Please follow the instructions in the section "CUPS error_log" on
https://wiki.ubuntu.com/DebuggingPrintingProblems.

In addition, please do the following:

Open a terminal window and there run the following commands:

sudo systemctl stop cups-browsed
sudo /usr/sbin/cups-browsed --debug 2>&1 | tee log.txt

Wait for the remote CUPS printers being picked up by cups-browsed (see
"lpstat -v" in another terminal window) and then do whatever was causing
the problem for you, like for example shutting down the system (with or
without running print jobs?).

After that, attach the error_log and log.txt here. Please do not
compress these files and do not package them together. Attach them one
after the other.

Thanks.


** Changed in: cups-filters (Ubuntu)
       Status: Confirmed => Incomplete

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to cups-filters in Ubuntu.
https://bugs.launchpad.net/bugs/1531902

Title:
  Stopping cups-browsed.service may stall shutdown/reboot

Status in cups-filters package in Ubuntu:
  Incomplete

Bug description:
  In an environment where remote cups printers are available, the cups
  browsed service does not stop cleanly causing the system
  shutdown/reboot to stall until its timeout (90 s) is reached.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: cups-browsed 1.4.0-1
  ProcVersionSignature: Ubuntu 4.3.0-5.16-generic 4.3.3
  Uname: Linux 4.3.0-5-generic x86_64
  ApportVersion: 2.19.3-0ubuntu2
  Architecture: amd64
  CupsErrorLog:
   E [07/Jan/2016:16:41:13 +0100] [Client 9] Returning IPP 
client-error-bad-request for CUPS-Add-Modify-Printer 
(ipp://localhost:631/printers/DESKJET-930C) from localhost
   E [07/Jan/2016:16:41:13 +0100] [Client 15] Returning IPP 
client-error-bad-request for CUPS-Add-Modify-Printer 
(ipp://localhost:631/printers/Roger-Router-Fax) from localhost
  CurrentDesktop: XFCE
  Date: Thu Jan  7 16:48:21 2016
  InstallationDate: Installed on 2015-11-03 (65 days ago)
  InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151102)
  Lpstat:
   device for DESKJET-930C: ipps://yo.local:631/printers/DESKJET-930C
   device for Roger-Router-Fax: ipps://yo.local:631/printers/Roger-Router-Fax
  MachineType: LENOVO 2767WSD
  Papersize: a4
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.3.0-5-generic 
root=UUID=fcf7f891-6fd7-4111-8dae-de9c7291b58f ro quiet splash
  SourcePackage: cups-filters
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/17/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7UET94WW (3.24 )
  dmi.board.name: 2767WSD
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr7UET94WW(3.24):bd10/17/2012:svnLENOVO:pn2767WSD:pvrThinkPadT400:rvnLENOVO:rn2767WSD:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2767WSD
  dmi.product.version: ThinkPad T400
  dmi.sys.vendor: LENOVO

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