SUMMARY looks like systemd is trying to start portal service too early. i dont know if this makes any sense sense in systemd terms, but looks like it fails to start service in system-space and proceeds correctly start and succeed the service in user-space. error trace in logs read as follows; systemd[1]: Starting Daemon for power management... systemd[1]: Started Daemon for power management. systemd[1058]: Starting Portal service... systemd[1058]: Starting flatpak document portal service... systemd[1058]: Starting sandboxed app permission store... systemd[1058]: Started sandboxed app permission store. systemd[1058]: Started flatpak document portal service. xdg-desktop-por[1218]: Choosing gtk.portal for org.freedesktop.impl.portal.Lockdown as a last-resort fallback xdg-desktop-por[1218]: The preferred method to match portal implementations to desktop environments is to use the portals.conf( systemd[1058]: Starting Portal service (GTK/GNOME implementation)... xdg-desktop-por[1239]: cannot open display: systemd[1058]: xdg-desktop-portal-gtk.service: Main process exited, code=exited, status=1/FAILURE systemd[1058]: xdg-desktop-portal-gtk.service: Failed with result 'exit-code'. systemd[1058]: Failed to start Portal service (GTK/GNOME implementation). systemd[1]: Starting RealtimeKit Scheduling Policy Service... systemd[1]: Started RealtimeKit Scheduling Policy Service. rtkit-daemon[1244]: Successfully called chroot. rtkit-daemon[1244]: Successfully dropped privileges. rtkit-daemon[1244]: Successfully limited resources. rtkit-daemon[1244]: Running. rtkit-daemon[1244]: Watchdog thread running. rtkit-daemon[1244]: Canary thread running. rtkit-daemon[1244]: Supervising 0 threads of 0 processes of 0 users. rtkit-daemon[1244]: Supervising 0 threads of 0 processes of 0 users. rtkit-daemon[1244]: Supervising 0 threads of 0 processes of 0 users. systemd[1058]: Starting Xdg Desktop Portal For KDE... xdg-desktop-portal-kde[1249]: This application failed to start because no Qt platform plugin could be initialized. Available platform plugins are: vkkhrdisplay, wayland-egl, offscreen, wayland, eglfs, minimal, vn│ systemd[1]: Created slice Slice /system/systemd-coredump. systemd[1]: Started Process Core Dump (PID 1254/UID 0). systemd-coredump[1256]: Process 1249 (xdg-desktop-por) of user 968 dumped core. Stack trace of thread 1249: │ │ #0 0x00007fa77cc1e32c n/a (libc.so.6 + 0x9132c) │ │ #1 0x00007fa77cbcd6c8 raise (libc.so.6 + 0x406c8) │ │ #2 0x00007fa77cbb54b8 abort (libc.so.6 + 0x284b8) │ │ #3 0x00007fa77d078924 n/a (libQt6Core.so.6 + 0x8a924) │ │ #4 0x00007fa77d079135 _ZNK14QMessageLogger5fatalEPKcz (libQt6Core.so.6 + 0x8b135) │ │ #5 0x00007fa77d69dbe9 n/a (libQt6Gui.so.6 + 0xd9be9) │ │ #6 0x00007fa77d738a18 _ZN22QGuiApplicationPrivate21createEventDispatcherEv (libQt6Gui.so.6 + 0x174a18) │ │ #7 0x00007fa77d12bb15 _ZN23QCoreApplicationPrivate4initEv (libQt6Core.so.6 + 0x13db15) │ │ #8 0x00007fa77d738ac1 _ZN22QGuiApplicationPrivate4initEv (libQt6Gui.so.6 + 0x174ac1) │ │ #9 0x00007fa77ded83ee _ZN19QApplicationPrivate4initEv (libQt6Widgets.so.6 + 0xf53ee) │ │ #10 0x0000559faa6238e6 n/a (xdg-desktop-portal-kde + 0x258e6) │ │ #11 0x00007fa77cbb6cd0 n/a (libc.so.6 + 0x29cd0) │ │ #12 0x00007fa77cbb6d8a __libc_start_main (libc.so.6 + 0x29d8a) │ │ #13 