[cups] forcing printout in colores, even on pages in b/w

[Helge Blischke]

> Am 21.06.2020 um 10:03 schrieb Matthias Apitz <guru at unixarea.de>:
> 
> 
> Hello,
> 
> I own on my home a laser jet printer of the type HP-Color-LaserJet-MFP-M277dw.
> which works nicely with cups version:
> 
> cups-2.2.10                    Common UNIX Printing System
> cups-filters-1.21.6            Additional backends, filters and other software for CUPS
> cups-pdf-2.6.1_4               Virtual printer for CUPS to produce PDF files
> 
> Since some weeks the printer shows the following problem: all printout
> in black and white (i.e. just printing a text file from the shell with
> 'lpr -Pps file.txt') comes out on the paper with stripes in magenta. A
> scanned examlpe is here: http://www.unixarea.de/HP-Color-LaserJet-MFP-M277dw.jpg
> If I print something with colors, for example with pictures or from
> Libreoffice with text in color, all is fine.
> 
> My question is, how could I force the printer via CUPS to always print
> in color, even if the text or Postscript file does not have anything in
> colors?
> 
> My other question, a bit off-topic, is here anyone who can imagine the
> reason of this problem with the printer? The printers web admin
> interface shows the three color toner yellow, blue and magenta in 70%
> and the black one in 50%. Any ideas?
> 
> Thanks
> 
> 	matthias

Try to print a self test page from the printer<#s web admin interface. I suspect you will
see the same effect. If so, it surely is a mechanical defect.

Helge