I lost 3 days hunting this "bug", after reading the code and experiencing with many file permissions, I've found how to "fix" it... then I was about to report this "bug" I found this report... holy sh*t.
Guys, if you want to disable the web admin, do it properly... or don't do it at all. I can just support what MANU said. Also, if you use the web-admin the way ubuntu ships you get 100% CPU usage, the cupsd process loops forever and you can hang your machine (if it's a slow one, like mine). -- error when adding a CUPS printer through web interface: cupsdAuthorize: pam_authenticate() returned 7 (Authentication failure) https://launchpad.net/bugs/47892 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs