FYI: USB printer not automatically installed

Unlike Ubuntu MATE 24.04, Trisquel 12.0 didn't automatically install my Brother HL-L5210DW monochrome laser via USB (as a driverless, IPP Everywhere printer). Here's how I got my printer installed and working.

Note that the printer was automatically *recognized* (just not automatically installed). I used the lpstat command to get the recognized printer name:

$ lpstat -e
Brother_HL_L5210DW_series_USB

I needed to use this exact name in order to prevent duplicate printer entries in the Print dialog box.

I then used the lpinfo command to get a list of available devices. My printer was at the very end:

$ lpinfo -v
...[other entries here]...
network ipp://Brother%20HL-L5210DW%20series%20(USB)._ipp._tcp.local/

The easiest way to install the printer was with the following command:

$ sudo lpadmin -p -E -v "" -m everywhere

where is from the output of the lpstat -e command and is from the output of the lpinfo -v command. The command I used was:

$ sudo lpadmin -p Brother_HL_L5210DW_series_USB -E -v "ipp://Brother%20HL-L5210DW%20series%20(USB)._ipp._tcp.local/" -m everywhere

Alternatively, I was also able to install the printer using the CUPS browser-based interface (http://localhost:631/).

For the printer name, I used the exact printer name from the lpstat -e command.

For Make, I selected Brother (substitute your printer brand here).

For Model, I selected IPP Everywhere (the first entry in the list).

I wasn't able to add the printer using the Printers app that comes with Trisquel because it doesn't have the option to specify IPP Everywhere for the Model.