The CUPS server is a CentOS-6 box. I should have mentioned I can explicitly add the queue manually - it's only the "automagic" method of dns-sd that doesn't work
ie on the Ubuntu laptop "Printers->Add->ipp://cups.server.name/printers/queueName" works just fine, the queue is added and I can print to it * cups-browsed is running * avahi-daemon is running on the laptop and is not needed on the server. I am WAN connected to the server, so broadcast/multicast methods are never going to work - that's the entire point of me trying dns-sd :-). Instead we have manually installed dns-sd related DNS records pointing to the CUPS server * avahi-discover wasn't installed on the laptop. After I installed it (also installed avahi-discover as a dependency), running it produced a GUI containing lots of local broadcast-based stuff (eg iphones, vnc, ssh; both ipv4/ipv6). Right at the bottom was "WAN", opening that showed our corporate DNS domain, but double-clicking on it didn't do anything - nor did a sniffer show any dns-sd* lookups. There is no "Internet Printer" nor "ipp*" section I have winbind installed (the Ubuntu laptop is AD integrated) and can see it doing Active-Directory related DNS SRV lookups, so DNS is definitely working, and if I manually lookup records like dig ptr b._dns-sd._udp.our.domain ...then I get directed appropriately, and following the chain down the rabbit hole I end up with the appropriate TXT and SRV records needed to use that IPP queue. But as the laptop doesn't do the initial dns-sd lookups, that cannot happen The /etc/cups/cups-browsed.conf file has CreateIPPPrinterQueues commented out, I uncommented that and restarted cupsd/cups-browsed and saw some DNS lookups for _services._dns-sd._udp.our.domain - but we don't have any records in there (and Macs don't seem to use that) ** Attachment added: "cups-browsed.conf" https://bugs.launchpad.net/ubuntu/+source/system-config-printer/+bug/1346118/+attachment/4159702/+files/cups-browsed.conf -- 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/1346118 Title: Printers app doesn't seem to do dns-sd Status in “system-config-printer” package in Ubuntu: Incomplete Bug description: I've just spent some time reconfiguring our DNS so that Macs could discover our CUPS print queues using dns-sd/bonjour I was surprised when I discovered this Ubuntu 14.04 laptop couldn't do the same thing. I have got a sniffer up watch all DNS traffic, and yet when I enter the "Printers" app to Add a printer, it shows no evidence of hanging whilst doing a scan, and certainly shows no DNS lookups for the standard PTR/SRV/TXT records used in dns-sd Is this supported by Ubuntu? I used to use Fedora and vaguely feel this worked in Gnome3? ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: system-config-printer-gnome 1.4.3+20140219-0ubuntu2.1 ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4 Uname: Linux 3.13.0-32-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 CupsErrorLog: E [21/Jul/2014:11:36:09 +1200] [Client 25] Returning IPP client-error-document-format-not-supported for Print-Job (ipp://localhost/printers/Generic-text-only) from localhost E [21/Jul/2014:11:42:31 +1200] [Job 13] Aborting job because it has no files. E [21/Jul/2014:12:02:08 +1200] [Client 26] Returning IPP client-error-bad-request for Create-Job (ipp://localhost:631/printers/MFC7340) from localhost E [21/Jul/2014:20:55:27 +1200] [Client 17] pam_authenticate() returned 7 (Authentication failure) E [21/Jul/2014:20:55:31 +1200] [Client 17] pam_authenticate() returned 7 (Authentication failure) CurrentDesktop: Unity Date: Mon Jul 21 21:12:08 2014 InstallationDate: Installed on 2014-05-01 (80 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) Lpstat: device for Cups-Email: ipp://192.168.248.3:631/printers/Cups-Email device for Cups-PDF: ipp://whanau.org:631/printers/Cups-Email device for MFC7340: ipp://192.168.248.3:631/printers/MFC7340 device for PRN-L1-IS-BW: ipps://crom.ap.trimblecorp.net/printers/PRN-L1-IS-BW MachineType: Dell Inc. Latitude E7440 PackageArchitecture: all Papersize: a4 PpdFiles: PRN-L1-IS-BW: Generic PostScript Printer Foomatic/Postscript (recommended) ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-32-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: system-config-printer UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/18/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A08 dmi.board.name: 03HFCG dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA08:bd02/18/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn03HFCG:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E7440 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. 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