Sample PPD file for the SRU test plan.
** Description changed:
After upgrading from 20.04 LTS to 22.04 LTS I can't print colored PDF
document. The print appears always b/w regardless color printing was
enabled or not. Printing from LibreOffice produces a color print. This
behavior (bug) is reproducible on three upgraded machines. It would be
nice to have color print back again.
+
+ [ Impact ]
+
+ If the PPD file for a printer has a ColorModel option and the only
+ choice in it for printing in color is not named RGB but CMYK instead,
+ the printer cannot be made printing in color with intuitive methods,
+ usually selcting the color choice in the print dialog (which makes
+ ColorModel=CMYK be sent along with the job).
+
+ Only an ugly command-line-based workaround, running the command
+
+ lpadmin -p PRINTER -o print-color-mode-default=color
+
+ makes the printer print in color.
+
+ An example for printers with such PPDs are printers from RICOH and OEM
+ (Lanier, InfoTec, Savin, ..), so many high-end color laser printers are
+ affected.
+
+ [ Test Plan ]
+
+ Remove the workaround if you had applied it:
+
+ lpadmin -p PRINTER -R print-color-mode-default
+
+ If you have an affected printer, print a PDF file (or use the print
+ functionality in an application) with colored content and choose the
+ setting for color printing in the print dialog. When printing via
+ command line do
+
+ lp -d PRINTER -o ColorModel=CMYK FILE.pdf
+
+ Without the SRU applied you will get a grayscale/monochrome printout,
+ with it applied, you will get a colored printout.
+
+ To test without a printer:
+
+ Stop CUPS:
+
+ sudo systemctl stop cups
+
+ Edit /etc/cups/cups-files.conf to have a line
+
+ FiileDevice Yes
+
+ ans start CUPS again:
+
+ sudo systemctl start cups
+
+ Then create a queue using the attached sample PPD file:
+
+ lpadmin -p color-test -E -v file:/tmp/printout -P Ricoh-PDF_Printer-
+ PDF.ppd
+
+ Print a file to this queue as described above. When the job is done
+ ("lpstat" does not show it any more), open /tmp/printout with a text
+ editor. Chcke whether it contains a line
+
+ @PJL SET RENDERMODE=COLOR
+
+ near its beginning, and NOT a line
+
+ @PJL SET RENDERMODE=GRAYSCALE
+
+ [ Where problems could occur ]
+
+ The patches are simple and they are also for some time in newer CUPS
+ versions (2.4.2 and newer) which are included in several distributions
+ (Ubuntu 22.10, 23.04, and others) and did not cause any complaints about
+ color printing. So the regression potential is very low.
** Attachment added: "Ricoh-PDF_Printer-PDF.ppd"
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1971242/+attachment/5679703/+files/Ricoh-PDF_Printer-PDF.ppd
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https://bugs.launchpad.net/bugs/1971242
Title:
printing PDF appears always grey, no color
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