Network printers (cups-browsed) disappear after each CUPS update on client side

[MichaelB]

Hi,

We have a cups server (ubuntu) that centralize all our network printers. Each desktop users on Ubuntu (16.04, 18.04) are looking in that print server to retrieve those printers. It works fine but...

# /etc/cups/cups-browsed.conf in a desktop user
...
BrowseRemoteProtocols cups dnssd
BrowsePoll 192.168.10.80:631 # CUPS server
...

Each time that an CUPS update is applied on the client side all printers disappear from the listing and users are unable to print. So i have to connect to xxx computers in our company to restart the cups-browsed service...

This problem exist from some years.. but still not resolved and i didn't found a way to fix it.

Workaround:
- sudo service cups-browsed restart OR reboot the computer

Thanks!

[MichaelB (mrbou)]

Just a few more information about this issue.
This is the cups-browsed's state just after a cups update... is dead...

root@foo-ubuntu:/home/foo# service cups-browsed status
● cups-browsed.service - Make remote CUPS printers available locally
   Loaded: loaded (/lib/systemd/system/cups-browsed.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since ven 2019-06-14 14:51:38 CEST; 2min 27s ago
 Main PID: 927 (code=exited, status=0/SUCCESS)

jun 14 14:35:02 foo-ubuntu systemd[1]: Started Make remote CUPS printers available locally.
jun 14 14:51:38 foo-ubuntu systemd[1]: Stopping Make remote CUPS printers available locally...
jun 14 14:51:38 foo-ubuntu systemd[1]: Stopped Make remote CUPS printers available locally.

And here the syslog just when update is applied...

Jun 14 14:51:32 foo-ubuntu systemd[1]: Stopped Daily apt upgrade and clean activities.
Jun 14 14:51:32 foo-ubuntu systemd[1]: Stopped Daily apt download activities.
Jun 14 14:51:32 foo-ubuntu systemd[1]: Reloading.
Jun 14 14:51:32 foo-ubuntu systemd[1]: Started CUPS Scheduler.
Jun 14 14:51:32 foo-ubuntu systemd[1]: Started ACPI event daemon.
Jun 14 14:51:34 foo-ubuntu systemd[1]: Reloading.
Jun 14 14:51:34 foo-ubuntu systemd[1]: Started CUPS Scheduler.
Jun 14 14:51:34 foo-ubuntu systemd[1]: Started ACPI event daemon.
Jun 14 14:51:34 foo-ubuntu systemd[1]: Started Daily apt upgrade and clean activities.
Jun 14 14:51:34 foo-ubuntu systemd[1]: Started Daily apt download activities.
Jun 14 14:51:37 foo-ubuntu gnome-session[1647]: debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permission denied
Jun 14 14:51:38 foo-ubuntu systemd[1]: Stopped CUPS Scheduler.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Reloading.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Started ACPI event daemon.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Stopping Make remote CUPS printers available locally...
Jun 14 14:51:38 foo-ubuntu systemd[1]: Stopped Make remote CUPS printers available locally.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Stopping CUPS Scheduler...
Jun 14 14:51:38 foo-ubuntu systemd[1]: Stopped CUPS Scheduler.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Reloading.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Started ACPI event daemon.
Jun 14 14:51:38 foo-ubuntu systemd[1]: Reloading.
Jun 14 14:51:39 foo-ubuntu systemd[1]: Started ACPI event daemon.
Jun 14 14:51:41 foo-ubuntu systemd[1]: Reloading.
Jun 14 14:51:42 foo-ubuntu systemd[1]: Started ACPI event daemon.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.