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Description:
Hardware: Intel Core i9-14900K, 128GB RAM.
Problem: Severe UI lag and micro-stuttering in GNOME Shell 50.
Root Cause:
gnome-shell (PID 10513) exports org.kde.StatusNotifierWatcher on
the session bus (verified via busctl).
ubuntu-appindicators extension is mandatory in /usr/share/gnome-
shell/modes/ubuntu.json and attempts to export the same interface.
Conflict results in Gio.IOErrorEnum: An object is already
exported.
Extension falls back to an expensive "Brute-force mode", causing
infinite log loops: GdkPixbuf.PixbufError: Failed to recognize image
format.
Result: The main JS thread of GNOME Shell is saturated, causing
frame drops even on 32-thread CPUs.
The issue persists even when no major 32-bit applications (Steam/Wine)
are running. Only legacy printer drivers (Brother DCP-1610W) and base
i386 libraries are present
User-level 'disable' command is ignored/overridden by ubuntu.json mode after
Mesa 26.0.2 update
journalctl -f -o cat /usr/bin/gnome-shell
Using Brute-force mode for StatusNotifierItem :1.119@/StatusNotifierItem
Using Brute-force mode for StatusNotifierItem :1.98@/org/blueman/sni
Using Brute-force mode for StatusNotifierItem
:1.95@/org/ayatana/NotificationItem/tray_icon_tray_app
Using Brute-force mode for StatusNotifierItem
:1.50@/org/ayatana/NotificationItem/unattended_upgrade
Using Brute-force mode for StatusNotifierItem
:1.50@/org/ayatana/NotificationItem/software_update_available
Using Brute-force mode for StatusNotifierItem
:1.74@/org/ayatana/NotificationItem/tray_icon_tray_app_10666_1
meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0'
failed
meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0'
failed
Object Gjs_ui_messageTray_Notification (0x590f66718da0), has been already
disposed — impossible to emit any signal on it. This might be caused by the
object having been destroyed from C code using something such as destroy(),
dispose(), or remove() vfuncs.
== Stack trace for context 0x590f63bff520 ==
#0 590f63cf7248 i resource:///org/gnome/shell/ui/messageTray.js:483
(3f95153778d0 @ 74)
#1 590f63cf71a0 i resource:///org/gnome/shell/ui/messageTray.js:479
(3f9515377880 @ 63)
#2 590f63cf7118 i resource:///org/gnome/shell/ui/messageList.js:732
(3f9515385380 @ 33)
#3 590f63cf7088 i resource:///org/gnome/shell/ui/init.js:20 (3b785318d8d0 @
48)
Object Gjs_ui_messageTray_Notification (0x590f66718da0), has been already
disposed — impossible to access it. This might be caused by the object having
been destroyed from C code using something such as destroy(), dispose(), or
remove() vfuncs.
== Stack trace for context 0x590f63bff520 ==
#0 590f63cf7248 i resource:///org/gnome/shell/ui/messageTray.js:489
(3f95153778d0 @ 148)
#1 590f63cf71a0 i resource:///org/gnome/shell/ui/messageTray.js:479
(3f9515377880 @ 63)
#2 590f63cf7118 i resource:///org/gnome/shell/ui/messageList.js:732
(3f9515385380 @ 33)
#3 590f63cf7088 i resource:///org/gnome/shell/ui/init.js:20 (3b785318d8d0 @
48)
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: xorg (not installed)
ProcVersionSignature: Ubuntu 7.0.0-7.7-generic 7.0.0-rc3
Uname: Linux 7.0.0-7-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.33.1-0ubuntu4
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Mar 22 12:34:02 2026
InstallationDate: Installed on 2026-03-13 (9 days ago)
InstallationMedia: Ubuntu 26.04 LTS "Resolute Raccoon" - Daily amd64 (20260313)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug performance resolute wayland-session
--
[Resolute 26.04] GNOME Shell stuttering due to D-Bus conflict
(StatusNotifierWatcher) on high-end Intel hardware
https://bugs.launchpad.net/bugs/2145134
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