Sorry for this comment flood. Now I think I have finally solved it out:
If I run cupsd -l in console, it just quits with exit status 0 after a while. If I run it as a service, it exits but goes back on-line immediately after I do something that needs printing service. It almost looks like there is some kind of resource-saving feature here that does not take the Web UI into account. This seems to be a duplicate of #1598300 (https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1598300). -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1622707 Title: CUPS Web UI stops responding after a while Status in cups package in Ubuntu: New Bug description: CUPS Web administration UI available at localhost:631 stops responding after a while. Initially it works fine, but after it has been running for a moment it just shows the "Connection refused" message of the browser. The printing system keeps running otherwise. This is a clean install of Ubuntu. I have installed Seafile from PPA but I don't think it has anything to do with this. I am unable to find anything relevant from journalctl nor CUPS logs. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: cups 2.1.3-4 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CupsErrorLog: CurrentDesktop: Unity Date: Mon Sep 12 21:10:33 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-09-12 (0 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No destinations added. MachineType: Dell Inc. Latitude E6320 Papersize: a4 ProcEnviron: LANGUAGE=fi PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fi_FI.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed root=UUID=0b75be02-897e-4a0b-9ff6-441512bb7493 ro quiet splash vt.handoff=7 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/14/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A19 dmi.board.name: 05VMY6 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA19:bd11/14/2013:svnDellInc.:pnLatitudeE6320:pvr01:rvnDellInc.:rn05VMY6:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6320 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1622707/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
