"Adding Printer" dialog asks for root password?

I try to set up my printer under Ubuntu. So far it worked that I succeed to install the drivers. But Ubuntu says: No driver available for this model. This is the problem that Ubuntu doesn't recognize the right model, so I have to add and the choose the right driver manually. No problem I thought. But when I try to add a printer, I'm prompted to provide a root password although I didn't set up one? So i'm not able to confirm the dialog and add my printer, what's the reason?

Solution 1:

If you don't want to hassle with the root passwords you can just do: gksudo system-config-printer

Solution 2:

Try to set a root password, if you realy want to log as root. In terminal type: "sudo passwd root" (without quotes).