Application: kwin_x11 (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.29.0
Operating System: Linux 4.9.0-1-MANJARO x86_64
Distribution: "Manjaro Linux"

-- Information about the crash:
- What I was doing when the application crashed:
I just logged in for the first time after a cold boot.

- Custom settings of the application:
Compositing enabled
OpenGL 3.1
VSync: Automatic

Two monitors:
1 - Laptop screen, 1366x768
2 - HDMI, 1920x1080

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9d3f070840 (LWP 10921))]

Thread 8 (Thread 0x7f9d10bd9700 (LWP 11168)):
#0  0x00007f9d37d4810f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9d3b0be1f4 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f9d3b0be239 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f9d1163c700 (LWP 11151)):
#0  0x00007f9d37d484b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9d3bf4eae6 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9d3bf4a1e4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f9d3bf4dcf8 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f9d12ffe700 (LWP 10961)):
[KCrash Handler]
#6  0x00007f9d3c0bb672 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9d3c0588e6 in QLockFile::tryLock(int) () at /usr/lib/libQt5Core.so.5
#8  0x00007f9d3de60339 in  () at /usr/lib/libKF5ConfigCore.so.5
#9  0x00007f9d3de44310 in KConfig::sync() () at /usr/lib/libKF5ConfigCore.so.5
#10 0x00007f9d21ea3df5 in  () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#11 0x00007f9d3c15443e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#12 0x00007f9d3c161148 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007f9d3c154ee3 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f9d3ce0235c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007f9d3ce09ad1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f9d3c1288e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007f9d3c17c25e in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#18 0x00007f9d3c17a16a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f9d3c126d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007f9d3bf49063 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#21 0x00007f9d3bf4dcf8 in  () at /usr/lib/libQt5Core.so.5
#22 0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#23 0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f9d13fff700 (LWP 10959)):
#0  0x00007f9d3eac9551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f9d3c1785f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9d3c179efa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9d3c126d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9d3bf49063 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f9d36a9ce75 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f9d3bf4dcf8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f9d20e0d700 (LWP 10948)):
#0  0x00007f9d37d484b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9d3bf4eae6 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9d3bf4a1e4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f9d3bf4dcf8 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f9d228c4700 (LWP 10947)):
#0  0x00007f9d3eac9551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f9d3c178510 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9d3c179efa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9d3c126d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9d3bf49063 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f9d35c66de5 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f9d3bf4dcf8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f9d247e6700 (LWP 10946)):
#0  0x00007f9d3eac948d in poll () at /usr/lib/libc.so.6
#1  0x00007f9d3dc098e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f9d3dc0b679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f9d25292789 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f9d3bf4dcf8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f9d37d42454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f9d3ead27df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f9d3f070840 (LWP 10921)):
#0  0x00007f9d37d4810f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9d3dc09b57 in  () at /usr/lib/libxcb.so.1
#2  0x00007f9d3dc0b39f in  () at /usr/lib/libxcb.so.1
#3  0x00007f9d3dc0b4b2 in xcb_wait_for_reply () at /usr/lib/libxcb.so.1
#4  0x00007f9d3e5ec911 in KWin::Workspace::xStackingOrder() const () at /usr/lib/libkwin.so.5
#5  0x00007f9d3e653549 in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#6  0x00007f9d3c154ee3 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#7  0x00007f9d3ce0235c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#8  0x00007f9d3ce09ad1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#9  0x00007f9d3c1288e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#10 0x00007f9d3c17c25e in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#11 0x00007f9d3c17a16a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#12 0x00007f9d2530bddd in  () at /usr/lib/libQt5XcbQpa.so.5
#13 0x00007f9d3c126d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#14 0x00007f9d3c12f23c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#15 0x00007f9d3ed91495 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#16 0x00007f9d3ea0a291 in __libc_start_main () at /usr/lib/libc.so.6
#17 0x000000000040069a in _start ()

Reported using DrKonqi