0x0000559faa623e65 n/a (xdg-desktop-portal-kde + 0x25e65) │ │ │ │ Stack trace of thread 1253: │ │ #0 0x00007fa77cc8c0bf __poll (libc.so.6 + 0xff0bf) │ │ #1 0x00007fa77be7a2f6 n/a (libglib-2.0.so.0 + 0xb82f6) │ │ #2 0x00007fa77be1a162 g_main_context_iteration (libglib-2.0.so.0 + 0x58162) │ │ #3 0x00007fa77d3619c4 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0│ │ #4 0x00007fa77d131d6e _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x143d6e) │ │ #5 0x00007fa77d20f06f _ZN7QThread4execEv (libQt6Core.so.6 + 0x22106f) │ │ #6 0x00007fa77e5a39df n/a (libQt6DBus.so.6 + 0x299df) │ │ #7 0x00007fa77d28ebd3 n/a (libQt6Core.so.6 + 0x2a0bd3) │ │ #8 0x00007fa77cc1c55a n/a (libc.so.6 + 0x8f55a) │ │ #9 0x00007fa77cc99a3c n/a (libc.so.6 + 0x10ca3c) │ │ ELF object binary architecture: AMD x86-64 │ systemd[1]: systemd-coredump@0-1254-0.service: Deactivated successfully. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Main process exited, code=dumped, status=6/ABRT │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Failed with result 'core-dump'. │ systemd[1058]: Failed to start Xdg Desktop Portal For KDE. │ systemd[1058]: Starting Portal service (GTK/GNOME implementation)... │ xdg-desktop-por[1260]: cannot open display: │ systemd[1058]: xdg-desktop-portal-gtk.service: Main process exited, code=exited, status=1/FAILURE │ systemd[1058]: xdg-desktop-portal-gtk.service: Failed with result 'exit-code'. │ systemd[1058]: Failed to start Portal service (GTK/GNOME implementation). │ systemd[1058]: Starting Xdg Desktop Portal For KDE... │ xdg-desktop-portal-kde[1266]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix│ │ Available platform plugins are: vkkhrdisplay, wayland-egl, offscreen, wayland, eglfs, minimal, vnc, linuxfb, minimalegl, │ systemd[1]: Started Process Core Dump (PID 1268/UID 0). │ ystemd-coredump[1270]: Process 1266 (xdg-desktop-por) of user 968 dumped core. │ │ Stack trace of thread 1266: │ #0 0x00007f32c63ec32c n/a (libc.so.6 + 0x9132c) │ #1 0x00007f32c639b6c8 raise (libc.so.6 + 0x406c8) │ #2 0x00007f32c63834b8 abort (libc.so.6 + 0x284b8) │ #3 0x00007f32c6846924 n/a (libQt6Core.so.6 + 0x8a924) │ #4 0x00007f32c6847135 _ZNK14QMessageLogger5fatalEPKcz (libQt6Core.so.6 + 0x8b135) │ #5 0x00007f32c6e6bbe9 n/a (libQt6Gui.so.6 + 0xd9be9) │ #6 0x00007f32c6f06a18 _ZN22QGuiApplicationPrivate21createEventDispatcherEv (libQt6Gui.so.6 + 0x174a18) │ #7 0x00007f32c68f9b15 _ZN23QCoreApplicationPrivate4initEv (libQt6Core.so.6 + 0x13db15) │ #8 0x00007f32c6f06ac1 _ZN22QGuiApplicationPrivate4initEv (libQt6Gui.so.6 + 0x174ac1) │ #9 0x00007f32c76a63ee _ZN19QApplicationPrivate4initEv (libQt6Widgets.so.6 + 0xf53ee) │ #10 0x0000557b20d068e6 n/a (xdg-desktop-portal-kde + 0x258e6) │ #11 0x00007f32c6384cd0 n/a (libc.so.6 + 0x29cd0) │ #12 0x00007f32c6384d8a __libc_start_main (libc.so.6 + 0x29d8a) │ #13 0x0000557b20d06e65 n/a (xdg-desktop-portal-kde + 0x25e65) │ │ Stack trace of thread 1267: │ #0 0x00007f32c645a0bf __poll (libc.so.6 + 0xff0bf) │ #1 0x00007f32c56482f6 n/a (libglib-2.0.so.0 + 0xb82f6) │ #2 0x00007f32c55e8162 g_main_context_iteration (libglib-2.0.so.0 + 0x58162) │ #3 0x00007f32c6b2f9c4 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0│ #4 0x00007f32c68ffd6e _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x143d6e) │ #5 0x00007f32c69dd06f _ZN7QThread4execEv (libQt6Core.so.6 + 0x22106f) │ #6 0x00007f32c7d719df n/a (libQt6DBus.so.6 + 0x299df) │ #7 0x00007f32c6a5cbd3 n/a (libQt6Core.so.6 + 0x2a0bd3) │ #8 0x00007f32c63ea55a n/a (libc.so.6 + 0x8f55a) │ #9 0x00007f32c6467a3c n/a (libc.so.6 + 0x10ca3c) │ ELF object binary architecture: AMD x86-64 │ systemd[1]: systemd-coredump@1-1268-0.service: Deactivated successfully. