I had the exact same problem until I change my password. My old password contained the string "%m" (percent sign, m), I'm pretty sure polkit-grant-helper badly mangled this string before validating th password.
Hint : - type your password, but don't hit "Enter", - switch to a text console and run "sudo strace -p $(pidof - go back to to your Gnome console an hit "Enter" - go back to the text console and see the string polkit-grant-helper tried to write... -- PolicyKit authentication not accepting passwords https://bugs.launchpad.net/bugs/208055 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
