Application: kwin_x11 (5.11.1)

Qt Version: 5.9.2
Frameworks Version: 5.39.0
Operating System: Linux 4.13.7-1-ARCH x86_64
Distribution: "Arch Linux"

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

- Unusual behavior I noticed:

at the time of starting section I had problems since the screen went completely dark for a minute with thirty seconds, this was the last and the only thing I was doing

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f077ca6d840 (LWP 3333))]

Thread 10 (Thread 0x7f0733eff700 (LWP 3709)):
#0  0x00007f07753b138d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f0778950ef7 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f0778950f39 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f0740839700 (LWP 3680)):
#0  0x00007f07753b16cd in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f07797f9311 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f07797f43f6 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f07797f7fcb in  () at /usr/lib/libQt5Core.so.5
#4  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f074123f700 (LWP 3497)):
#0  0x00007f07753b138d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f0746a3e81c in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007f0746a3e728 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f0741b81700 (LWP 3496)):
#0  0x00007f07753b138d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f0746a3e81c in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007f0746a3e728 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f0759173700 (LWP 3489)):
[KCrash Handler]
#5  0x00007f077996b511 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f077990105e in QLockFile::tryLock(int) () at /usr/lib/libQt5Core.so.5
#7  0x00007f077b74e2ba in  () at /usr/lib/libKF5ConfigCore.so.5
#8  0x00007f077b731725 in KConfig::sync() () at /usr/lib/libKF5ConfigCore.so.5
#9  0x00007f07604fec2b in  () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#10 0x00007f0779a0bd3f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#11 0x00007f0779a18b48 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#12 0x00007f0779a18eb9 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007f0779a0c61b in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f077a6f9f2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007f077a701a06 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f07799dc060 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007f0779a36118 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#18 0x00007f0779a34214 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f07799da48b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007f07797f327e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#21 0x00007f07797f7fcb in  () at /usr/lib/libQt5Core.so.5
#22 0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#23 0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f075a574700 (LWP 3448)):
#0  0x00007f077c3fbe46 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f0779a32813 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f0779a33faf in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f07799da48b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f07797f327e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f0773eb3bc9 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f07797f7fcb in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f075afb9700 (LWP 3431)):
#0  0x00007f07753b16cd in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f07797f9311 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f07797f43f6 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f07797f7fcb in  () at /usr/lib/libQt5Core.so.5
#4  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f0760f2d700 (LWP 3422)):
#0  0x00007f077c3fbe46 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f0779a32813 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f0779a33faf in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f07799da48b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f07797f327e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f0773054376 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f07797f7fcb in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f07635b8700 (LWP 3418)):
#0  0x00007f077c3fbd4b in poll () at /usr/lib/libc.so.6
#1  0x00007f077b4f98e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f077b4fb679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f076449385a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f07797f7fcb in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f07753ab08a in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f077c40624f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f077ca6d840 (LWP 3333)):
#0  0x00007f07753b138d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f077b4f9b57 in  () at /usr/lib/libxcb.so.1
#2  0x00007f077b4fb39f in  () at /usr/lib/libxcb.so.1
#3  0x00007f077b4fb4b2 in xcb_wait_for_reply () at /usr/lib/libxcb.so.1
#4  0x00007f077bf850e2 in  () at /usr/lib/libkwin.so.5
#5  0x00007f077bf8e449 in KWin::EffectsHandlerImpl::announceSupportProperty(QByteArray const&, KWin::Effect*) () at /usr/lib/libkwin.so.5
#6  0x00007f0778c87d21 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#7  0x00007f0778c83408 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#8  0x00007f077bf98070 in  () at /usr/lib/libkwin.so.5
#9  0x00007f077bf9ea97 in  () at /usr/lib/libkwin.so.5
#10 0x00007f0779a0c662 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#11 0x00007f077a6f9f2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007f077a701a06 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#13 0x00007f07799dc060 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f07799de8b6 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#15 0x00007f0779a33dc6 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#16 0x00007f07644f88ce in  () at /usr/lib/libQt5XcbQpa.so.5
#17 0x00007f07799da48b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007f07799e34d8 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#19 0x00007f077c6cf6e3 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#20 0x00007f077c330f6a in __libc_start_main () at /usr/lib/libc.so.6
#21 0x000055fac66d77aa in _start ()

Reported using DrKonqi