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Problem customizing my KDE Plasma

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dombaron
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Problem customizing my KDE Plasma

Thu Sep 29, 2022 4:37 pm
Operating System: Kubuntu 22.04
KDE Plasma Version: 5.24.6

This problem started when I tried to improve the performance of my linux, then I ran some commands in the terminal and when I restarted my computer, the themes I used before disappeared and stayed in the default Ubuntu theme. I watched this video here to improve performance: https://www.youtube.com/watch?v=wA1BIJYZbXI&t=764s

Probably some commands I ran affected my system. I'm wanting to change to the theme I used before, but it doesn't work, it's not applied. My global theme is not applied, the only theme that is applied is the icon theme. :(

I've tried going to programs/updates and changing the server to the main server, but it still didn't work. I don't have a backup to restore to an old date. I appreciate any help.
dombaron
Registered Member
Posts
2
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KDE bug handler reported this backtrace to me:

Code: Select all
Application: Configurações do sistema (systemsettings), signal: Aborted

[KCrash Handler]
#4  __pthread_kill_implementation (no_tid=0, signo=6, threadid=139904057441856) at ./nptl/pthread_kill.c:44
#5  __pthread_kill_internal (signo=6, threadid=139904057441856) at ./nptl/pthread_kill.c:78
#6  __GI___pthread_kill (threadid=139904057441856, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#7  0x00007f3df8772476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007f3df87587f3 in __GI_abort () at ./stdlib/abort.c:79
#9  0x00007f3df8c14ba3 in QMessageLogger::fatal(char const*, ...) const () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f3df785196e in QQmlData::destroyed(QObject*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f3df8e73605 in QObject::~QObject() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f3dd9d95952 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so
#13 0x00007f3df64cafcf in QQmlDelegateModel::~QQmlDelegateModel() () from /lib/x86_64-linux-gnu/libQt5QmlModels.so.5
#14 0x00007f3df64cb19d in QQmlDelegateModel::~QQmlDelegateModel() () from /lib/x86_64-linux-gnu/libQt5QmlModels.so.5
#15 0x00007f3df7d818bd in QQuickItemView::~QQuickItemView() () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f3df7e45bb9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f3df8e68a6e in QObjectPrivate::deleteChildren() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f3df8e73924 in QObject::~QObject() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f3dd9d94cf2 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so
#20 0x00007f3df8e68a6e in QObjectPrivate::deleteChildren() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f3df8e73924 in QObject::~QObject() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f3dd9d94609 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so
#23 0x00007f3df7fe4290 in KDeclarative::QmlObject::~QmlObject() () from /lib/x86_64-linux-gnu/libKF5Declarative.so.5
#24 0x00007f3df7fe4e7d in KDeclarative::QmlObjectSharedEngine::~QmlObjectSharedEngine() () from /lib/x86_64-linux-gnu/libKF5Declarative.so.5
#25 0x00007f3dfa34a9b2 in KQuickAddons::ConfigModule::~ConfigModule() () from /lib/x86_64-linux-gnu/libKF5QuickAddons.so.5
#26 0x00007f3dd837f9b1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#27 0x00007f3df86f6617 in ?? () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#28 0x00007f3df86f663d in ?? () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#29 0x00007f3df86fb728 in KCModuleProxy::deleteClient() () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#30 0x00007f3df86fc0e3 in KCModuleProxy::~KCModuleProxy() () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#31 0x00007f3df86fc2bd in KCModuleProxy::~KCModuleProxy() () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#32 0x00007f3df8e68a6e in QObjectPrivate::deleteChildren() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f3df9a84bc6 in QWidget::~QWidget() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f3df9a84f1d in QWidget::~QWidget() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f3df8e68a6e in QObjectPrivate::deleteChildren() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f3df9a84bc6 in QWidget::~QWidget() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007f3df9beadad in QScrollArea::~QScrollArea() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007f3dfa1c0a88 in KPageWidgetItem::~KPageWidgetItem() () from /lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#39 0x00007f3dfa1c2c49 in ?? () from /lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#40 0x00007f3dfa1c7db1 in KPageWidgetModel::removePage(KPageWidgetItem*) () from /lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#41 0x00007f3dfa43fca5 in ModuleView::closeModules() () from /lib/x86_64-linux-gnu/libsystemsettingsview.so.3
#42 0x00007f3ddb3d2d49 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/systemsettingsview/systemsettings_sidebar_mode.so
#43 0x00007f3ddb3d5434 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/systemsettingsview/systemsettings_sidebar_mode.so
#44 0x00007f3ddb3d6003 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/systemsettingsview/systemsettings_sidebar_mode.so
#45 0x00007f3df78a0c85 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#46 0x00007f3df777c620 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#47 0x00007f3df777e41b in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#48 0x00007f3df779b8a3 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#49 0x00007f3df779e5af in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#50 0x00007f3df773072e in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext const*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#51 0x00007f3df78bb905 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#52 0x00007f3df786cbeb in QQmlBoundSignalExpression::evaluate(void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#53 0x00007f3df786dde8 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#54 0x00007f3df78a0725 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#55 0x00007f3df8e752fc in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x00007f3dd9e69c41 in QQuickAbstractButtonPrivate::handleRelease(QPointF const&) () from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#57 0x00007f3dd9e892a1 in QQuickControl::mouseReleaseEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#58 0x00007f3df7cc2bd8 in QQuickItem::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#59 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#60 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#61 0x00007f3df7ce0f75 in QQuickWindowPrivate::deliverMouseEvent(QQuickPointerMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#62 0x00007f3df7ce265f in QQuickWindowPrivate::deliverPointerEvent(QQuickPointerEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#63 0x00007f3df93495a5 in QWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#64 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#65 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#66 0x00007f3df69cb0ab in QQuickWidget::mouseReleaseEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#67 