Bug 416871

Summary: Plasma crashes when idle
Product: [Plasma] plasmashell Reporter: chris.long
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: nate, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.12.9   
Target Milestone: 1.0   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description chris.long 2020-01-28 16:18:13 UTC 
Application: plasmashell (5.12.9)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 5.3.0-26-generic x86_64
Distribution: Ubuntu 18.04.3 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Nothing. I was looking away from my screen for a minute, and then I saw plasma had crashed.

- Unusual behavior I noticed:

My two external monitors were black. When I used the Displays control panel and disabled and then re-enabled one, it fixed it. I don't know if this is related to the crash or not.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f10d2698800 (LWP 9515))]

Thread 29 (Thread 0x7f0fefffe700 (LWP 6429)):
[KCrash Handler]
#6  0x0000000000000000 in  ()
#7  0x00007f10186c0394 in Plotter::render() (this=0x558c2400d420) at ./src/qmlcontrols/kquickcontrolsaddons/plotter.cpp:656
#8  0x00007f10cc59175f in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7f0fefffdbc0, r=0x558c2400d420, this=0x7f0fe8006220) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#9  0x00007f10cc59175f in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x558c236c9260, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3750
#10 0x00007f10cc591d17 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x558c236c9260, m=m@entry=0x7f10d05942e0 <QQuickWindow::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3629
#11 0x00007f10d0155413 in QQuickWindow::beforeRendering() (this=this@entry=0x558c236c9260) at .moc/moc_qquickwindow.cpp:498
#12 0x00007f10d015aa30 in QQuickWindowPrivate::renderSceneGraph(QSize const&) (this=this@entry=0x558c252369d0, size=...) at items/qquickwindow.cpp:449
#13 0x00007f10d0105bbc in QSGRenderThread::syncAndRender() (this=this@entry=0x558c24b07ea0) at scenegraph/qsgthreadedrenderloop.cpp:645
#14 0x00007f10d010aac8 in QSGRenderThread::run() (this=0x558c24b07ea0) at scenegraph/qsgthreadedrenderloop.cpp:729
#15 0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c24b07ea0) at thread/qthread_unix.cpp:368
#16 0x00007f10cb5056db in start_thread (arg=0x7f0fefffe700) at pthread_create.c:463
#17 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f0f811b0700 (LWP 6008)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c252663e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c25266390, cond=0x558c252663b8) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c252663b8, mutex=0x558c25266390) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c25266390) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c23ea3ed8, mutex=mutex@entry=0x558c23ea3ed0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c23ea3ec8) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c23ea3e50) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c23ea3e50) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c23ea3e50) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0f811b0700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f0f819b1700 (LWP 32251)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c24b81750) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c24b81700, cond=0x558c24b81728) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c24b81728, mutex=0x558c24b81700) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c24b81700) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c249a9628, mutex=mutex@entry=0x558c249a9620, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c249a9618) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c249a95a0) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c249a95a0) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c249a95a0) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0f819b1700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f0f909cd700 (LWP 32114)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c24c89ff0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c24c89fa0, cond=0x558c24c89fc8) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c24c89fc8, mutex=0x558c24c89fa0) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c24c89fa0) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c24c2e098, mutex=mutex@entry=0x558c24c2e090, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c24c2e088) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c24c2e010) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c24c2e010) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c24c2e010) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0f909cd700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f0f82fb2700 (LWP 32055)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c24c785c0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c24c78570, cond=0x558c24c78598) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c24c78598, mutex=0x558c24c78570) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c24c78570) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c2498cb98, mutex=mutex@entry=0x558c2498cb90, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c2498cb88) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c2498cb10) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c2498cb10) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c2498cb10) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0f82fb2700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f0f919cf700 (LWP 13187)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c236ba3d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c236ba380, cond=0x558c236ba3a8) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c236ba3a8, mutex=0x558c236ba380) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c236ba380) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c243eb8b8, mutex=mutex@entry=0x558c243eb8b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c243eb8a8) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c243eb830) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c243eb830) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c243eb830) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0f919cf700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f0f911ce700 (LWP 9571)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c246d0870) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c246d0820, cond=0x558c246d0848) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c246d0848, mutex=0x558c246d0820) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c246d0820) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c246cf0c8, mutex=mutex@entry=0x558c246cf0c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c246cf0b8) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c246cf040) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c246cf040) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c246cf040) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0f911ce700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f0fc9ffb700 (LWP 9553)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c23c64500) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c23c644b0, cond=0x558c23c644d8) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c23c644d8, mutex=0x558c23c644b0) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c23c644b0) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c222d6d38, mutex=mutex@entry=0x558c222d6d30, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c222d6d28) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c222d6cb0) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c222d6cb0) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c222d6cb0) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0fc9ffb700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f0fca7fc700 (LWP 9552)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fca7fbcd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fca7fbcd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fca7fbcd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fca7fc700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f0fcaffd700 (LWP 9551)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fcaffccd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fcaffccd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fcaffccd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101eee03d0 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0e22 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fcaffd700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f0fcb7fe700 (LWP 9550)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fcb7fdcd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fcb7fdcd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fcb7fdcd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101eee03d0 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0e22 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fcb7fe700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f0fcbfff700 (LWP 9549)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fcbffecd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fcbffecd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fcbffecd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fcbfff700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f0fd8ff9700 (LWP 9548)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fd8ff8cd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fd8ff8cd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fd8ff8cd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fd8ff9700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f0fd97fa700 (LWP 9547)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fd97f9cd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fd97f9cd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fd97f9cd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101eee03d0 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0e22 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fd97fa700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f0fd9ffb700 (LWP 9546)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fd9ffacd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fd9ffacd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fd9ffacd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fd9ffb700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f0fda7fc700 (LWP 9545)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fda7fbcd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fda7fbcd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fda7fbcd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fda7fc700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f0fdaffd700 (LWP 9544)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fdaffccd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fdaffccd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fdaffccd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101eee03d0 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0e22 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fdaffd700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f0fdb7fe700 (LWP 9543)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fdb7fdcd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fdb7fdcd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fdb7fdcd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fdb7fe700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f0fdbfff700 (LWP 9542)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fdbffecd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fdbffecd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fdbffecd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101f15efcc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0ecd in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fdbfff700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f0fe096a700 (LWP 9541)):
#0  0x00007f10cb50bf85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7f0fe0969cd0, expected=0, futex_word=0x7f0fd4000ca8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f10cb50bf85 in __pthread_cond_wait_common (abstime=0x7f0fe0969cd0, mutex=0x7f0fe818c458, cond=0x7f0fd4000c80) at pthread_cond_wait.c:539
#2  0x00007f10cb50bf85 in __pthread_cond_timedwait (cond=0x7f0fd4000c80, mutex=0x7f0fe818c458, abstime=0x7f0fe0969cd0) at pthread_cond_wait.c:667
#3  0x00007f101f0ed3a4 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#4  0x00007f101eee03d0 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#5  0x00007f101eee0e22 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#6  0x00007f101f0ec57c in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.440.33.01
#7  0x00007f10cb5056db in start_thread (arg=0x7f0fe096a700) at pthread_create.c:463
#8  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f0fe34f6700 (LWP 9535)):
#0  0x00007f10cbc6e0b4 in __GI___libc_read (fd=49, buf=0x7f0fe34f5b50, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f10c68202d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f10c67db0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f10c67db570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f10c67db6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f10cc5bb99b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0fdc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f10cc5609fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f0fe34f5d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f10cc37f23a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:515
#8  0x00007f0fe5e53747 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c2366ab70) at thread/qthread_unix.cpp:368
#10 0x00007f10cb5056db in start_thread (arg=0x7f0fe34f6700) at pthread_create.c:463
#11 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f0ff93fe700 (LWP 9532)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c225d1310) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c225d12c0, cond=0x558c225d12e8) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c225d12e8, mutex=0x558c225d12c0) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c225d12c0) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c223560e8, mutex=mutex@entry=0x558c223560e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c223560d8) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c22356060) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c22356060) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c22356060) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f0ff93fe700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f10016f5700 (LWP 9531)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c223510b0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c22351060, cond=0x558c22351088) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c22351088, mutex=0x558c22351060) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c22351060) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x558c2237bbf8, mutex=mutex@entry=0x558c2237bbf0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d010a6a8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x558c2237bbe8) at scenegraph/qsgthreadedrenderloop.cpp:245
