Comment 11 for bug 30282

I think that now I understand what is the problem...

I got two error messages in error_log:

Creating missing directory "/var/run/cups/certs"

And another

CUPS-Add-Modify-Printer: Unauthorized

And when I want to add new printer then it is not detected by gnome cups GUI.
And I can add this printer manually but is seems not to be connected anywhere.

Because in printer properties I can see that it is local printer and "Use a detected printer" field is inactive - I got "Use another printer by specifying a port" but Printer port is "hp no_device_found"

And there is printer icon in printers dialog and status is 'ready' but no printing at all.

If you can solve this I would be very happy because currently I can use this printer connected to another machine running windows.