SUMMARY STEPS TO REPRODUCE 1. 2. 3. OBSERVED RESULT When I logged in the other day, my desktop panel disappeared and I could not right-click my desktop. I have tried running plasmashell from the terminal, but it results in a segfault. I think it may have to do with CUPS as the past week, I set up a network printer over the web interface. Here is the output of running plasmashell in the terminal: $ plasmashell Icon theme "ubuntu-mono-dark" not found. invalid metadata "/usr/lib/qt/plugins/kfileaudiopreview.so" invalid metadata "/usr/lib/qt/plugins/jpegthumbnail.so" invalid metadata "/usr/lib/qt/plugins/icon_mode.so" invalid metadata "/usr/lib/qt/plugins/krunner_shell.so" invalid metadata "/usr/lib/qt/plugins/fileviewdropboxplugin.so" invalid metadata "/usr/lib/qt/plugins/djvuthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_runcommand_config.so" invalid metadata "/usr/lib/qt/plugins/rawthumbnail.so" invalid metadata "/usr/lib/qt/plugins/gsthumbnail.so" invalid metadata "/usr/lib/qt/plugins/imagethumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_clock.so" invalid metadata "/usr/lib/qt/plugins/powerdevilwirelesspowersavingaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_nic.so" invalid metadata "/usr/lib/qt/plugins/kcm_hotkeys.so" invalid metadata "/usr/lib/qt/plugins/fileviewbazaarplugin.so" invalid metadata "/usr/lib/qt/plugins/opendocumentthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphinviewmodes.so" invalid metadata "/usr/lib/qt/plugins/kio_fonts.so" invalid metadata "/usr/lib/qt/plugins/kritathumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_ssl.so" invalid metadata "/usr/lib/qt/plugins/krunner_plasma-desktop.so" invalid metadata "/usr/lib/qt/plugins/kcm_kscreen.so" invalid metadata "/usr/lib/qt/plugins/kcm_sddm.so" invalid metadata "/usr/lib/qt/plugins/attica_kde.so" invalid metadata "/usr/lib/qt/plugins/krunner_converter.so" invalid metadata "/usr/lib/qt/plugins/kcm_plasmasearch.so" invalid metadata "/usr/lib/qt/plugins/sambausershareplugin.so" invalid metadata "/usr/lib/qt/plugins/kio_msits.so" invalid metadata "/usr/lib/qt/plugins/kcm_desktoppaths.so" invalid metadata "/usr/lib/qt/plugins/krunner_locations.so" invalid metadata "/usr/lib/qt/plugins/kcmspellchecking.so" invalid metadata "/usr/lib/qt/plugins/gvpart.so" invalid metadata "/usr/lib/qt/plugins/krunner_spellcheck.so" invalid metadata "/usr/lib/qt/plugins/kcm_smserver.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwallet5.so" invalid metadata "/usr/lib/qt/plugins/kcm_kdeconnect.so" invalid metadata "/usr/lib/qt/plugins/comicbookthumbnail.so" invalid metadata "/usr/lib/qt/plugins/windowsexethumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_systemd.so" invalid metadata "/usr/lib/qt/plugins/krunner_kill.so" invalid metadata "/usr/lib/qt/plugins/windowsimagethumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_standard_actions.so" invalid metadata "/usr/lib/qt/plugins/kcm_style.so" invalid metadata "/usr/lib/qt/plugins/kcm_keys.so" invalid metadata "/usr/lib/qt/plugins/kcm_opengl.so" invalid metadata "/usr/lib/qt/plugins/fontthumbnail.so" invalid metadata "/usr/lib/qt/plugins/exrthumbnail.so" invalid metadata "/usr/lib/qt/plugins/textthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kwincompositing.so" invalid metadata "/usr/lib/qt/plugins/krunner_datetime.so" invalid metadata "/usr/lib/qt/plugins/kcm_view1394.so" invalid metadata "/usr/lib/qt/plugins/kcm_pci.so" invalid metadata "/usr/lib/qt/plugins/kcm_baloofile.so" invalid metadata "/usr/lib/qt/plugins/powerdevildimdisplayaction_config.so" invalid metadata "/usr/lib/qt/plugins/krunner_webshortcuts.so" invalid metadata "/usr/lib/qt/plugins/libkcm_device_automounter.so" invalid metadata "/usr/lib/qt/plugins/kcm_fontinst.so" invalid metadata "/usr/lib/qt/plugins/krunner_bookmarksrunner.so" invalid metadata "/usr/lib/qt/plugins/kded_touchpad.so" invalid metadata "/usr/lib/qt/plugins/kcm_emoticons.so" invalid metadata "/usr/lib/qt/plugins/kcm_webshortcuts.so" invalid metadata "/usr/lib/qt/plugins/user_manager.so" invalid metadata "/usr/lib/qt/plugins/kcm_autostart.so" invalid metadata "/usr/lib/qt/plugins/kcm_memory.so" invalid metadata "/usr/lib/qt/plugins/kcm_trash.so" invalid metadata "/usr/lib/qt/plugins/powerdevilkeyboardbrightnesscontrolaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_metalinkfactory.so" invalid metadata "/usr/lib/qt/plugins/msm_timedate.so" invalid metadata "/usr/lib/qt/plugins/kfontviewpart.so" invalid metadata "/usr/lib/qt/plugins/kstyle_oxygen_config.