I'm sorry the filter didn't work for you. I'm not using OpenBSD as a
desktop right now, but I abused my router a bit to test, and can confirm
that with an HL-L2370DW, the following printcap entry works, along with
the filter. I know you've basically already moved on, but if you feel like
giving it a try again, here's at least something. I can't remember if I
mentioned it, but the filter does require ghostscript to be installed.
I'm not sure exactly how you're trying to print or from what, but this
printed a standard PDF file using `lpr file.pdf' without issue.
/etc/printcap:
lp|HLL2370DW:\
:lp=:rm=printer.localdomain:rp=BINARY_P1:sd=/var/spool/output/lpd:\
:lf=/var/log/lpd-errs:of=/usr/bin/pclfilter
/usr/bin/pclfilter:
#!/bin/sh
gs -sPAPERSIZE=letter -sDEVICE=pxlmono -sOutputFile=- -dBATCH -dNOPAUSE
-dQUIET -