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Main process exited, code=dumped, status=6/ABRT │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Failed with result 'core-dump'. │ systemd[1058]: Failed to start Xdg Desktop Portal For KDE. ystemd[1]: systemd-coredump@4-1313-0.service: Deactivated successfully. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Main process exited, code=dumped, status=6/ABRT │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Failed with result 'core-dump'. │ systemd[1058]: Failed to start Xdg Desktop Portal For KDE. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Start request repeated too quickly. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Failed with result 'core-dump'. │ systemd[1058]: Failed to start Xdg Desktop Portal For KDE. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Start request repeated too quickly. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Failed with result 'core-dump'. │ systemd[1058]: Failed to start Xdg Desktop Portal For KDE. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Start request repeated too quickly. │ systemd[1058]: plasma-xdg-desktop-portal-kde.service: Failed with result 'core-dump'. │ systemd[1058]: Failed to start Xdg Desktop Portal For KDE. However systemd does start the service successfully in the user-space as follows; systemd[1361]: Created slice User Background Tasks Slice. │ systemd[1361]: Reached target Session services which should run early before the graphical session is brought up. │ systemd[1361]: Starting KDE Config Module Initialization... │ systemd[1361]: Starting KDE Global Shortcuts Server... │ systemd[1361]: Starting Baloo File Indexer Daemon... │ systemd[1361]: kde-baloo.service: Skipped due to 'exec-condition'. │ systemd[1361]: Condition check resulted in Baloo File Indexer Daemon being skipped. │ systemd[1361]: Starting Portal service... │ systemd[1361]: Starting flatpak document portal service... │ systemd[1361]: Started KDE Global Shortcuts Server. │ systemd[1361]: Starting sandboxed app permission store... │ systemd[1361]: Started sandboxed app permission store. │ systemd[1361]: Started flatpak document portal service. │ xdg-desktop-por[1450]: Choosing gtk.portal for org.freedesktop.impl.portal.Lockdown as a last-resort fallback │ xdg-desktop-por[1450]: The preferred method to match portal implementations to desktop environments is to use the portals.conf(│ systemd[1361]: Starting Portal service (GTK/GNOME implementation)... │ systemd[1361]: Starting Virtual filesystem service... │ systemd[1361]: Started KDE Config Module Initialization. ┤ systemd[1361]: Starting KDE Session Management Server... ┤ systemd[1361]: Started Unlock kwallet from pam credentials. ┤ systemd[1361]: Starting KDE Daemon 6... ┤ systemd[1361]: Starting KDE Window Manager... ┤ systemd[1361]: Started Virtual filesystem service. ┤ systemd[1361]: