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[Nick Rosbrook <2128983@xxxxxxxxxxxxxxxxxx>]

** Changed in: cpdb-backend-cups (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/2128983

Title:
  cpdb-backend-cups delays first print job and causes empty initial
  print dialog (Ubuntu 25.10, Wi-Fi printers)

Status in cpdb-backend-cups package in Ubuntu:
  Incomplete

Bug description:
  **Summary**
  When printing from GTK4/GNOME applications (Evince, Gedit, etc.) on Ubuntu 25.10,
  the print dialog is slow to appear (5–10 seconds) and the first print job is lost.
  The second attempt always works.

  **System**
  - Ubuntu 25.10 (Questing Quokka) x86_64
  - GNOME 46 / GTK 4.14
  - cpdb-backend-cups 2.0b7-0ubuntu2
  - cpdb-libs 2.0b7-0ubuntu2
  - cups 3.x (daemon sandboxed by systemd)
  - Printer: HP OfficeJet 250 Mobile (IPP Everywhere, Wi-Fi)

  **Steps to reproduce**
  1. Boot the system and log in.
  2. Open a GNOME/GTK4 app (e.g. Evince).
  3. Open “Print…” → long delay before dialog appears.
  4. Send first print → no entry in `lpstat -t`, nothing printed.
  5. Send same document again → job prints normally.

  **Expected result**
  Print dialog should appear instantly and the first job should print successfully.

  **Observed result**
  Initial D-Bus communication with `cpdb-backend-cups` times out or fails silently.
  Journal shows connection resets and backend re-initialisation.

  **Logs**
  (attach `print-trace.log`)

  
  ```sh
  dpkg -l cpdb-backend-cups cpdb-libs cups | grep ^ii
  busctl --user list | grep org.openprinting
  dpkg-query: aucun paquet ne correspond à cpdb-libs
  ii  cpdb-backend-cups 2.0b7-0ubuntu2  amd64        Common Print Dialog Backends - CUPS/IPP Backend
  ii  cups              2.4.12-0ubuntu3 amd64        Common UNIX Printing System(tm) - PPD/driver support, web interface
  org.openprinting.Backend.CUPS                26764 cups            jean :1.133        user@1000.service -       -
  ```

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: cpdb-backend-cups 2.0b7-0ubuntu2
  ProcVersionSignature: Ubuntu 6.17.0-5.5-generic 6.17.0-rc7
  Uname: Linux 6.17.0-5-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Oct 19 14:52:41 2025
  InstallationDate: Installed on 2025-09-09 (40 days ago)
  InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
  ProcEnviron:
   LANG=fr_FR.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: cpdb-backend-cups
  UpgradeStatus: Upgraded to questing on 2025-10-18 (1 days ago)

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