This problem occurred after an update was installed last week and I have found other references on the web with the same error after that recent update, so it appears that the update was flawed.
I have two laptops and one wireless printer. I added the printer through the CUPS web interface, but now the interface only returns the error “Firefox can’t establish a connection to the server at localhost:631.” I am not a programmer, but believe that # at the beginning of a line means that it is commented out. What is the unknown directive that needs to be commented out? Will such a change bring back the CUPS web interface? This is from the terminal. Do you see anything below that can be changed to fix the problem? dandola@ad-XPS-13-7390:~$ journalctl -xeu cups.service ░░ Subject: Automatic restarting of a unit has been scheduled ░░ Defined-By: systemd ░░ Support: http://www.ubuntu.com/support ░░ ░░ Automatic restarting of the unit cups.service has been scheduled, as the result for ░░ the configured Restart= setting for the unit. Dec 01 14:29:12 ad-XPS-13-7390 systemd[1]: Stopped CUPS Scheduler. ░░ Subject: A stop job for unit cups.service has finished ░░ Defined-By: systemd ░░ Support: http://www.ubuntu.com/support ░░ ░░ A stop job for unit cups.service has finished. ░░ ░░ The job identifier is 6757 and the job result is done. Dec 01 14:29:12 ad-XPS-13-7390 systemd[1]: Dependency failed for CUPS Scheduler. ░░ Subject: A start job for unit cups.service has failed ░░ Defined-By: systemd ░░ Support: http://www.ubuntu.com/support ░░ ░░ A start job for unit cups.service has finished with a failure. ░░ ░░ The job identifier is 6757 and the job result is dependency. Dec 01 14:29:12 ad-XPS-13-7390 systemd[1]: cups.service: Job cups.service/start failed with result 'dep> lines 695-717/717 (END) ░░ Subject: Automatic restarting of a unit has been scheduled ░░ Defined-By: systemd ░░ Support: http://www.ubuntu.com/support ░░ ░░ Automatic restarting of the unit cups.service has been scheduled, as the result for ░░ the configured Restart= setting for the unit. Dec 01 14:29:12 ad-XPS-13-7390 systemd[1]: Stopped CUPS Scheduler. ░░ Subject: A stop job for unit cups.service has finished ░░ Defined-By: systemd ░░ Support: http://www.ubuntu.com/support ░░ ░░ A stop job for unit cups.service has finished. ░░ ░░ The job identifier is 6757 and the job result is done. Dec 01 14:29:12 ad-XPS-13-7390 systemd[1]: Dependency failed for CUPS Scheduler. ░░ Subject: A start job for unit cups.service has failed ░░ Defined-By: systemd ░░ Support: http://www.ubuntu.com/support ░░ ░░ A start job for unit cups.service has finished with a failure. ░░ ░░ The job identifier is 6757 and the job result is dependency. Dec 01 14:29:12 ad-XPS-13-7390 systemd[1]: cups.service: Job cups.service/start failed with result 'depedency'. Your help is appreciated! On 12/1/25 1:23 PM, Marc Deslauriers wrote: > Thanks for the error message. > > Looks like this is the same issue as bug 2133207 > > I'm not sure what exactly is happening that folks are getting invalid > configuration files, but commenting that unknown directive at the end of > your /etc/cups/cupsd.conf should solve the problem. > > How are you typically adding printers on this system? Is it exclusively > through the web interface? Is this a desktop system or a server? > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2133488 Title: Firefox can’t establish a connection to the server at localhost:631. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/2133488/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
