Application: kwin_x11 (5.8.4)

Qt Version: 5.7.0
Frameworks Version: 5.28.0
Operating System: Linux 4.4.36-1-lts x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
right after login - starting desktop in the morning

- Unusual behavior I noticed:
slow to load - have fast cpu but slow spinning disk
and network, cpu, memory and directory list widget on desktop

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbfd1da1840 (LWP 1167))]

Thread 6 (Thread 0x7fbf9f7fe700 (LWP 1455)):
#0  0x00007fbfcaa8510f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fbfcdddbac4 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fbfcdddbb09 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fbfcaa7f454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fbfd17f17df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fbfa5e2f700 (LWP 1267)):
[KCrash Handler]
#6  0x00007fbfcedd92d2 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fbfced76856 in QLockFile::tryLock(int) () at /usr/lib/libQt5Core.so.5
#8  0x00007fbfd0b7f2d9 in  () at /usr/lib/libKF5ConfigCore.so.5
#9  0x00007fbfd0b632b0 in KConfig::sync() () at /usr/lib/libKF5ConfigCore.so.5
#10 0x00007fbfb4ec2df5 in  () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#11 0x00007fbfcee719ce in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#12 0x00007fbfcee7e6d8 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fbfcee72473 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007fbfcfb25e0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007fbfcfb2d581 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007fbfcee45de0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007fbfcee996ae in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#18 0x00007fbfcee97618 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007fbfcee4423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007fbfcec670f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#21 0x00007fbfcec6bd78 in  () at /usr/lib/libQt5Core.so.5
#22 0x00007fbfcaa7f454 in start_thread () at /usr/lib/libpthread.so.0
#23 0x00007fbfd17f17df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fbfa7b09700 (LWP 1218)):
#0  0x00007fbfd17e8551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fbfcee95ac9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007fbfcee973b8 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007fbfcee4423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fbfcec670f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007fbfc97dd2d5 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007fbfcec6bd78 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fbfcaa7f454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fbfd17f17df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fbfb58e3700 (LWP 1187)):
#0  0x00007fbfd17e8551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fbfcee95ac9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007fbfcee973b8 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007fbfcee4423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fbfcec670f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007fbfc89a7e55 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007fbfcec6bd78 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fbfcaa7f454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fbfd17f17df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fbfb784b700 (LWP 1183)):
#0  0x00007fbfd17e848d in poll () at /usr/lib/libc.so.6
#1  0x00007fbfd09288e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fbfd092a679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fbfb82f7449 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fbfcec6bd78 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fbfcaa7f454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fbfd17f17df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fbfd1da1840 (LWP 1167)):
#0  0x00007fbfcaa8510f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fbfcec6cc2b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fbfcec6b91e in QThread::wait(unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007fbfb4ec2a9e in KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint) () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#4  0x00007fbfd1372a56 in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#5  0x00007fbfcee72473 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#6  0x00007fbfcfb25e0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#7  0x00007fbfcfb2d581 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#8  0x00007fbfcee45de0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#9  0x00007fbfcee996ae in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#10 0x00007fbfcee97618 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#11 0x00007fbfb837017d in  () at /usr/lib/libQt5XcbQpa.so.5
#12 0x00007fbfcee4423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#13 0x00007fbfcee4c73c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#14 0x00007fbfd1ab0495 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#15 0x00007fbfd1729291 in __libc_start_main () at /usr/lib/libc.so.6
#16 0x000000000040069a in _start ()

Reported using DrKonqi