Brother ship mystery meat linux "drivers" that have a PPD that sends your document through Ghostscript I guess to scrub PostScript that the printer doesn't support.
I tried just using a generic PPD from openprinting.org but that caused the printer to spit out a ream of pages printed with binary junk, so mystery drivers it is.
I tried just using a generic PPD from openprinting.org but that caused the printer to spit out a ream of pages printed with binary junk, so mystery drivers it is.