Since upgrade from 20.04 → 22.04 ; unable to print in color, only black and white

[Coeur Noir]

Hi,

Printer ( in my context ) is Ricoh Aficio mpc 3002 and most Ricoh's drivers are open-source ( https://www.openprinting.org/printer/Ricoh/Ricoh-Aficio_MP_C3002 )

Since I « upgraded » my installation from 20.04 → 22.04, I'm unable to print in colors, only black and white, whatever I set in driver.

I tried what's suggested in
⋅ https://askubuntu.com/questions/1410583/upgrading-to-22-04-printer-doesnt-works-in-color
⋅ https://discourse.ubuntubudgie.org/t/22-04-unable-to-add-printer-which-perfectly-worked-in-20-04/6209

I might go wrong somewhere cause I still can't manage to print in color.
→ the snap thing ( Gutenprint Printer Application ) does not detect my ( network ) printer,
→ I'm not sure of the name for PRINTER I should input in command « lpadmin -p PRINTER -o print-color-mode-default=color » ( and is this as normal user or sudo ? )

It seems related to
⋅ https://github.com/OpenPrinting/cups/issues/421

It's a regression ( as it used to work out of the box before 22.04 ).

[Coeur Noir (coeur-noir)]

See also https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1971242

But here I don't « manually » make use of cups.

With those kinds of Ricoh printers, for years it's just plug'n'play sort of speaking.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Karl Testano (karlte)]

Hi,

i found the the same problem, but my printer is a Samsung C480X.
The printer works normally great under 20.04, but after update
no color printing anymore. Under 20.04 i install the Samsung ULD
driver from the Samsung (HP) web site.

What i found (unfortunatly i had no time to look deeper in the function);
I think, the problem is not a problem of the printer driver or ppd-file.

If you start with a fresh install Ubuntu 22.04, printers are found by
cups-browsed, no matter if network printer or usb printer.

Also the Samsung C480X will be found (without installing the Samsung ULD
printer driver). My point of intrest was the network printing.

With the system-config-printer i set up the printer as "implicit://<printername>"
and set the driver to cups driverless. With this configuration the printer could
produce colored pages.

The cups web interface (http://localhost:631) and kde-printer show the new installed
printer correctly.

Before this i changed the printer name with the web interface of the printer from
Samsung C48x (SEC12345678) to SEC12345678. This name has no blanks and () in it
and seemed to be better appropriated by cups.

But:
After reboot cups-browsed (is my assumption) rewrites the file /etc/printers.conf and
you have to configure the printer again.

Q&D Workaround: (not for production)
Set using chattr "i"-Flag for printers.conf*, and it works fine.

Perhaps somebody is able to find the error in the cups-system.

Thanks in advance!
karlte

[Ian Gordon (ian-gordon)]

I suspect this problem is caused by this issue (https://github.com/OpenPrinting/cups/pull/500) that is fixed in cups where the option print-color-mode is set to monochrome when the printer PPD file has ColorModel: CMYK and not ColorModel: RGB (Our Ricoh C4500 uses CMYK as its ColorModel: CMYK)

We were trying to use

lpadmin -p <printername> -o print-color-mode-default=colour
lpadmin -p <printername> -o print-color-mode=colour

and this worked the first time we printed to the printer and then it would reset to "monochrome" which I suspect is caused by this report typo: https://github.com/OpenPrinting/cups/pull/687

Cheers,

Ian.

PS Failed to note this was a duplicate bug before posting. Apologies. And I see it is already know in #1971242 that the latest version of cups fixes the issue