Since reporting this issue, it appears to have resolved itself. The only changes were weekly updates for the OS.
I suggest you close this ticket. ** Changed in: system-config-printer (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to system-config-printer in Ubuntu. https://bugs.launchpad.net/bugs/1361819 Title: HP Officejet Pro 8500A Plus no longer auto detected Status in “system-config-printer” package in Ubuntu: New Bug description: Modem replaced. Modem, router and client PC were all rebooted. Network printer/scanner not found on Ubuntu 14.04 client PC with latest patches. Ping of IP address of printer is successful. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: system-config-printer-gnome 1.4.3+20140219-0ubuntu2.1 ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4 Uname: Linux 3.13.0-34-generic i686 ApportVersion: 2.14.1-0ubuntu3.3 Architecture: i386 CupsErrorLog: W [23/Aug/2014:15:28:40 -0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'HP-Officejet-Pro-8500-a909a-Gray..' already exists W [23/Aug/2014:15:28:40 -0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'HP-Officejet-Pro-8500-a909a-RGB..' already exists W [23/Aug/2014:15:34:59 -0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'HP-Officejet-Pro-8500-a909a-Gray..' already exists W [23/Aug/2014:15:34:59 -0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'HP-Officejet-Pro-8500-a909a-RGB..' already exists E [23/Aug/2014:15:35:05 -0400] [Job 21] The printer configuration is incorrect or the printer no longer exists. CurrentDesktop: Unity Date: Tue Aug 26 14:59:17 2014 EcryptfsInUse: Yes ExecutablePath: /usr/share/system-config-printer/system-config-printer.py InstallationDate: Installed on 2014-04-17 (130 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417) InterpreterPath: /usr/bin/python2.7 Lpstat: device for HP-Officejet-Pro-8500-a910: hp:/net/Officejet_Pro_8500_A910?ip=192.168.1.72 MachineType: Dell Inc. Inspiron 660 PackageArchitecture: all Papersize: letter PpdFiles: HP-Officejet-Pro-8500-a910: HP Officejet Pro 8500 a910, hpcups 3.14.3 ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-34-generic root=UUID=c3b17990-d8bf-4901-a821-1df2263a2e58 ro quiet splash vt.handoff=7 SourcePackage: system-config-printer UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/14/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A11 dmi.board.name: 084J0R dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA11:bd10/14/2013:svnDellInc.:pnInspiron660:pvr:rvnDellInc.:rn084J0R:rvrA00:cvnDellInc.:ct3:cvr: dmi.product.name: Inspiron 660 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/system-config-printer/+bug/1361819/+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