It means you need to install the cups package. If you want that, you can install it by running the following command in the terminal:
sudo apt install cups
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Thanks Skalman. I’ll check it out.
My problem seems to be that the print jobs disappear… somewhere. Even got messages telling me the print was successful but the printer has done nothing. Not a peep nor a blink. Perplexing. This works with my linux desktop “out of the box”. Print queue shows the job and recognizes the printer in 631. Cups installed. Using USB-cable. Any ideas, anyone?
To connect what to what?
By writing “631” I would take that as a reference to the TCP port number for the Internet Printing Protocol (IPP). In my experience cups normally listens on localhost (IPv4 and, where applicable, also IPv6) on that port. But that doesn’t say much about how CUPS communicates with the printer itself.
There’s a bit too much information missing. What are the capabilities of the printer?
Is it networked? If so, ethernet and/or WiFi?
WiFi direct?
Not networked at all and only connects to the host via USB?
What functionality and/or protocols are enabled on the printer?
sudo netstat -antp | grep :631
will show what use your computer is making of port 631.
Just too abbreviated. 631 refered to previously mentioned https://localhost:631/admin/conf and USB-cable between L5 and printer (as in not wireless/wifi). Printer is generic HP2050 which works with other linux distros “plug-and-play”.
Just guessing …
Anything in the system journal?
Permissions problem on a device? (Could explain why it works on other computers.) Can you tell from the printer configuration what device it is attempting to use?
Best would be enabling the CUPS debug log in cupsd.conf:
# Log general information in error_log - change "warn" to "debug"
# for troubleshooting...
LogLevel warn
PageLogFormat
Thanks for the leads, will try them tomorrow (today just disappeared somewhere).