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In Ubuntu 20.04 in the GUI settings, printers - I get the message 'Sorry! The system printing service doesn't seem to be available'.

I have a Canon MF643Cdw printer on wi-fi. CUPS seems to be working fine (no errors in systemctl). I can even print the test page from localhost:631 using either no driver or the canon UFR 2 driver,

system-config-printer-gnome 1.5.12-0ubuntu1.1 is installed.

I've tried this solution to no avail. I've also tried purging and installing cups again with apt.

The canon printer utility can't find the printer in it's network IP address either.

Interestingly, lpinfo -m says: Bad file descriptor

Any help/advice is appreciated.

Ondrej Sotolar
  • 393
  • Bad file descriptor usually means cups daemom is not running. – brian_p Mar 30 '21 at 23:14
  • @brian_p I've checked with systemctl status cups. All is running with no errors. The webpage with cups settings is also running. Should I check the daemon any other way? – Ondrej Sotolar Mar 31 '21 at 15:33

1 Answers1

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Add the name of the localhost cups server into /etc/cups/client.conf

ServerName localhost:631

Restart the cups service

sudo systemctl restart cups

The UI works now.

Ondrej Sotolar
  • 393