#6  0x00007f10d010a6a8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x558c2237bb70) at scenegraph/qsgthreadedrenderloop.cpp:709
#7  0x00007f10d010ab0a in QSGRenderThread::run() (this=0x558c2237bb70) at scenegraph/qsgthreadedrenderloop.cpp:738
#8  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c2237bb70) at thread/qthread_unix.cpp:368
#9  0x00007f10cb5056db in start_thread (arg=0x7f10016f5700) at pthread_create.c:463
#10 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f1016b67700 (LWP 9526)):
#0  0x00007f10cbc72bf9 in __GI___poll (fds=0x7f1010005b30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f10c67db5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f10c67db6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f10cc5bb99b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f1010000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f10cc5609fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f1016b66d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f10cc37f23a in QThread::exec() (this=this@entry=0x558c21866ee0) at thread/qthread.cpp:515
#6  0x00007f10d008b2a6 in QQuickPixmapReader::run() (this=0x558c21866ee0) at util/qquickpixmapcache.cpp:868
#7  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c21866ee0) at thread/qthread_unix.cpp:368
#8  0x00007f10cb5056db in start_thread (arg=0x7f1016b67700) at pthread_create.c:463
#9  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f10a6ba2700 (LWP 9525)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f10d2060fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f10d2060f68, cond=0x7f10d2060f90) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x7f10d2060f90, mutex=0x7f10d2060f68) at pthread_cond_wait.c:655
#3  0x00007f10d1d6a5f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f10d1d6a639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f10cb5056db in start_thread (arg=0x7f10a6ba2700) at pthread_create.c:463
#6  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f10b1203700 (LWP 9524)):
#0  0x00007f10cbc6e0b4 in __GI___libc_read (fd=13, buf=0x7f10b1202b70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f10c68202d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f10c67db0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f10c67db570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f10c67db6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f10cc5bb99b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f10a0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f10cc5609fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f10b1202d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f10cc37f23a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:515
#8  0x00007f10cf4f16f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c20d72890) at thread/qthread_unix.cpp:368
#10 0x00007f10cb5056db in start_thread (arg=0x7f10b1203700) at pthread_create.c:463
#11 0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f10b3bf2700 (LWP 9523)):
#0  0x00007f10cbc72bf9 in __GI___poll (fds=0x7f10a8004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f10c67db5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f10c67db6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f10cc5bb99b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f10a8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f10cc5609fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f10b3bf1d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f10cc37f23a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f10cf4f16f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x558c20d1a5f0) at thread/qthread_unix.cpp:368
#8  0x00007f10cb5056db in start_thread (arg=0x7f10b3bf2700) at pthread_create.c:463
#9  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f10b9782700 (LWP 9522)):
#0  0x00007f10c6821649 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f10c67db5af in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f10c67db6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f10cc5bb99b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f10ac000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f10cc5609fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f10b9781d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f10cc37f23a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f10cca38d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f10cc38417d in QThreadPrivate::start(void*) (arg=0x7f10cccabd60) at thread/qthread_unix.cpp:368
#8  0x00007f10cb5056db in start_thread (arg=0x7f10b9782700) at pthread_create.c:463
#9  0x00007f10cbc7f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f10d2698800 (LWP 9515)):
#0  0x00007f10cb50b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558c21011c30) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f10cb50b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558c21011be0, cond=0x558c21011c08) at pthread_cond_wait.c:502
#2  0x00007f10cb50b9f3 in __pthread_cond_wait (cond=0x558c21011c08, mutex=0x558c21011be0) at pthread_cond_wait.c:655
#3  0x00007f10cc3855ab in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x558c21011be0) at thread/qwaitcondition_unix.cpp:143
#4  0x00007f10cc3855ab in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x558c24b07ee0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f10d0106e7d in QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*, bool) (this=this@entry=0x558c21000cc0, w=<optimized out>, w@entry=0x7f10b40096b0, inExpose=inExpose@entry=true) at scenegraph/qsgthreadedrenderloop.cpp:1210
#6  0x00007f10d010996d in QSGThreadedRenderLoop::handleExposure(QQuickWindow*) (this=this@entry=0x558c21000cc0, window=window@entry=0x558c236c9260) at scenegraph/qsgthreadedrenderloop.cpp:1004
#7  0x00007f10d010a259 in QSGThreadedRenderLoop::exposureChanged(QQuickWindow*) (this=0x558c21000cc0, window=0x558c236c9260) at scenegraph/qsgthreadedrenderloop.cpp:915
#8  0x00007f10ccdba3d5 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f10d01646c5 in QQuickWindow::event(QEvent*) (this=0x558c236c9260, e=0x7fff98592d20) at items/qquickwindow.cpp:1607
#10 0x00007f10cd56a83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f10cd572104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f10cc5629c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x558c236c9260, event=0x7fff98592d20) at kernel/qcoreapplication.cpp:1024
#13 0x00007f10ccdaf49f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#14 0x00007f10ccdb00dd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#15 0x00007f10ccd872eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007f10be70d260 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#17 0x00007f10c67db417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f10c67db650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f10c67db6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f10cc5bb97f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x558c20c195f0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#21 0x00007f10cc5609fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff98593010, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#22 0x00007f10cc569aa4 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1297
#23 0x0000558c1f284d6a in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:166

Reported using DrKonqi
Comment 1 Christoph Feck 2020-02-13 20:09:40 UTC 

*** This bug has been marked as a duplicate of bug 409735 ***
Comment 2 Nate Graham 2021-02-25 23:43:58 UTC 

*** This bug has been marked as a duplicate of bug 415080 ***