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_pausemusic_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_keyboard.so" invalid metadata "/usr/lib/qt/plugins/svgthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kded_printmanager.so" invalid metadata "/usr/lib/qt/plugins/krunner_services.so" invalid metadata "/usr/lib/qt/plugins/appimagethumbnail.so" invalid metadata "/usr/lib/qt/plugins/msm_locale.so" invalid metadata "/usr/lib/qt/plugins/kstyle_breeze_config.so" invalid metadata "/usr/lib/qt/plugins/krunner_konsoleprofiles.so" invalid metadata "/usr/lib/qt/plugins/kcm_powerdevilglobalconfig.so" invalid metadata "/usr/lib/qt/plugins/kcm_networkmanagement.so" invalid metadata "/usr/lib/qt/plugins/powerdevildpmsaction.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphingeneral.so" invalid metadata "/usr/lib/qt/plugins/kio_obexftp.so" invalid metadata "/usr/lib/qt/plugins/kio_bluetooth.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_share_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_spellcheck.so" invalid metadata "/usr/lib/qt/plugins/msm_kernel.so" invalid metadata "/usr/lib/qt/plugins/krunner_recentdocuments.so" invalid metadata "/usr/lib/qt/plugins/kcm_about_distro.so" invalid metadata "/usr/lib/qt/plugins/powerdevildpmsaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_solid_actions.so" invalid metadata "/usr/lib/qt/plugins/krunner_charrunner.so" invalid metadata "/usr/lib/qt/plugins/krunner_windowedwidgets.so" invalid metadata "/usr/lib/qt/plugins/kcm_printer_manager.so" invalid metadata "/usr/lib/qt/plugins/kcm_info.so" invalid metadata "/usr/lib/qt/plugins/kcm_samba.so" invalid metadata "/usr/lib/qt/plugins/kcm_kgamma.so" invalid metadata "/usr/lib/qt/plugins/plasma-geolocation-gps.so" invalid metadata "/usr/lib/qt/plugins/krunner_sessions.so" invalid metadata "/usr/lib/qt/plugins/msm_language_packages.so" invalid metadata "/usr/lib/qt/plugins/kcm_activities.so" invalid metadata "/usr/lib/qt/plugins/kcm_joystick.so" invalid metadata "/usr/lib/qt/plugins/ffmpegthumbs.so" invalid metadata "/usr/lib/qt/plugins/okularpart.so" invalid metadata "/usr/lib/qt/plugins/ebookthumbnail.so" invalid metadata "/usr/lib/qt/plugins/krunner_dictionary.so" invalid metadata "/usr/lib/qt/plugins/kget_browser_integration.so" invalid metadata "/usr/lib/qt/plugins/dolphinpart.so" invalid metadata "/usr/lib/qt/plugins/krunner_powerdevil.so" invalid metadata "/usr/lib/qt/plugins/plasma-geolocation-ip.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_mmsfactory.so" invalid metadata "/usr/lib/qt/plugins/powerdevilhandlebuttoneventsaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwintabbox.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_sendnotifications_config.so" invalid metadata "/usr/lib/qt/plugins/fileviewsvnplugin.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwinoptions.so" invalid metadata "/usr/lib/qt/plugins/libkcm_qtquicksettings.so" invalid metadata "/usr/lib/qt/plugins/krunner_katesessions.so" invalid metadata "/usr/lib/qt/plugins/mltpreview.so" invalid metadata "/usr/lib/qt/plugins/kcm_usb.so" invalid metadata "/usr/lib/qt/plugins/kcm_phonon.so" invalid metadata "/usr/lib/qt/plugins/powerdevilbrightnesscontrolaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_kill.so" invalid metadata "/usr/lib/qt/plugins/blenderthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_charrunner.so" invalid metadata "/usr/lib/qt/plugins/kcm_mouse.so" invalid metadata "/usr/lib/qt/plugins/kcm_kamera.so" invalid metadata "/usr/lib/qt/plugins/kcm_powerdevilprofilesconfig.so" invalid metadata "/usr/lib/qt/plugins/kdeconnectfileitemaction.so" invalid metadata "/usr/lib/qt/plugins/kcm_powerdevilactivitiesconfig.so" invalid metadata "/usr/lib/qt/plugins/kcm_kio.so" invalid metadata "/usr/lib/qt/plugins/libplasmanetworkmanagement_openconnectui.so" invalid metadata "/usr/lib/qt/plugins/kcm_filetypes.so" invalid metadata "/usr/lib/qt/plugins/powerdevilsuspendsessionaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_kded.