Application: kwin_x11 (5.17.5)

Qt Version: 5.14.0
Frameworks Version: 5.66.0
Operating System: Linux 5.4.14-arch1-1 x86_64
Distribution: Arch Linux

-- Information about the crash:
Just lock screen for some time, my laptop is asus with intel cpu and navidia, I am using navidia display card, control by optimus-manager-qt-kde.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9db7540880 (LWP 12581))]

Thread 6 (Thread 0x7f9da31a0700 (LWP 13182)):
#0  0x00007f9dbcd88c45 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9dbdbe7cc4 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9dbdbe7da2 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9dbc83b18b in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007f9dbc83b41b in  () at /usr/lib/libQt5Quick.so.5
#5  0x00007f9dbdbe1fd6 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f9dbcd824cf in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f9dbf3d02d3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f9da0d40700 (LWP 12649)):
#0  0x00007f9dbcd88c45 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9dbd6dbf3c in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f9dbd6dbf59 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f9dbcd824cf in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f9dbf3d02d3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f9dad4b9700 (LWP 12635)):
#0  0x00007f9dbf3c5ae6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f9dbde10d43 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9dbde1235d in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9dbddbb41c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9dbdbe0e62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f9dbc4a1479 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f9dbdbe1fd6 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9dbcd824cf in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9dbf3d02d3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f9db59b6700 (LWP 12588)):
#0  0x00007f9dbf3c5ae6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f9dbde10d43 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9dbde1235d in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9dbddbb41c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9dbdbe0e62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f9dbbe20b28 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f9dbdbe1fd6 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9dbcd824cf in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9dbf3d02d3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f9db6631700 (LWP 12586)):
#0  0x00007f9dbf3c59ef in poll () at /usr/lib/libc.so.6
#1  0x00007f9dbdafa630 in  () at /usr/lib/libxcb.so.1
#2  0x00007f9dbdafc2db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f9db693ba01 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f9dbdbe1fd6 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f9dbcd824cf in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f9dbf3d02d3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f9db7540880 (LWP 12581)):
[KCrash Handler]
#6  0x00007f9dbd8b65e9 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#7  0x00007f9dbd8b66a7 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#8  0x00007f9dbd8b85b2 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#9  0x00007f9dbd8b8efb in  () at /usr/lib/libkwin4_effect_builtins.so.1
#10 0x00007f9dbf0c4374 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#11 0x00007f9dbd81ced9 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#12 0x00007f9dbf0c4374 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#13 0x00007f9dbcb9c28c in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.12
#14 0x00007f9dbf0c4374 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#15 0x00007f9dbf15c57c in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#16 0x00007f9dbf0c4202 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#17 0x00007f9dbcb9c11c in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.12
#18 0x00007f9dbf0c41a4 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#19 0x00007f9dbcb9c11c in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.12
#20 0x00007f9dbf0c41a4 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#21 0x00007f9dbcb9481b in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.12
#22 0x00007f9dbf0c41a4 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#23 0x00007f9dbf162ea7 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /usr/lib/libkwin.so.5
#24 0x00007f9dbf15f791 in KWin::Scene::paintSimpleScreen(int, QRegion) () at /usr/lib/libkwin.so.5
#25 0x00007f9dad55f815 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#26 0x00007f9dbf162441 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#27 0x00007f9dbf0c3f64 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#28 0x00007f9dbcb9c070 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.12
#29 0x00007f9dbf0c3f0e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#30 0x00007f9dbcb9c070 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.12
#31 0x00007f9dbf0c3f0e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#32 0x00007f9dbcb9c070 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.12
#33 0x00007f9dbf0c3f0e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#34 0x00007f9dbf1620dc in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib/libkwin.so.5
#35 0x00007f9dad56824f in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#36 0x00007f9dbf0897d5 in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#37 0x00007f9dbddea0d5 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#38 0x00007f9dbe855472 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#39 0x00007f9dbe85ec89 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#40 0x00007f9dbddbc8b2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#41 0x00007f9dbde140dd in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#42 0x00007f9dbde124b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#43 0x00007f9db693cddf in  () at /usr/lib/libQt5XcbQpa.so.5
#44 0x00007f9dbddbb41c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#45 0x00007f9dbddc3426 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#46 0x00007f9dbf4a1113 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#47 0x00007f9dbf2f8153 in __libc_start_main () at /usr/lib/libc.so.6
#48 0x0000563994c2905e in _start ()
[Inferior 1 (process 12581) detached]

Possible duplicates by query: bug 416730, bug 416725, bug 416673, bug 416549, bug 416498.

Reported using DrKonqi