I can reproduce the bug. cups-browsed hangs on shutdown when CUPS is not
running any more. One can simply do
sudo systemctl stop cups
and after some seconds
sudo systemctl stop cups-browsed
with the shutdown of cups-browsed hanging.
Problem is that during shutdown cups-browsed accesses CUPS to remove
print queues and save option settings.
Solution is to modify systemd *.service files to assure that on shutdown
cups-browsed shuts down before CUPS.
** Changed in: cups (Ubuntu)
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/1579905
Title:
cups-browsed causes shutdown hang/delay in Ubuntu 16.04
Status in cups package in Ubuntu:
Triaged
Bug description:
Using the debug process found here
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1464917 I have
determined that the cause of my 16.04 install's shutdown hang is cups-
browsed. It was the only process running when I did a systemctl list-
jobs in the VT9 shell. If I do sudo service cups-browsed stop and
then shutdown, I do not get a hang.
I have confirmed this on a virtual machine and a real system. If I
disable cups-browsed from ever starting, my problem is fixed.
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https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1579905/+subscriptions
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