414555 2019-11-27 01:14:37 +0000 KWin/libQt5Gui.so.5.13.2 crashes when locking screen, listening to music, running virtualbox, etc 2019-11-28 01:38:55 +0000 1 1 4 Plasma kwin general 5.16.5 Compiled Sources Linux RESOLVED FIXED drkonqi NOR crash --- 0 initial.dann kwin-bugs-null 0 oldest_to_newest 1893591 0 initial.dann 2019-11-27 01:14:37 +0000 Application: kwin_x11 (5.16.5) (Compiled from sources) Qt Version: 5.13.2 Frameworks Version: 5.64.0 Operating System: Linux 4.14.138 x86_64 Distribution: "Gentoo Base System release 2.6" -- Information about the crash: - What I was doing when the application crashed: I had a virtualbox virtual machine running, I was listening to music using Strawberry music player off a secondary internal laptop drive and running other applications such as email, terminal, browser, slack and one or two others. This is the second time this has happened. I haven't repeated the exact steps, but I may try that soon in the future. This all started to occur once I upgraded my qt versions and some plasma apps. I use gentoo, qt 5.13.2 packages, kscreen and kscreenlocker 5.16.5. I've locked this machine a couple times previously today without issue, but also without listening to music. Virtualbox was running then. Started machine up from cold boot this morning. - Unusual behavior I noticed: Lock screen appears in the form of the lock screen background, but no password prompt. It holds at the background for a few seconds, then flashes to black, then to background, then to black again. journalctl reports a segfault. I'm concerned that perhaps this bug relates to the media player widget on the lock screen and strawberry, which I compile from git source master branch. I have also updated Strawberry close to when I upgraded qt5 libs. To add, nvidia drivers were also updated recently (390.x series for a 2000M quadro card via emerge). Once lock screen crashes, I lose my background and plasma widgets/panels, black screen background The only way I have been resolving this is to reboot. -- Backtrace: Application: KWin (kwin_x11), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7ff306192880 (LWP 51439))] Thread 4 (Thread 0x7ff2ed603700 (LWP 54841)): #0 0x00007ff30d86611c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007ff30dd6a8ca in () at /usr/lib64/libQt5Script.so.5 #2 0x00007ff30dd6a8e9 in () at /usr/lib64/libQt5Script.so.5 #3 0x00007ff30d85f408 in start_thread () at /lib64/libpthread.so.0 #4 0x00007ff30f96a31f in clone () at /lib64/libc.so.6 Thread 3 (Thread 0x7ff2fd69e700 (LWP 54293)): #0 0x00007ff30f95e386 in ppoll () at /lib64/libc.so.6 #1 0x00007ff30e544d35 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007ff30e545f0e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #3 0x00007ff30e4f5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007ff30e360bf6 in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #5 0x00007ff30d000355 in () at /usr/lib64/libQt5Qml.so.5 #6 0x00007ff30e361e22 in () at /usr/lib64/libQt5Core.so.5 #7 0x00007ff30d85f408 in start_thread () at /lib64/libpthread.so.0 #8 0x00007ff30f96a31f in clone () at /lib64/libc.so.6 Thread 2 (Thread 0x7ff2fffff700 (LWP 51444)): #0 0x00007ff30f95e386 in ppoll () at /lib64/libc.so.6 #1 0x00007ff30e544d35 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007ff30e545f0e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #3 0x00007ff30e4f5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007ff30e360bf6 in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #5 0x00007ff30ca56575 in () at /usr/lib64/libQt5DBus.so.5 #6 0x00007ff30e361e22 in () at /usr/lib64/libQt5Core.so.5 #7 0x00007ff30d85f408 in start_thread () at /lib64/libpthread.so.0 #8 0x00007ff30f96a31f in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7ff306192880 (LWP 51439)): [KCrash Handler] #6 0x00007ff30df7cf2e in () at /usr/lib64/libkwin4_effect_builtins.so.1 #7 0x00007ff30df7cff4 in () at /usr/lib64/libkwin4_effect_builtins.so.1 #8 0x00007ff30df7ee6d in () at /usr/lib64/libkwin4_effect_builtins.so.1 #9 0x00007ff30df7f852 in () at /usr/lib64/libkwin4_effect_builtins.so.1 #10 0x00007ff30f6e8653 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #11 0x00007ff30deecb49 in () at /usr/lib64/libkwin4_effect_builtins.so.1 #12 0x00007ff30f6e8653 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #13 0x00007ff30dfe103c