0x00007f3df9a894ee in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#68 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#69 0x00007f3df9a4e364 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#70 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#71 0x00007f3df9a4ce47 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#72 0x00007f3df9aa2d40 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#73 0x00007f3df9aa5fd5 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#74 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#75 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#76 0x00007f3df933d307 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#77 0x00007f3df933ce98 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#78 0x00007f3df9312a2c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#79 0x00007f3df33b8d6e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#80 0x00007f3df6a28d1b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#81 0x00007f3df6a7d6f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#82 0x00007f3df6a263c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#83 0x00007f3df8e97112 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#84 0x00007f3dd828b6e1 in runRdb(unsigned int) () from /lib/x86_64-linux-gnu/libkrdb.so
#85 0x00007f3dd838cf34 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#86 0x00007f3dd838876c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#87 0x00007f3dd838b5b9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#88 0x00007f3dd83824eb in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#89 0x00007f3dd837dd73 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#90 0x00007f3df78a0c85 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#91 0x00007f3df777b17e in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#92 0x00007f3df777e41b in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#93 0x00007f3df779b8a3 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#94 0x00007f3df779e5af in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#95 0x00007f3df773072e in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext const*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#96 0x00007f3df78bb905 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#97 0x00007f3df786cbeb in QQmlBoundSignalExpression::evaluate(void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#98 0x00007f3df786dde8 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#99 0x00007f3df78a0725 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#100 0x00007f3df8e752fc in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#101 0x00007f3dd9e6a19e in QQuickAbstractButton::mouseDoubleClickEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#102 0x00007f3df7cc2bd8 in QQuickItem::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#103 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#104 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#105 0x00007f3df7ce0f75 in QQuickWindowPrivate::deliverMouseEvent(QQuickPointerMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#106 0x00007f3df7ce265f in QQuickWindowPrivate::deliverPointerEvent(QQuickPointerEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#107 0x00007f3df93495a5 in QWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#108 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#109 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#110 0x00007f3df69cadee in QQuickWidget::mouseDoubleClickEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#111 0x00007f3df9a89e79 in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#112 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#113 0x00007f3df9a4e364 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#114 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#115 0x00007f3df9a4ce47 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#116 0x00007f3df9aa2d40 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#117 0x00007f3df9aa5fd5 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#118 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#119 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#120 0x00007f3df933d4b0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#121 0x00007f3df9312a2c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#122 0x00007f3df33b8d6e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#123 0x00007f3df6a28d1b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#124 0x00007f3df6a7d6f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#125 0x00007f3df6a263c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#126 0x00007f3df8e97112 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#127 0x00007f3dd828b6e1 in runRdb(unsigned int) () from /lib/x86_64-linux-gnu/libkrdb.so
#128 0x00007f3dd838cf34 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#129 0x00007f3dd838876c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#130 0x00007f3dd838b5b9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#131 0x00007f3dd83824eb in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#132 0x00007f3dd837dd73 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#133 0x00007f3df78a0c85 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#134 0x00007f3df777b17e in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#135 0x00007f3df777e41b in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#136 0x00007f3df779b8a3 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#137 0x00007f3df779e5af in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#138 0x00007f3df773072e in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext const*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#139 0x00007f3df78bb905 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#140 0x00007f3df786cbeb in QQmlBoundSignalExpression::evaluate(void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#141 0x00007f3df786dde8 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#142 0x00007f3df78a0725 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#143 0x00007f3df8e752fc in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#144 0x00007f3dd9e6a19e in QQuickAbstractButton::mouseDoubleClickEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#145 0x00007f3df7cc2bd8 in QQuickItem::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#146 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#147 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#148 0x00007f3df7ce0f75 in QQuickWindowPrivate::deliverMouseEvent(QQuickPointerMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#149 0x00007f3df7ce265f in QQuickWindowPrivate::deliverPointerEvent(QQuickPointerEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#150 0x00007f3df93495a5 in QWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#151 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#152 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#153 0x00007f3df69cadee in QQuickWidget::mouseDoubleClickEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#154 0x00007f3df9a89e79 in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#155 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#156 0x00007f3df9a4e364 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#157 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#158 0x00007f3df9a4ce47 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#159 0x00007f3df9aa2d40 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#160 0x00007f3df9aa5fd5 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#161 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#162 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#163 0x00007f3df933d4b0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#164 0x00007f3df9312a2c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#165 0x00007f3df33b8d6e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#166 0x00007f3df6a28d1b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#167 0x00007f3df6a7d6f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#168 0x00007f3df6a263c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#169 0x00007f3df8e97112 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#170 0x00007f3dd828b6e1 in runRdb(unsigned int) () from /lib/x86_64-linux-gnu/libkrdb.so
