trypkexec echo successtoo. For the PolicyKit authentication dialog to ask you for root's password is extremely strange on Ubuntu. This deserves to be investigated and properly fixed. – Eliah Kagan Sep 21 '14 at 03:23