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_multisegkiofactory.so" invalid metadata "/usr/lib/qt/plugins/kstyle_qtcurve5_config.so" invalid metadata "/usr/lib/qt/plugins/fileviewhgplugin.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwin_scripts.so" invalid metadata "/usr/lib/qt/plugins/miloutextplugin.so" invalid metadata "/usr/lib/qt/plugins/baloofilepropertiesplugin.so" invalid metadata "/usr/lib/qt/plugins/msm_keyboard.so" invalid metadata "/usr/lib/qt/plugins/audiothumbnail.so" invalid metadata "/usr/lib/qt/plugins/fileviewgitplugin.so" invalid metadata "/usr/lib/qt/plugins/krunner_calculatorrunner.so" invalid metadata "/usr/lib/qt/plugins/krunner_windows.so" invalid metadata "/usr/lib/qt/plugins/msm_mhwd.so" invalid metadata "/usr/lib/qt/plugins/krunner_kwin.so" invalid metadata "/usr/lib/qt/plugins/powerdevilrunscriptaction_config.so" invalid metadata "/usr/lib/qt/plugins/krunner_appstream.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwinrules.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_dictionary.so" invalid metadata "/usr/lib/qt/plugins/kcm_componentchooser.so" invalid metadata "/usr/lib/qt/plugins/kcm_access.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwinscreenedges.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphinnavigation.so" invalid metadata "/usr/lib/qt/plugins/classic_mode.so" invalid metadata "/usr/lib/qt/plugins/systemsettings_sidebar_mode.so" invalid metadata "/usr/lib/qt/plugins/krunner_activities.so" invalid metadata "/usr/lib/qt/plugins/msm_users.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_checksumsearchfactory.so" invalid metadata "/usr/lib/qt/plugins/kcm_devinfo.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_mirrorsearchfactory.so" invalid metadata "/usr/lib/qt/plugins/krunner_placesrunner.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwintouchscreen.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_bittorrentfactory.so" invalid metadata "/usr/lib/qt/plugins/kio_kamera.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphinservices.so" org.kde.plasmaquick: Applet preload policy set to 1 file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:302:17: QML QQuickText: Binding loop detected for property "width" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:302:17: QML QQuickText: Binding loop detected for property "width" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:302:17: QML QQuickText: Binding loop detected for property "width" Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) Both point size and pixel size set. Using pixel size. Both point size and pixel size set. Using pixel size. Both point size and pixel size set. Using pixel size. trying to show an empty dialog trying to show an empty dialog libkcups: CUPS-Get-Printers last error: 0 successful-ok libkcups: Create-Printer-Subscriptions last error: 0 successful-ok libkcups: Get-Jobs last error: 0 successful-ok libkcups: Get-Jobs last error: 0 successful-ok Plasma Shell startup completed libkcups: 3 "Brother_MFC-J285DW" libkcups: 5 "Canon_MG5500_series" libkcups: 3 KCrash: Attempting to start /usr/bin/plasmashell from kdeinit sock_file=/run/user/1000/kdeinit5__0 QSocketNotifier: Invalid socket 8 and type 'Read', disabling... QSocketNotifier: Invalid socket 9 and type 'Read', disabling... QSocketNotifier: Invalid socket 51 and type 'Read', disabling... KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = plasmashell path = /usr/bin pid = 4113 KCrash: Arguments: /usr/bin/plasmashell Segmentation fault (core dumped) EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
I have just fixed this issue by going into the cups web interface at http://localhost:631/printers/ and removing the netowork printer I recently added. I then ran `$ plasmashell` and the panel loaded without a segmentation fault. I am still unsure why a network printer would cause a segfault in plasma shell though.
can you reproduce with a backtrace?
That means Plasma crashed. As Marco says, we will need a backtrace of the crash, if you can still reprpoduce this issue with the latest version of Plasma. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!