Started Portal service (GTK/GNOME implementation). │ rtkit-daemon[1244]: Supervising 4 threads of 2 processes of 1 users. │ rtkit-daemon[1244]: Supervising 4 threads of 2 processes of 1 users. │ rtkit-daemon[1244]: Supervising 4 threads of 2 processes of 1 users. │ systemd[1361]: Started KDE Daemon 6. │ systemd[1361]: Starting KDE Configuration Module Initialization (Phase 1)... │ systemd[1361]: Starting User preferences database... │ systemd[1361]: Started User preferences database. │ systemd[1361]: Finished KDE Configuration Module Initialization (Phase 1). │ systemd[1361]: Started KDE Session Management Server. │ systemd[1361]: Starting KDE Plasma Workspace... │ NetworkManager[866]: <info> [1709817023.6739] device (E8:5A:8B:EB:B4:6A): state change: disconnected -> unmanaged (reason 'rem│ systemd[1361]: Started KDE Window Manager. │ systemd[1361]: Starting KActivityManager Activity manager Service... │ systemd[1361]: Started KDE Plasma Workspace. ┤ systemd[1361]: Reached target KDE Plasma Workspace Core. ┤ systemd[1361]: Started Proxies GTK DBus menus to a Plasma readable format. ┤ systemd[1361]: Starting KDE PolicyKit Authentication Agent... ┤ systemd[1361]: Starting Powerdevil... ┤ systemd[1361]: Starting Xdg Desktop Portal For KDE... ┤ systemd[1361]: Started Xdg Desktop Portal For KDE. │ systemd[1361]: Started PipeWire Multimedia Service. │ systemd[1361]: Started Multimedia Service Session Manager. │ kded6[1634]: xsettingsd: Loaded 14 settings from /home/koshika/.config/xsettingsd/xsettingsd.conf │ kded6[1634]: xsettingsd: Created window 0x2c00001 on screen 0 with timestamp 24137 │ kded6[1634]: xsettingsd: Selection _XSETTINGS_S0 is owned by 0x0 │ kded6[1634]: xsettingsd: Took ownership of selection _XSETTINGS_S0 │ rtkit-daemon[1244]: Supervising 4 threads of 2 processes of 1 users. │ rtkit-daemon[1244]: Supervising 4 threads of 2 processes of 1 users. │ rtkit-daemon[1244]: Supervising 4 threads of 2 processes of 1 users. │ systemd[1361]: Starting KScreen... │ systemd[1361]: Started Portal service. │ SOFTWARE/OS VERSIONS Linux/KDE Plasma: System: Kernel: 5.15.150-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.2.1 clocksource: tsc avail: hpet,acpi_pm Desktop: KDE Plasma v: 6.0.1 tk: Qt v: N/A info: frameworks v: 6.0.0 wm: kwin_x11 vt: 2 dm: SDDM Distro: Manjaro base: Arch Linux KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0 Qt Version: 6.6.2
On my system sddm-greeter is the culprit Mär 06 08:34:05 david-desktop dbus-daemon[1178]: [session uid=116 pid=1178] Activating via systemd: service name='org.freedesktop.portal.Desktop' unit='xdg-desktop-portal.service' requested by ':1.1'(uid=116 pid=1109 comm="/usr/bin/sddm-greeter-qt6 --socket /tmp/sddm-:0-NX" label="unconfined")
A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kirigami/-/merge_requests/1484
Git commit c0450a2c12a9f27adfc8abeb1716e9a3173705a0 by David Redondo. Committed on 11/03/2024 at 08:59. Pushed by davidre into branch 'master'. Respect QT_NO_XDG_DESKTOP_PORTAL Applications set this when they want to avoid triggering a start of the portal. M +2 -0 src/platform/tabletmodewatcher.cpp https://invent.kde.org/frameworks/kirigami/-/commit/c0450a2c12a9f27adfc8abeb1716e9a3173705a0
*** Bug 483074 has been marked as a duplicate of this bug. ***