Public bug reported:

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.

** Affects: cups (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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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.

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