in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwineffects.so.12 #14 0x00007ff30f6e8653 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #15 0x00007ff30f6d54cc in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #16 0x00007ff30f6e84eb in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #17 0x00007ff30df701ba in () at /usr/lib64/libkwin4_effect_builtins.so.1 #18 0x00007ff30f6e8493 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #19 0x00007ff30dfe0ecc in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwineffects.so.12 #20 0x00007ff30f6e8493 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #21 0x00007ff30dfe0ecc in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwineffects.so.12 #22 0x00007ff30f6e8493 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #23 0x00007ff30dfe989b in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwineffects.so.12 #24 0x00007ff30f6e8493 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib64/libkwin.so.5 #25 0x00007ff30f6dc011 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /usr/lib64/libkwin.so.5 #26 0x00007ff30f6d8767 in KWin::Scene::paintSimpleScreen(int, QRegion) () at /usr/lib64/libkwin.so.5 #27 0x00007ff30403ef46 in () at /usr/lib64/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so #28 0x00007ff30f6db560 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwin.so.5 #29 0x00007ff30f6e8245 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwin.so.5 #30 0x00007ff30dfe0e21 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwineffects.so.12 #31 0x00007ff30f6e81ed in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwin.so.5 #32 0x00007ff30dfe0e21 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwineffects.so.12 #33 0x00007ff30f6e81ed in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwin.so.5 #34 0x00007ff30dfe0e21 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwineffects.so.12 #35 0x00007ff30f6e81ed in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwin.so.5 #36 0x00007ff30dfe0e21 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwineffects.so.12 #37 0x00007ff30f6e81ed in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib64/libkwin.so.5 #38 0x00007ff30f6db20e in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib64/libkwin.so.5 #39 0x00007ff3040469cd in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib64/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so #40 0x00007ff30f6ccd0a in KWin::Compositor::performCompositing() () at /usr/lib64/libkwin.so.5 #41 0x00007ff30e52078b in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5 #42 0x00007ff30ee35641 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #43 0x00007ff30ee3cb58 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #44 0x00007ff30e4f70d2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #45 0x00007ff30e547b64 in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5 #46 0x00007ff30e546040 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #47 0x00007ff3053f2cae in () at /usr/lib64/libQt5XcbQpa.so.5 #48 0x00007ff30e4f5e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #49 0x00007ff30e4fddb2 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #50 0x00007ff30fa3cfa8 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so #51 0x00007ff30f887efb in __libc_start_main () at /lib64/libc.so.6 #52 0x00005649e8de509a in _start () [Inferior 1 (process 51439) detached] Reported using DrKonqi 1893592 1 initial.dann 2019-11-27 02:10:12 +0000 Unsure if this is related, but may provide some insight. Whenever I resume my laptop from suspend, I get this crash trace: Application: Plasma (plasmashell), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7f3b3d83d880 (LWP 5485))] Thread 10 (Thread 0x7f3afacba700 (LWP 6864)): #0 0x00007f3b42ecc11c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007f3b43a94663 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5 #2 0x00007f3b43a946e9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5 #3 0x00007f3b457458c9 in () at /usr/lib64/libQt5Quick.so.5 #4 0x00007f3b45745b2a in () at /usr/lib64/libQt5Quick.so.5 #5 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #7 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 9 (Thread 0x7f3afa346700 (LWP 6107)): #0 0x00007f3b42ecc11c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007f3b43a94663 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5 #2 