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I'm running slackware 13.37 on an HP pavillion g series. I'm trying to add a printer. I run "Manage Printers" which opens up http://localhost:631/ in my browser. I press the 'Add Printer" button and get a pop-up window titled, "Authentication Required", with the text, "A username and password are being requested by http://localhost:631. The site says: 'CUPS' " over two fields labeled 'User Name' and 'Password'.

Neither my username and password nor root's username and password are accepted. Does anyone know what is going on here and how I can get CUPS to recognize valid username-password pairs?

Thanks.

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As sometimes happens, after I posted this I got an idea to checkout by asking myself, "what's the dumbest thing it might be?" The answer was "slackware didn't give root privileges to the printer group when it was installed." Sure enough, I opened up /etc/group and lp had no user that could use it. I'm going to contact Slackware and tell them. –  bev Sep 29 '11 at 2:40
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