Re: [NTG-context] LMTX generates PDFs with non-working fonts on real printers

Now! I am astonished about this blog! Super that you, Leah and Hans, insisted to find out what the culprit was! Thank you both so much for your effort! Kind regards Willi

On 11 Oct 2022, at 21:07, Leah Neukirchen via ntg-context wrote:

Hans Hagen via ntg-context writes:

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On 10/9/2022 8:03 AM, Max Chernoff via ntg-context wrote:

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Hi all,

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I use LuaMetaTeX 2.10 20220918 + ConTeXt LMTX 2022.09.11.

Here's a tiny test document, I disabled PDF compression but it also doesn't work with the default settings.

\setupbackend[level=0,compresslevel=0] \starttext Just a line of text. \stoptext

When I print this "directly" (i.e. sending the raw PDF to the printer) on a Ricoh MP3053 or on a Samsung CLP-680DW, I just get an empty page. Just to add some more data points, I tested the attached MkXL file on two printers, and the file printed perfectly on both. Printer 1: Brother HL-3170CDW Printed via running "cat test.mkxl.pdf | nc Colour-Printer.local 9100" Printer 2: HP M227f LaserJet Printed from the PDF file on a USB stick Neither printer is anything fancy; they're both fairly inexpensive home laser printers. I've got a much older Brother laser printer that I may be able to test with next week. Sorry I can't be of more help. Leah and I are zooming in on the issue. It might relate to wrong font matrix default behavior in the pdf printer driver, and GS got a fix for that long ago, so maybe old printers with not-updated drivers can be affected.

Once we're confident that we can catch it Leah (who does the low level introspective testing with viewers, printers and tools) likely will report on it and there will be a test file for users to test if what we do is okay before we apply the safeguard.

There's a write up now on the issue: https://leahneukirchen.org/blog/archive/2022/10/50-blank-pages-or-black-box-...

-- Leah Neukirchen https://leahneukirchen.org/ ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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