I think the problem here is CUPS' own method of generating temporary queues for discovered driverless printers. gnome-control-center, and probably other GUIs, like the GTK print dialog, cannot cope with this. So we leave this bug report assigned to gnome-control-center for now.
Christian, if you stop cups-browsed you have still auto-generated print queues. This is because CUPS itself kicks in here. If you run lpstat -e you see queue names which you do not see with lpstat -v The extra queue names are temporary CUPS queues. These are created by CUPS if you try to print on them or to access them in general, and they are removed by CUPS again after 1 minute of inactivity. gnome-control-center probably gets completely confused by that. It can have seen such a queue as actual queue, shortly after such a queue was used, and added it to its list. Now, more than a minute later, the user clicks on the entry, the queue is not there any more, and he gets something unexpected, an error message, an empty option dialog, a "(null):631". gnome-control-center and all other printing GUIs need to be adapted to CUPS' temporary print queues. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1813825 Title: "driverless" printer workflow has bad usability/ is partly broken Status in gnome-control-center package in Ubuntu: Incomplete Bug description: Hi, since Ubuntu uses IPP ("driverless") printing, I have a bad time using printers. I don't know exactly which package this bug belongs to, I think it is gnome-control-center. I have a Kyocera EcosysP6026cdn network printer, which provides a PPD file by the manufacturer. (But I tested this behaviour as well with other printers from eg. Brother, etc., and on Debian and Arch linux too). When I switch on the printer, after a few seconds, it is found in Ubuntu and installed automatically as "Kyocera_ECOSYS_P6026cdn". So far, so good. 1) I can't remove this printer. If I WANT to install it using another protocol (dnss etc), it adds another printer, and I have 2 Printers. So it should be easy to switch off "driverless" printing. 2) Using it as "Default printer" does not work. Clicking the cog wheel, and using the menu item "Use printer by default" is clickable, but it does not save any setting: "printers-cc-panel-WARNING **: 20:45:36.812: cups-pk-helper: setting default printer to Kyocera_ECOSYS_P6026cdn failed: client-error-not-found" 3) "Printing Options" opens an empty dialog, see screenshot attached. This dialog is useless. 4) The "Printer Detail" dialog shows a "null" address and links to "(null):631", which is a 404. I think this "driverless" printing is still in a very "unstable" state. It helps discovering printers in new Networks where I attach too with my laptop, and I can print there basically, But most of the day I use my own printer in my office or at home, and I want to have my special settings for exact this printer with color profile, duplex settings etc. And this all is not possible with driverless printing. So, if you don't "fix" all the not-working options in the UI, please at least give us an option to easily switch off driverless printing at all. I really prefer the "old school" way of installing printers. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.2 ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18 Uname: Linux 4.15.0-43-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Jan 29 19:34:39 2019 InstallationDate: Installed on 2019-01-27 (1 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1813825/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
