I used both xorg and wayland. After using wayland some time when I switched to xorg kde system apps started to crash after click to open. I can use other apps but even system settings app doesn’t work here are the crash reports.
Application: Dolphin (dolphin), signal: Segmentation fault
[KCrash Handler]
#4 0x00007fc674f8dd90 in QWidget::hide() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5 0x00007fc6750f3625 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#6 0x00007fc6750f8149 in QMenuBar::changeEvent(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7 0x00007fc674fa4d8f in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8 0x00007fc674f62fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9 0x00007fc6742b16f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc674f96342 in QWidgetPrivate::updateFont(QFont const&) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007fc674fa530e in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007fc674f62fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007fc6742b16f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fc674fbd7f6 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fc674fbd826 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fc674fbd8ee in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fc6742e8f7c in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fc67474069f in QWindow::screenChanged(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fc674740edf in QWindowPrivate::emitScreenChangedRecursion(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007fc674f974c5 in QWidgetPrivate::create() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fc674f9781b in QWidget::create(unsigned long long, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fc6750f5b63 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fc6750f5f35 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fc6750b82fa in QMainWindow::menuBar() const () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fc675d0c591 in KXmlGuiWindow::createGUI(QString const&) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#26 0x00007fc675d0d71b in KXmlGuiWindow::setupGUI(QSize const&, QFlagsKXmlGuiWindow::StandardWindowOption, QString const&) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#27 0x00007fc675d0d87f in KXmlGuiWindow::setupGUI(QFlags< KXmlGuiWindow::StandardWindowOption>, QString const&) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#28 0x00005594efa0faa0 in ?? ()
#29 0x00005594ef9fa09b in ?? ()
#30 0x00007fc673e4618a in __libc_start_call_main (main=main@entry=0x5594ef9f8ed0, argc=argc@entry=1, argv=argv@entry=0x7fff33374108) at …/sysdeps/nptl/libc_start_call_main.h:58
#31 0x00007fc673e46245 in __libc_start_main_impl (main=0x5594ef9f8ed0, argc=1, argv=0x7fff33374108, init=, fini=, rtld_fini=, stack_end=0x7fff333740f8) at …/csu/libc-start.c:381
#32 0x00005594ef9fa591 in ?? ()
[Inferior 1 (process 2710) detached]
Application: Konsole (konsole), signal: Segmentation fault
[KCrash Handler]
#4 0x00007fe95598dd95 in QWidget::hide() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5 0x00007fe955af3625 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#6 0x00007fe955af8149 in QMenuBar::changeEvent(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7 0x00007fe9559a4d8f in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8 0x00007fe955962fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9 0x00007fe954cb16f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fe955996342 in QWidgetPrivate::updateFont(QFont const&) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007fe9559a530e in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007fe955962fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007fe954cb16f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fe9559bd7f6 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fe9559bd826 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fe9559bd8ee in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fe954ce8f7c in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fe95514069f in QWindow::screenChanged(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fe955140edf in QWindowPrivate::emitScreenChangedRecursion(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007fe9559974c5 in QWidgetPrivate::create() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fe95599781b in QWidget::create(unsigned long long, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fe955af5b63 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fe955af5f35 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fe955ab82fa in QMainWindow::menuBar() const () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fe956435d46 in Konsole::MainWindow::setupActions() () from /lib/x86_64-linux-gnu/libkonsoleapp.so.1
#26 0x00007fe956438cd4 in Konsole::MainWindow::MainWindow() () from /lib/x86_64-linux-gnu/libkonsoleapp.so.1
#27 0x00007fe95642cf7c in Konsole::Application::newMainWindow() () from /lib/x86_64-linux-gnu/libkonsoleapp.so.1
#28 0x00007fe95642d4e8 in Konsole::Application::processWindowArgs(bool&) () from /lib/x86_64-linux-gnu/libkonsoleapp.so.1
#29 0x00007fe9564323e2 in Konsole::Application::newInstance() () from /lib/x86_64-linux-gnu/libkonsoleapp.so.1
#30 0x0000560c16051f00 in ?? ()
#31 0x00007fe95484618a in __libc_start_call_main (main=main@entry=0x560c16051690, argc=argc@entry=1, argv=argv@entry=0x7ffd304ac5c8) at …/sysdeps/nptl/libc_start_call_main.h:58
#32 0x00007fe954846245 in __libc_start_main_impl (main=0x560c16051690, argc=1, argv=0x7ffd304ac5c8, init=, fini=, rtld_fini=, stack_end=0x7ffd304ac5b8) at …/csu/libc-start.c:381
#33 0x0000560c16052301 in ?? ()
[Inferior 1 (process 2633) detached]
Application: System Settings (systemsettings), signal: Segmentation fault
[KCrash Handler]
#4 0x00007facbb98dd90 in QWidget::hide() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5 0x00007facbbaf3625 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#6 0x00007facbbaf8149 in QMenuBar::changeEvent(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7 0x00007facbb9a4d8f in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8 0x00007facbb962fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9 0x00007facbacb16f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007facbb996342 in QWidgetPrivate::updateFont(QFont const&) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007facbb9a530e in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007facbb962fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007facbacb16f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007facbb9bd7f6 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007facbb9bd826 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007facbb9bd8ee in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007facbace8f7c in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007facbb14069f in QWindow::screenChanged(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007facbb140edf in QWindowPrivate::emitScreenChangedRecursion(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007facbb9974c5 in QWidgetPrivate::create() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007facbb99781b in QWidget::create(unsigned long long, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007facbbaf5b63 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007facbbaf5f35 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007facbbab82fa in QMainWindow::menuBar() const () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007facbc6a7591 in KXmlGuiWindow::createGUI(QString const&) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#26 0x00007facbc6a871b in KXmlGuiWindow::setupGUI(QSize const&, QFlags< KXmlGuiWindow::StandardWindowOption>, QString const&) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#27 0x00007facbc6a887f in KXmlGuiWindow::setupGUI(QFlags< KXmlGuiWindow::StandardWindowOption>, QString const&) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#28 0x0000557b30cf9b78 in ?? ()
#29 0x0000557b30cfa63e in ?? ()
#30 0x0000557b30cf0d6c in ?? ()
#31 0x00007facba84618a in __libc_start_call_main (main=main@entry=0x557b30cf05a0, argc=argc@entry=1, argv=argv@entry=0x7fffbf04bce8) at …/sysdeps/nptl/libc_start_call_main.h:58
#32 0x00007facba846245 in __libc_start_main_impl (main=0x557b30cf05a0, argc=1, argv=0x7fffbf04bce8, init=, fini=, rtld_fini=, stack_end=0x7fffbf04bcd8) at …/csu/libc-start.c:381
#33 0x0000557b30cf16e1 in ?? ()
[Inferior 1 (process 2818) detached]