https://bugs.kde.org/show_bug.cgi?id=411049

            Bug ID: 411049
           Summary: Kwin crash after turn off "Sync to VBlank"
           Product: kwin
           Version: unspecified
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kwin-bugs-n...@kde.org
          Reporter: jodr...@live.com
  Target Milestone: ---

Application: kwin_x11 (5.16.80)

Qt Version: 5.13.0
Frameworks Version: 5.62.0
Operating System: Linux 5.2.8-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:

Untick "Sync to VBlank" in nvidia settings tool, ran "kwin_x11 --replace" right
after.
It crashes again when you tick it again and run the command, not as consistent
though since at that point the compositor is turned off.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f88cc8e5880 (LWP 13933))]

Thread 8 (Thread 0x7f88b79ff700 (LWP 13997)):
#0  0x00007f88cc6a6e05 in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7f88ccca2fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f88cc6a6e05 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f88ccca2f68, cond=0x7f88ccca2f90) at pthread_cond_wait.c:502
#2  0x00007f88cc6a6e05 in __pthread_cond_wait (cond=0x7f88ccca2f90,
mutex=0x7f88ccca2f68) at pthread_cond_wait.c:655
#3  0x00007f88ccba71fa in  () at /usr/lib64/libQt5Script.so.5
#4  0x00007f88ccba721b in  () at /usr/lib64/libQt5Script.so.5
#5  0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#6  0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f88ab72e700 (LWP 13993)):
#0  0x00007f88cc6a716c in futex_reltimed_wait_cancelable (private=0,
reltime=0x7f88ab72dba0, expected=0, futex_word=0x55b92c6b7bd0) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f88cc6a716c in __pthread_cond_wait_common (abstime=0x7f88ab72dc50,
mutex=0x55b92c6b7b80, cond=0x55b92c6b7ba8) at pthread_cond_wait.c:533
#2  0x00007f88cc6a716c in __pthread_cond_timedwait (cond=0x55b92c6b7ba8,
mutex=0x55b92c6b7b80, abstime=0x7f88ab72dc50) at pthread_cond_wait.c:667
#3  0x00007f88cd122f68 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(this=0x55b92c6b7b80, deadline=...) at thread/qwaitcondition_unix.cpp:136
#4  0x00007f88cd122f68 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., this=0x55b92c6b7b80) at thread/qwaitcondition_unix.cpp:144
#5  0x00007f88cd122f68 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=<optimized out>, mutex=0x55b92c44a180, deadline=...) at
thread/qwaitcondition_unix.cpp:225
#6  0x00007f88cd1230a7 in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0x55b92c6acf10, mutex=mutex@entry=0x55b92c44a180,
time=<optimized out>) at thread/qwaitcondition_unix.cpp:209
#7  0x00007f88cd120621 in QThreadPoolThread::run() (this=0x55b92c6acf00) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:240
#8  0x00007f88cd11d112 in QThreadPrivate::start(void*) (arg=0x55b92c6acf00) at
thread/qthread_unix.cpp:360
#9  0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f88b4faf700 (LWP 13986)):
#0  0x00007f88cc6a71ba in futex_abstimed_wait_cancelable (private=0,
abstime=0x7f88b4faec80, expected=0, futex_word=0x7f88a4000d28) at
../sysdeps/unix/sysv/linux/futex-internal.h:205
#1  0x00007f88cc6a71ba in __pthread_cond_wait_common (abstime=0x7f88b4faec80,
mutex=0x55b92c473088, cond=0x7f88a4000d00) at pthread_cond_wait.c:539
#2  0x00007f88cc6a71ba in __pthread_cond_timedwait (cond=0x7f88a4000d00,
mutex=0x55b92c473088, abstime=0x7f88b4faec80) at pthread_cond_wait.c:667
#3  0x00007f88b5de7f64 in  () at /usr/lib64/libnvidia-glcore.so.435.17
#4  0x00007f88b5b4210c in  () at /usr/lib64/libnvidia-glcore.so.435.17
#5  0x00007f88b5de70ac in  () at /usr/lib64/libnvidia-glcore.so.435.17
#6  0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#7  0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f88c4dc7700 (LWP 13974)):
#0  0x00007f88ce802db6 in __GI_ppoll (fds=fds@entry=0x7f88b0000d28,
nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0,
sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f88cd336a39 in ppoll (__ss=<optimized out>, __timeout=<optimized
out>, __nfds=<optimized out>, __fds=<optimized out>) at
/usr/include/bits/poll2.h:77
#2  0x00007f88cd336a39 in qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f88b0000d28)
at kernel/qcore_unix.cpp:132
#3  0x00007f88cd336a39 in qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f88b0000d28)
at kernel/qcore_unix.cpp:129
#4  0x00007f88cd336a39 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
(fds=0x7f88b0000d28, nfds=1, timeout_ts=timeout_ts@entry=0x0) at
kernel/qcore_unix.cpp:153
#5  0x00007f88cd338031 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=<optimized out>, flags=...) at
../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f88cd2e323b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f88c4dc6d00, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f88cd11bf91 in QThread::exec() (this=this@entry=0x55b92c546350) at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f88cbe1c485 in QQmlThreadPrivate::run() (this=0x55b92c546350) at
/usr/src/debug/libqt5-qtdeclarative-5.13.0-ku.2.1.x86_64/src/qml/qml/ftw/qqmlthread.cpp:152
#9  0x00007f88cd11d112 in QThreadPrivate::start(void*) (arg=0x55b92c546350) at
thread/qthread_unix.cpp:360
#10 0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f88c5757700 (LWP 13951)):
#0  0x00007f88cc6a716c in futex_reltimed_wait_cancelable (private=0,
reltime=0x7f88c5756ba0, expected=0, futex_word=0x55b92c428ea4) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f88cc6a716c in __pthread_cond_wait_common (abstime=0x7f88c5756c50,
mutex=0x55b92c428e50, cond=0x55b92c428e78) at pthread_cond_wait.c:533
#2  0x00007f88cc6a716c in __pthread_cond_timedwait (cond=0x55b92c428e78,
mutex=0x55b92c428e50, abstime=0x7f88c5756c50) at pthread_cond_wait.c:667
#3  0x00007f88cd122f68 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(this=0x55b92c428e50, deadline=...) at thread/qwaitcondition_unix.cpp:136
#4  0x00007f88cd122f68 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., this=0x55b92c428e50) at thread/qwaitcondition_unix.cpp:144
#5  0x00007f88cd122f68 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=<optimized out>, mutex=0x55b92c44a180, deadline=...) at
thread/qwaitcondition_unix.cpp:225
#6  0x00007f88cd1230a7 in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0x55b92c4266f0, mutex=mutex@entry=0x55b92c44a180,
time=<optimized out>) at thread/qwaitcondition_unix.cpp:209
#7  0x00007f88cd120621 in QThreadPoolThread::run() (this=0x55b92c4266e0) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:240
#8  0x00007f88cd11d112 in QThreadPrivate::start(void*) (arg=0x55b92c4266e0) at
thread/qthread_unix.cpp:360
#9  0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f88c69e7700 (LWP 13946)):
#0  0x00007f88ce802db6 in __GI_ppoll (fds=fds@entry=0x7f88b800bb48,
nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0,
sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f88cd336a39 in ppoll (__ss=<optimized out>, __timeout=<optimized
out>, __nfds=<optimized out>, __fds=<optimized out>) at
/usr/include/bits/poll2.h:77
#2  0x00007f88cd336a39 in qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f88b800bb48)
at kernel/qcore_unix.cpp:132
#3  0x00007f88cd336a39 in qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f88b800bb48)
at kernel/qcore_unix.cpp:129
#4  0x00007f88cd336a39 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
(fds=0x7f88b800bb48, nfds=1, timeout_ts=timeout_ts@entry=0x0) at
kernel/qcore_unix.cpp:153
#5  0x00007f88cd338031 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=<optimized out>, flags=...) at
