If you followed my previous article about setting up the Brother HL-2170W under Linux, and attempted to print a self-test page, you may hav e gotten the following less-than-helpful error message:
Print Self-Test Page Brother Error
Unable to send command to printer driver!
Unsupported format ‘application/vnd.cups-command’!
Two bugs have been reported against this in Launchpad (36532 and 510781) and one in Debian (381743), but the end result is that there are two options, “Print Test Page” and “Print Self Test Page.” The “Self-Test” is what generates the error. If you use the “Test Page”, it seems to work without error. The Launchpad pages show fixes/workarounds, but if printing works fine for you, it may be easier to simply let it be until it’s fixed upstream.
Questions, comments, and feedback are welcome in the comments.