Since the bug report is very old, the original cause for what is described here may have changed. But on a focal system, the gtk print dialog populates the printer list on its own. Even if cups is not running locally, it queries avahi-daemon and produces a list of printers. This is causing a number of issues, including printer duplicates, printer entries that don't work, printers that are labeled in a weird way etc. It is silly that such broken behaviour cannot be turned off. In any case, until this improves, users may choose to use a patched version of gtk3 where the broken avahi lookup is removed from the printer dialog:
https://launchpad.net/~launchpad-weyland/+archive/ubuntu/libgtk3-no- avahi/ Also see lp:1379359 and lp:1753509 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1477106 Title: Cups directive "Browsing Off" ignored by print dialog Status in gtk+3.0 package in Ubuntu: New Bug description: On Ubuntu 15.04, I have cups configured with the "Browsing Off" option in the /etc/cups/cupsd.conf to disallow listing non local printers (I'm on a huge network where there are many printers). This works well with non Gnome applications (LibreOffice, Adobe Reader for example). But the print dialog of Gnome GTK3 applications seems to ignore the "Browsing Off" directive and lists a lot of remote printers... The same problem arises with Gnome GTK2 applications... cups version: 2.0.2-1ubuntu3.2 gtk3 version: 3.14.13-0ubuntu1 gtk2 version: 2.24.27-0ubuntu1 The package cups-browsed is not installed. Here is the content of my cupsd.conf: # # Configuration file for the CUPS scheduler. See "man cupsd.conf" for a # complete description of this file. # # Log general information in error_log - change "warn" to "debug" # for troubleshooting... LogLevel warn PageLogFormat # Deactivate CUPS' internal logrotating, as we provide a better one, especially # LogLevel debug2 gets usable now MaxLogSize 0 # Only listen for connections from the local machine. Listen localhost:631 Listen /var/run/cups/cups.sock # Show shared printers on the local network. Browsing Off BrowseLocalProtocols dnssd # Default authentication type, when authentication is required... DefaultAuthType Basic # Web interface setting... WebInterface Yes # Restrict access to the server... <Location /> Order allow,deny </Location> # Restrict access to the admin pages... <Location /admin> Order allow,deny </Location> # Restrict access to configuration files... <Location /admin/conf> AuthType Default Require user @SYSTEM Order allow,deny </Location> # Set the default printer/job policies... <Policy default> # Job/subscription privacy... JobPrivateAccess default JobPrivateValues default SubscriptionPrivateAccess default SubscriptionPrivateValues default # Job-related operations must be done by the owner or an administrator... <Limit Create-Job Print-Job Print-URI Validate-Job> Order deny,allow </Limit> <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job Cancel-My-Jobs Close-Job CUPS-Move-Job CUPS-Get-Document> Require user @OWNER @SYSTEM Order deny,allow </Limit> # All administration operations require an administrator to authenticate... <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default CUPS-Get-Devices> AuthType Default Require user @SYSTEM Order deny,allow </Limit> # All printer operations require a printer operator to authenticate... <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After Cancel-Jobs CUPS-Accept-Jobs CUPS-Reject-Jobs> AuthType Default Require user @SYSTEM Order deny,allow </Limit> # Only the owner or an administrator can cancel or authenticate a job... <Limit Cancel-Job CUPS-Authenticate-Job> Require user @OWNER @SYSTEM Order deny,allow </Limit> <Limit All> Order deny,allow </Limit> </Policy> # Set the authenticated printer/job policies... <Policy authenticated> # Job/subscription privacy... JobPrivateAccess default JobPrivateValues default SubscriptionPrivateAccess default SubscriptionPrivateValues default # Job-related operations must be done by the owner or an administrator... <Limit Create-Job Print-Job Print-URI Validate-Job> AuthType Default Order deny,allow </Limit> <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job Cancel-My-Jobs Close-Job CUPS-Move-Job CUPS-Get-Document> AuthType Default Require user @OWNER @SYSTEM Order deny,allow </Limit> # All administration operations require an administrator to authenticate... <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default> AuthType Default Require user @SYSTEM Order deny,allow </Limit> # All printer operations require a printer operator to authenticate... <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After Cancel-Jobs CUPS-Accept-Jobs CUPS-Reject-Jobs> AuthType Default Require user @SYSTEM Order deny,allow </Limit> # Only the owner or an administrator can cancel or authenticate a job... <Limit Cancel-Job CUPS-Authenticate-Job> AuthType Default Require user @OWNER @SYSTEM Order deny,allow </Limit> <Limit All> Order deny,allow </Limit> </Policy> To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1477106/+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
