I use Ubuntu 11.10. After successful obtain of all available updates I have a problem with authorization of any action that requires my password. I cannot use Ubuntu Software Center, Terminal... My password input is correct because I use it to log in to the system. Can anyone tell me what went wrong?
I had similar problem and I found that I changed hostname in /etc/hostname but not in the rest of places. So check your hostname. If it is not problem with hostname try to remove any asking for password: Complete tutorial for removing password for programs and actions is here: http://linuxibos.blogspot.com/2012/06/run-programs-and-actions-without.html