Public bug reported:

Ubuntu Release: 26.04

Print notifications work normally after a fresh boot, but after a period
of uptime, gsd-print-notifications silently hangs or loses its
connection to CUPS.

Expected Behaviour:
When a print job is sent, a desktop notification should appear.

Actual Behaviour:
No desktop notification appears.

Diagnostic Steps Taken:

Monitored session D-Bus for org.freedesktop.Notifications. When the bug
occurs, no D-Bus messages are sent, confirming GNOME Shell is not at
fault.

Checked systemd journal. The service
org.gnome.SettingsDaemon.PrintNotifications.service shows as
active/running, meaning the process has not crashed, but is
deadlocked/hung.

AppArmor was ruled out (logs show standard cups-pdf network
restrictions, not fatal denials).

Workaround:
Restarting the daemon manually restores notifications immediately without 
requiring a system reboot:
killall gsd-print-notifications
/usr/libexec/gsd-print-notifications &

ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: gnome-settings-daemon 50.0-1ubuntu1
ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6
Uname: Linux 7.0.0-27-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Jul 19 23:03:32 2026
InstallationDate: Installed on 2026-05-21 (59 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-settings-daemon
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-settings-daemon (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug resolute wayland-session

-- 
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/2161270

Title:
  gsd-print-notifications silently hangs and stops sending desktop
  notifications

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