../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f88cd2e323b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f88c69e6cf0, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f88cd11bf91 in QThread::exec() (this=<optimized out>) at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f88cb7cf4f6 in  () at /usr/lib64/libQt5DBus.so.5
#9  0x00007f88cd11d112 in QThreadPrivate::start(void*) (arg=0x7f88cb851d80) at
thread/qthread_unix.cpp:360
#10 0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f88c768f700 (LWP 13944)):
#0  0x00007f88ce802cbf in __GI___poll (fds=0x7f88c768ec28, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f88cd03d742 in  () at /usr/lib64/libxcb.so.1
#2  0x00007f88cd03e3fa in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f88c7802f18 in QXcbEventQueue::run() (this=0x55b92c305260) at
qxcbeventqueue.cpp:228
#4  0x00007f88cd11d112 in QThreadPrivate::start(void*) (arg=0x55b92c305260) at
thread/qthread_unix.cpp:360
#5  0x00007f88cc6a0faa in start_thread (arg=<optimized out>) at
pthread_create.c:486
#6  0x00007f88ce80d73f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f88cc8e5880 (LWP 13933)):
[KCrash Handler]
#5  0x00007f88ce74bdd1 in __GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:50
#6  0x00007f88ce735549 in __GI_abort () at abort.c:79
#7  0x00007f88cced964f in  () at /usr/lib64/libstdc++.so.6
#8  0x00007f88ccee5088 in  () at /usr/lib64/libstdc++.so.6
#9  0x00007f88ccee50d3 in  () at /usr/lib64/libstdc++.so.6
#10 0x00007f88ccee5d41 in  () at /usr/lib64/libstdc++.so.6
#11 0x00007f88ce622593 in KWin::Workspace::removeDeleted(KWin::Deleted*) () at
/usr/lib64/libkwin.so.5
#12 0x00007f88ce5648e0 in KWin::Deleted::~Deleted() () at
/usr/lib64/libkwin.so.5
#13 0x00007f88ce564b49 in KWin::Deleted::~Deleted() () at
/usr/lib64/libkwin.so.5
#14 0x00007f88ce576972 in KWin::Compositor::stop() () at
/usr/lib64/libkwin.so.5
#15 0x00007f88ce576f3f in KWin::Compositor::~Compositor() () at
/usr/lib64/libkwin.so.5
#16 0x00007f88ce62ca57 in  () at /usr/lib64/libkwin.so.5
#17 0x00007f88ce70864e in  () at /usr/lib64/libkdeinit5_kwin_x11.so
#18 0x00007f88cd30f548 in QMetaObject::activate(QObject*, int, int, void**)
(sender=0x55b92c3cc8b0, signalOffset=<optimized out>,
local_signal_index=<optimized out>, argv=<optimized out>) at
kernel/qobject.cpp:3807
#19 0x00007f88ce27872c in KSelectionOwner::filterEvent(void*) () at
/usr/lib64/libKF5WindowSystem.so.5
#20 0x00007f88cd2e2117 in
QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*)
(this=<optimized out>, eventType=..., message=message@entry=0x7f88c000c180,
result=result@entry=0x7fffe0b78788) at kernel/qabstracteventdispatcher.cpp:484
#21 0x00007f88c77da981 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*)
(this=this@entry=0x55b92c2f21a0, event=event@entry=0x7f88c000c180) at
qxcbnativeinterface.h:101
#22 0x00007f88c77db6d6 in
QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x55b92c2f21a0, flags=...) at qxcbconnection.cpp:1019
#23 0x00007f88c78041dc in
QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x55b92c39cdb0, flags=...) at qxcbeventdispatcher.cpp:61
#24 0x00007f88cd2e323b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7fffe0b788d0, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#25 0x00007f88cd2eadb2 in QCoreApplication::exec() () at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#26 0x00007f88ce709006 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#27 0x00007f88ce736bcb in __libc_start_main (main=0x55b92a66d050, argc=1,
argv=0x7fffe0b78b68, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffe0b78b58) at ../csu/libc-start.c:308
#28 0x000055b92a66d08a in _start ()
[Inferior 1 (process 13933) detached]

Possible duplicates by query: bug 411017, bug 410978, bug 410935, bug 410884,
bug 410869.

Reported using DrKonqi

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