0x00007f3b43a946e9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5 #3 0x00007f3b457458c9 in () at /usr/lib64/libQt5Quick.so.5 #4 0x00007f3b45745b2a in () at /usr/lib64/libQt5Quick.so.5 #5 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #7 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 8 (Thread 0x7f3b14816700 (LWP 6063)): #0 0x00007f3b42ecc11c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007f3b43a94663 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5 #2 0x00007f3b43a946e9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5 #3 0x00007f3b457458c9 in () at /usr/lib64/libQt5Quick.so.5 #4 0x00007f3b45745b2a in () at /usr/lib64/libQt5Quick.so.5 #5 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #7 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 7 (Thread 0x7f3b15617700 (LWP 6062)): [KCrash Handler] #6 0x00007f3b4279d9cd in () at /usr/lib64/opengl/nvidia/lib/libGL.so.1 #7 0x00007f3b35ce7571 in () at /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so #8 0x00007f3b35ce51a7 in () at /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so #9 0x00007f3b3d1fb4ba in QXcbIntegration::createPlatformOpenGLContext(QOpenGLContext*) const () at /usr/lib64/libQt5XcbQpa.so.5 #10 0x00007f3b440302bf in QOpenGLContext::create() () at /usr/lib64/libQt5Gui.so.5 #11 0x00007f3b45740de1 in () at /usr/lib64/libQt5Quick.so.5 #12 0x00007f3b45742204 in () at /usr/lib64/libQt5Quick.so.5 #13 0x00007f3b45745ae8 in () at /usr/lib64/libQt5Quick.so.5 #14 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #15 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #16 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 6 (Thread 0x7f3b21a2a700 (LWP 6061)): #0 0x00007f3b43681293 in poll () at /lib64/libc.so.6 #1 0x00007f3b41ee8796 in () at /usr/lib64/libglib-2.0.so.0 #2 0x00007f3b41ee88bc in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #3 0x00007f3b43c7583b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007f3b43c22e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007f3b43a8dbf6 in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b21f154b7 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so #7 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #8 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #9 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 5 (Thread 0x7f3b22fff700 (LWP 5924)): #0 0x00007f3b41f334e4 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0 #1 0x00007f3b41ee8169 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0 #2 0x00007f3b41ee8740 in () at /usr/lib64/libglib-2.0.so.0 #3 0x00007f3b41ee88bc in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #4 0x00007f3b43c7583b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007f3b43c22e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b43a8dbf6 in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #7 0x00007f3b456c1486 in () at /usr/lib64/libQt5Quick.so.5 #8 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #9 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #10 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 4 (Thread 0x7f3b2de36700 (LWP 5865)): #0 0x00007f3b42ecc11c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007f3b43a94663 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5 #2 0x00007f3b43a946e9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5 #3 0x00007f3b457458c9 in () at /usr/lib64/libQt5Quick.so.5 #4 0x00007f3b45745b2a in () at /usr/lib64/libQt5Quick.so.5 #5 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #7 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 3 (Thread 0x7f3b36dee700 (LWP 5553)): #0 0x00007f3b41f334e4 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0 #1 0x00007f3b41ee8169 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0 #2 0x00007f3b41ee8740 in () at /usr/lib64/libglib-2.0.so.0 #3 0x00007f3b41ee88bc in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #4 0x00007f3b43c7583b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007f3b43c22e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #6 0x00007f3b43a8dbf6 in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #7 0x00007f3b453e6355 in () at /usr/lib64/libQt5Qml.so.5 #8 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #9 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #10 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 2 (Thread 0x7f3b37fff700 (LWP 5534)): #0 0x00007f3b42ed001a