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[Andy Pearson <2113980@xxxxxxxxxxxxxxxxxx>]

Hi and thank you for the reply! I have checked and the missing settings
are not present in any of the tabs on the GTK4 print dialog. There are
also some settings that do show in the GTK4 dialog that are not relevant
-- for example, I see ipp-attribute-fidelity, but the printer is not set
up using IPP. It seems to me that the GTK4 dialog is loading a default
set of attributes for IPP without accessing any of my printer's actual
options or functions, which are not IPP-based.

In addition, printing via the GTK4 dialog doesn't work -- no job is
actually registered in CUPS or sent to the printer, regardless of which
print job options I set.

Would it be useful for me to send screenshots of each print dialog tab
in GTK4 and GTK3 to compare?

-- 
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https://bugs.launchpad.net/bugs/2113980

Title:
  GTK4 print dialog does not seem to load filter settings on 25.04

Status in gtk4 package in Ubuntu:
  Incomplete

Bug description:
  The print dialog box in Papers and Gnome Text Editor on 25.04 does not
  appear to load settings correctly from non IPP printers, making it
  impossible to print to devices that show up correctly in CUPS and are
  accessible from other non-GTK4 programs. These are settings like print
  quality, double siding, color/bw, and advanced color adjustments.

  I started using Papers as my PDF viewer after upgrading to Ubuntu
  25.04 where it replaced Evince. I have several printers which use non
  IPP drivers, requiring the installation of PPD and filter files in
  CUPS. These are all set up and working correctly in CUPS, and I have
  no problems with non-GTK4 programs on my computer that are capable of
  printing. I was also able to print with no trouble from Gnome Text
  Editor under 24.10. When I access the CUPS browser-based control
  panel, all the options for my printers are present and working.

  However, on 25.04 in Papers and Gnome Text Editor, the print job settings that are specific to the printer do not load correctly into the print dialog box. Instead of seeing the settings I should have access to, I see IPP default controls which don't relate to my printer's capabilities. When I try to print on Papers, it doesn't seem to throw an error but CUPS never registers the print job, and nothing is actually printed.
  As far as I can tell, IPP printers work just fine.

  I have attached a screenshot of the print dialog in Papers, viewing
  the Advanced tab, attempting to print to a Brother MFCJ6530DW, using
  Brother's driver and filter. The settings that are visible are not
  relevant to the printer and are different from what shows up in other
  programs including Firefox, Thunderbird, LibreOffice, and non-GTK4 PDF
  viewers.

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