I can confirm that with my current configuration, with a new install based on Ubuntu Gnome Saucy, and with gksu installed, this authentication error has been eliminated. Perhaps you could consider gksu as a recommended dependency for the Ubuntu deb.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to hplip in Ubuntu. https://bugs.launchpad.net/bugs/1209246 Title: HPLIP GUI doesn't handle authentication properly Status in HP Linux Imaging and Printing: New Status in “hplip” package in Ubuntu: New Bug description: I installed hplip-gui hoping it would provide a graphical install process for a networked HP printer. Following through the install process for a networked printer, I found that the UI wasn't able to authenticate properly. Although the printer identity could be properly detected from its IP address, every time the hp-plugin install asked me for a password and the install failed, claiming it could not authenticate, even when I used the proper password for my account. My user account is an sudoer and is also a member of lpadmin. A workaround was to run... sudo hp-setup ...which then caused the printer drivers to be installed properly, though it failed with a dbus error when setting up the printer as it was running within sudo. I then proceeded to add the printer through the regular UI (which was also able to autodetect the printer from its IP address, and match the already auto-downloaded driver). Subsequent runs of the HPLip Toolbox from my regular user account were able to proceed to installing the printer. I think this is a simple issue of not properly negotiating the authentication of the user, either via a printer group, or possibly to cups. Given all the amazing work which has gone into HPlip-gui it seems a shame to fail with such a simple bug. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: hplip-gui 3.13.4-1build1 ProcVersionSignature: Ubuntu 3.10.0-6.17-generic 3.10.3 Uname: Linux 3.10.0-6-generic i686 ApportVersion: 2.12-0ubuntu2 Architecture: i386 Date: Wed Aug 7 14:43:36 2013 Lpstat: device for HP-LaserJet-400-colorMFP-M475dw: socket://148.88.141.83 MachineType: Dell Inc. Inspiron N5110 MarkForUpload: True PackageArchitecture: all Papersize: a4 PpdFiles: HP-LaserJet-400-colorMFP-M475dw: HP LJ 300-400 color MFP M375-M475 Postscript (recommended) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.10.0-6-generic root=UUID=c9767810-263a-424a-80cd-714fd4a9afa1 ro quiet splash vt.handoff=7 SourcePackage: hplip UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/03/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A11 dmi.board.name: 0HVRTT dmi.board.vendor: Dell Inc. dmi.board.version: A11 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA11:bd08/03/2012:svnDellInc.:pnInspironN5110:pvrNotSpecified:rvnDellInc.:rn0HVRTT:rvrA11:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Inspiron N5110 dmi.product.version: Not Specified dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/hplip/+bug/1209246/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp