SUMMARY sddm-greeter complains about Breeze Login theme. Here is output from journal: sddm-greeter[2075]: Loading file:///usr/share/sddm/themes/breeze/Main.qml... sddm-greeter[2075]: QObject: Cannot create children for a parent that is in a different thread. (Parent is QGuiApplication(0x7ffec7657f50), parent's thread is QThread(0x1451d10), current thread is QThread(0x14b3060) sddm-greeter[2075]: QObject: Cannot create children for a parent that is in a different thread. (Parent is QGuiApplication(0x7ffec7657f50), parent's thread is QThread(0x1451d10), current thread is QThread(0x14b3060) sddm-greeter[2075]: QObject: Cannot create children for a parent that is in a different thread. (Parent is QGuiApplication(0x7ffec7657f50), parent's thread is QThread(0x1451d10), current thread is QThread(0x14b3060) sddm-greeter[2075]: QObject::installEventFilter(): Cannot filter events for objects in a different thread. sddm-greeter[2075]: Error: could not load plugin for platform "" error: "La bibliothèque partagée est introuvable." QObject(0x0) sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Main.qml:495:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<argument> sddm-greeter[2075]: <input>:406:376: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:407:126: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:408:126: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:408:385: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:409:125: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:410:124: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:411:125: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:411:371: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: <input>:411:619: Could not add child element to parent element because the types are incorrect. sddm-greeter[2075]: file:///usr/lib64/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:209:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax i> sddm-greeter[2075]: file:///usr/lib64/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:209:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax i> sddm-greeter[2075]: file:///usr/lib64/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:209:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax i> sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/VirtualKeyboard.qml:20:1: module "QtQuick.VirtualKeyboard" is not installed sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Login.qml:103:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<argume> sddm-greeter[2075]: file:///usr/lib64/qt5/qml/org/kde/plasma/components/Button.qml:52: ReferenceError: PlasmaCore is not defined sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Main.qml:192: TypeError: Cannot read property 'Locked' of undefined sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Main.qml:463: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/lib64/qt5/qml/org/kde/plasma/workspace/components/BatteryIcon.qml:42: TypeError: Cannot call method 'roundToIconSize' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/Battery.qml:27: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Main.qml:441: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Main.qml:446: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Main.qml:157: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Login.qml:120: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Login.qml:115: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:84: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:114: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:100: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:101: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:91: TypeError: Cannot read property 'gridUnit' of null kernel: traps: sddm-greeter[2075] general protection fault ip:7fd5d704e137 sp:7ffec7655cc0 error:0 in libQt5Qml.so.5.15.0[7fd5d6e2e000+2b6000] sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Login.qml:120: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/Login.qml:115: TypeError: Cannot read property 'smallSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:84: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:114: TypeError: Cannot read property 'largeSpacing' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:100: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:101: TypeError: Cannot read property 'gridUnit' of null sddm-greeter[2075]: file:///usr/share/sddm/themes/breeze/components/SessionManagementScreen.qml:91: TypeError: Cannot read property 'gridUnit' of null OBSERVED RESULT Login is fine, no lag on my system. Therefore, such logging errors in journal are cumbersome and come from default Breeze theme shipped by Breeze package. Upstream issue? EXPECTED RESULT Login fine. No errors in journal related to Breeze files. SOFTWARE/OS VERSIONS Operating System: Mageia 8 KDE Plasma Version: 5.19.4 KDE Frameworks Version: 5.73.0 Qt Version: 5.15.0 Kernel Version: 5.8.1-desktop-2.mga8 OS Type: 64-bit Processors: 4 × Intel® Core™ i5-6600K CPU @ 3.50GHz Memory: 15.6 Gio of RAM Graphics Processor: GeForce GTX 1660 Ti/PCIe/SSE2 On Mageia-side, sddm is at version 0.18.1 (Latest upstream version) Breeze theme is 5.73 And Breeze SDDM theme comes from our plasma-workspace-5.19.4-2.mga8 package.
Will be fixed by https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/209
Git commit bcaf3886d92da5b5cc6f2ab6a6b43dbc096d7c60 by Nate Graham. Committed on 20/08/2020 at 16:24. Pushed by ngraham into branch 'master'. Fix all errors and warnings on login, lock, and logout screens There were three principal sources of errors and warnings: 1. Un-ported `onFooChanged` statements 2. `config.fontSize` being unconditionally referenced from components without access to it (it comes from the SDDM config) 3. Accessing units from the context property rather than the singleton All are fixed now. Tested with: 1. `sddm-greeter --test-mode --theme ~/kde/usr/share/sddm/themes/breeze/` 2. `~/kde/usr/lib64/libexec/kscreenlocker_greet --testing --theme ~/kde/src/plasma-workspace/lookandfeel` 3. `/kde/usr/lib64/libexec/ksmserver-logout-greeter --fakearg` No regressions found. FIXED-IN: 5.20 M +1 -1 components/workspace/BatteryIcon.qml M +2 -2 lookandfeel/contents/components/ActionButton.qml M +6 -2 lookandfeel/contents/components/Battery.qml M +0 -4 lookandfeel/contents/components/KeyboardLayoutButton.qml M +3 -2 lookandfeel/contents/components/SessionManagementScreen.qml M +2 -3 lookandfeel/contents/components/UserDelegate.qml M +3 -0 lookandfeel/contents/components/UserList.qml M +1 -1 lookandfeel/contents/lockscreen/LockScreen.qml M +5 -5 lookandfeel/contents/lockscreen/LockScreenUi.qml M +1 -1 lookandfeel/contents/lockscreen/MainBlock.qml M +0 -1 lookandfeel/contents/logout/Logout.qml M +0 -1 sddm-theme/KeyboardButton.qml M +1 -1 sddm-theme/Login.qml M +20 -2 sddm-theme/Main.qml M +0 -2 sddm-theme/SessionButton.qml https://invent.kde.org/plasma/plasma-workspace/commit/bcaf3886d92da5b5cc6f2ab6a6b43dbc096d7c60