in __lll_unlock_wake () at /lib64/libpthread.so.0 #1 0x00007f3b42ec9a2a in __pthread_mutex_unlock_usercnt () at /lib64/libpthread.so.0 #2 0x00007f3b427cbaf5 in () at /usr/lib64/opengl/nvidia/lib/libGL.so.1 #3 0x00007f3b427d1208 in () at /usr/lib64/opengl/nvidia/lib/libGL.so.1 #4 0x00007f3b415cf102 in () at /usr/lib64/libnvidia-tls.so.390.132 #5 0x00007f3b41f2f0b0 in () at /usr/lib64/libglib-2.0.so.0 #6 0x00007f3b41ee826f in g_main_context_check () at /usr/lib64/libglib-2.0.so.0 #7 0x00007f3b41ee8740 in () at /usr/lib64/libglib-2.0.so.0 #8 0x00007f3b41ee88bc in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #9 0x00007f3b43c7583b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #10 0x00007f3b43c22e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #11 0x00007f3b43a8dbf6 in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #12 0x00007f3b4446f575 in () at /usr/lib64/libQt5DBus.so.5 #13 0x00007f3b43a8ee22 in () at /usr/lib64/libQt5Core.so.5 #14 0x00007f3b42ec5408 in start_thread () at /lib64/libpthread.so.0 #15 0x00007f3b4368d31f in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7f3b3d83d880 (LWP 5485)): #0 0x00007f3b42ecc11c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007f3b43a94663 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5 #2 0x00007f3b43a946e9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5 #3 0x00007f3b45743eab in () at /usr/lib64/libQt5Quick.so.5 #4 0x00007f3b45744f07 in () at /usr/lib64/libQt5Quick.so.5 #5 0x00007f3b45745543 in () at /usr/lib64/libQt5Quick.so.5 #6 0x00007f3b43fff915 in QWindow::event(QEvent*) () at /usr/lib64/libQt5Gui.so.5 #7 0x00007f3b457a541b in QQuickWindow::event(QEvent*) () at /usr/lib64/libQt5Quick.so.5 #8 0x00005623085f0733 in () #9 0x00007f3b446e1641 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #10 0x00007f3b446e8b58 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #11 0x00007f3b43c240d2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #12 0x00007f3b43ff6d86 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib64/libQt5Gui.so.5 #13 0x00007f3b43ff700d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib64/libQt5Gui.so.5 #14 0x00007f3b43fd4f4b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Gui.so.5 #15 0x00007f3b3d22291a in () at /usr/lib64/libQt5XcbQpa.so.5 #16 0x00007f3b41ee858e in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #17 0x00007f3b41ee8828 in () at /usr/lib64/libglib-2.0.so.0 #18 0x00007f3b41ee88bc in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #19 0x00007f3b43c75823 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #20 0x00007f3b43c22e9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #21 0x00007f3b43c2adb2 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #22 0x00005623085d9275 in () #23 0x00007f3b435aaefb in __libc_start_main () at /lib64/libc.so.6 #24 0x00005623085d96fa in _start () [Inferior 1 (process 5485) detached] 1893598 2 initial.dann 2019-11-27 03:41:23 +0000 Started up my music player after having locked the screen twice since cold boot, then locked the screen. I got one blink of the lock screen/black screen with this in journalctl: Nov 26 19:38:04 celestia kernel: kscreenlocker_g[15914]: segfault at 7ffc7e8e2fb0 ip 00007f3428d34248 sp 00007ffc7e8e2f70 error 6 in libQt5Gui.so.5.13.2[7f3428a6e000+356000] Odd since it recovered and I could log in. I've had issues with it not recovering and continually flashing black then background. I got a large block of these in my log: Nov 26 19:38:01 celestia kscreenlocker_greet[15914]: file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:96:9: QML Image: Binding loop detected for property "sourceSize" 1893599 3 initial.dann 2019-11-27 03:44:40 +0000 Wow, so as soon as I posted the comment and locked the screen again, it started to constantly loop black/background with no login field. I went into another tty and ran `loginctl unlock-session 1` to get me back in. I exited Strawberry and locked my screen again... it was fine! No issues whatsoever. So either this is a bug with the klockscreen component or perhaps Strawberry is not playing nice with it. I can mention it to the maintainer, but this could also be a kde issue, so I'll sit tight until someone reports in. Thanks for your time and energy. 1893725 4 initial.dann 2019-11-28 01:38:55 +0000 After updating to plasma 5.17.3, I was no longer able to reproduce the issue.