** Description changed: 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) + + --- + External link: https://warthogs.atlassian.net/browse/UDENG-10098
** Tags added: udeng-10098 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2145134 Title: [Resolute 26.04] GNOME Shell stuttering due to D-Bus conflict (StatusNotifierWatcher) on high-end Intel hardware To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2145134/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
