It seems I've had the same problem with root authentification in Rigo. I'd opened another thread for that:
I have SL X with KDE 4.9.5 now, updated yesterday.
And for my authentification problem I've found a solution, because there was an update according to 'DBUS'.
I said, that it is possible for me to open a konsole and do an su and login as root. That works.
So then when I am root I did, what I read here:
and after that, DBUS was updated.
Then I rebooted my laptop and started Rigo. It still looks weird (graphics problem?) but now I can enter my root password to proceed an action. This works also.
My conclusion: DBUS was the problem here. Though, I don't know, why you can't do an
Are you root in a konsole? For me, then it worked.
Try again. Much success.
-Linuxfluesterer (I love KDE ...)
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