Canon ImageClass MF4770n will not work without proprietary software, it seems.
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At my workplace we have a Canon Imageclass MF4770n printer that we've had for several years but stopped using at some point for some reason. I wanted to try to get it working with Trisquel, but it seems like I won't be able to without installing proprietary software from Canon.
I found a Canon website that lists the printer [1], and the UFR II printer driver package contains a free ppd file, but when I try to add the printer with the ppd file, I get an error message saying that /usr/lib/cups/filter/rastertoufr2 is required, and this seems like a proprietary file included in the Canon driver package.
Curiously, on Microsoft Windows the printer says "Driver is unavailable", and the printer is not shown as an option in Chrome. Additionally, the Canon website I linked does not even provide a driver for Windows. So maybe I am missing something important, because it would seem surprising if the printer does work with Windows, especially when I think it did in the past.
It seems like the printer requires installing proprietary software in order to print from Trisquel. Does anyone know if whether I have come to the correct conclusion?
I am not sure if your printer is a laser or inkjet. Have you tried installing printer-driver-cjet for lasers?
I had tried installing printer-driver-cjet and searching for drivers again, and it still didn't find anything. Just to be sure, I just now tried rebooting after installing, and it still doesn't find any driver automatically, and it's not in the list of models when I try to look for a driver manually.
It turns out the information I heard about the printer working in the past was just about copying existing pages by pressing buttons on the printer directly. The printer has not actually worked with Windows in the past.