I have found out what the issue is:
We have switched the printing workflow from PostScript to PDF as
standard print job format (see
https://blueprints.edge.launchpad.net/ubuntu/+spec/pdf-as-standard-
print-job-format). This means that jobs which reach a CUPS queue and
which are not in PDF format are converted to PDF before further
processing. After processing, the jobs get converted to the format
needed by the printer, in case of a PostScript printer back to
PostScript. See the Blueprint to know why we do this.
PostScript is not a simple vector graphics format. It is a programming
language, like Perl or Python. So one can make it generating the desired
print output in very different ways. This leads for example to the case
that some applications output PostScript on which you cannot separate
the pages so that you can re-order them for ptinting booklets or simply
print only a part of the pages. This is one of the reasons why we want
to use PDF as standard print job format.
Another example for using the capabilities of PostScript as a
programming language is the CUPS test page. It asks the PostScript
interpreter for certain data of the output device and writes the results
into the output. This only works if the PostScript interpreter which
renders the test page is the actual rasterizer for the printer and not a
file converter which renders the PostScript into an intermediate vector
graphics format. In our PDF printing workflow the test page is converted
to PDF with the interpreter not knowing the resolution and the margins
of the printer. Therefore the test page shows wrong margin and
resolution data and it draws the black border rectangle at the wrong
place. This means that the CUPS test page is completely unsuitable for
the PDF printing environment. We should take it from the distro. The
test page should be a scalable PDF file.
** Changed in: cupsys (Ubuntu)
Importance: Undecided => Medium
Status: Invalid => Triaged
** Changed in: system-config-printer (Ubuntu)
Status: New => Invalid
** Summary changed:
- brother mfc-7820 not working with cupsys 1.3.8
+ CUPS test page not suitable for PDF printing workflow, needs to be replaced
--
CUPS test page not suitable for PDF printing workflow, needs to be replaced
https://bugs.launchpad.net/bugs/263049
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