Public bug reported:
**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
[email protected] - -
```
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)
** Affects: cpdb-backend-cups (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing wayland-session
** Attachment added: "print-trace.log"
https://bugs.launchpad.net/bugs/2128983/+attachment/5918886/+files/print-trace.log
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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)
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