On 2020-06-01 9:23 a.m., Peter King via talk wrote:
Brother advertises "PostScript 3 Emulation" which I thought was code for
using Ghostscript or whatever.
I just checked: the Brother MFC-L2750DW I have *does* claim to have
BR-Script3 and PCL6, but IPP doesn't need to use it. CUPS will usually
convert PostScript to PDF in the print process anyway, so BR-Script3
doesn't add anything.
Your Lexmark claims to support IPP. This will only work if you're
talking to it over a network. Direct USB connection brings problems.
*Some* IPP printers support IPP over USB, and the ippusbxd or ipp-usb
daemons enable it. I don't know if this is supported by your printer.
Can you find your printer via IPP? Try:
$ ippfind
ipp://BRWD89C6730425A.local:631/ipp/print
I get that from my Brother printer. To find what formats your printer
supports, try ipptool with the URL returned above and one of the system
test scripts:
$ ipptool -vt ipp://BRWD89C6730425A.local:631/ipp/print
get-printer-attributes.test | grep document-format-supported
document-format-supported (1setOf mimeMediaType) =
application/octet-stream,image/urf,image/pwg-raster
So I see my printer only accepts the two CUPS/IPP raster formats. That's
fine: better to do the rasterization inside a fast desktop than rely on
some PS/PDF RIP of unknown capability in your printer.
It looks like cups 2.3.3-1 for Arch includes ippfind and ipptool, and
requires/includes Avahi for printer discovery.
I wish I could help more. Printing now is genuinely "forget everything".
It's not like I'm accepting lower-quality printing with IPP, either.
cheers,
Stewart
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