#171 0x00007f3dd838cf34 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#172 0x00007f3dd838876c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#173 0x00007f3dd838b5b9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#174 0x00007f3dd83824eb in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#175 0x00007f3dd837dd73 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#176 0x00007f3df78a0c85 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#177 0x00007f3df777b17e in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#178 0x00007f3df777e41b in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#179 0x00007f3df779b8a3 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#180 0x00007f3df779e5af in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#181 0x00007f3df773072e in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext const*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#182 0x00007f3df78bb905 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#183 0x00007f3df786cbeb in QQmlBoundSignalExpression::evaluate(void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#184 0x00007f3df786dde8 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#185 0x00007f3df78a0725 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#186 0x00007f3df8e752fc in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#187 0x00007f3dd9e6a19e in QQuickAbstractButton::mouseDoubleClickEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#188 0x00007f3df7cc2bd8 in QQuickItem::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#189 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#190 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#191 0x00007f3df7ce0f75 in QQuickWindowPrivate::deliverMouseEvent(QQuickPointerMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#192 0x00007f3df7ce265f in QQuickWindowPrivate::deliverPointerEvent(QQuickPointerEvent*) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#193 0x00007f3df93495a5 in QWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#194 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#195 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#196 0x00007f3df69cadee in QQuickWidget::mouseDoubleClickEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#197 0x00007f3df9a89e79 in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#198 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#199 0x00007f3df9a4e364 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#200 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#201 0x00007f3df9a4ce47 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#202 0x00007f3df9aa2d40 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#203 0x00007f3df9aa5fd5 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#204 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#205 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#206 0x00007f3df933d4b0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#207 0x00007f3df9312a2c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#208 0x00007f3df33b8d6e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#209 0x00007f3df6a28d1b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#210 0x00007f3df6a7d6f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#211 0x00007f3df6a263c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#212 0x00007f3df8e97112 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#213 0x00007f3dd828b6e1 in runRdb(unsigned int) () from /lib/x86_64-linux-gnu/libkrdb.so
#214 0x00007f3dd8382500 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/kcms/systemsettings/kcm_lookandfeel.so
#215 0x00007f3df86f76b6 in ?? () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#216 0x00007f3df86ff387 in KCModuleProxy::save() () from /lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#217 0x00007f3dfa43fde5 in ModuleView::moduleSave(KCModuleProxy*) () from /lib/x86_64-linux-gnu/libsystemsettingsview.so.3
#218 0x00007f3dfa4446f6 in ?? () from /lib/x86_64-linux-gnu/libsystemsettingsview.so.3
#219 0x00007f3df8e757c8 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#220 0x00007f3df9b3c116 in QAbstractButton::clicked(bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#221 0x00007f3df9b3c39e in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#222 0x00007f3df9b3dfc4 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#223 0x00007f3df9b3e1e7 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#224 0x00007f3df9a894ee in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#225 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#226 0x00007f3df9a4e364 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#227 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#228 0x00007f3df9a4ce47 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#229 0x00007f3df9aa2d40 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#230 0x00007f3df9aa5fd5 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#231 0x00007f3df9a46713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#232 0x00007f3df8e3de3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#233 0x00007f3df933d307 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#234 0x00007f3df9312a2c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#235 0x00007f3df33b8d6e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#236 0x00007f3df6a28d1b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#237 0x00007f3df6a7d6f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#238 0x00007f3df6a263c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#239 0x00007f3df8e970b8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#240 0x00007f3df8e3c75b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#241 0x00007f3df8e44cf4 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#242 0x0000561944e351bf in ?? ()
#243 0x00007f3df8759d90 in __libc_start_call_main (main=main@entry=0x561944e346b0, argc=argc@entry=1, argv=argv@entry=0x7ffe508eccd8) at ../sysdeps/nptl/libc_start_call_main.h:58
#244 0x00007f3df8759e40 in __libc_start_main_impl (main=0x561944e346b0, argc=1, argv=0x7ffe508eccd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe508eccc8) at ../csu/libc-start.c:392
#245 0x0000561944e35af5 in ?? ()
[Inferior 1 (process 26399) detached]


Also, according to the KDE bug handler, there are some packages needed to install. I don't know if this can help at all:
https://imgur.com/a/Z8NNAkr


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