I had a lot of KWin crashes and blocking GUI issues, like:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7feef3b76940 (LWP 2296))]
Thread 6 (Thread 0x7feed1d6d700 (LWP 19361)):
#0 0x00007feef32d3b03 in select () at /lib64/libc.so.6
#1 0x00007feef09a6849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2 0x00007feef09a80c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3 0x00007feef09a8527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4 0x00007feef0957fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5 0x00007feef0792f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6 0x00007feeeb3849c8 in () at /usr/lib64/libQt5Qml.so.5
#7 0x00007feef07979e9 in () at /usr/lib64/libQt5Core.so.5
#8 0x00007feef359c734 in start_thread () at /lib64/libpthread.so.0
#9 0x00007feef32dad3d in clone () at /lib64/libc.so.6
Thread 5 (Thread 0x7feeb6879700 (LWP 2320)):
#0 0x00007feef35a10af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1 0x00007feeef92d93b in () at /usr/lib64/libQt5Script.so.5
#2 0x00007feeef92d969 in () at /usr/lib64/libQt5Script.so.5
#3 0x00007feef359c734 in start_thread () at /lib64/libpthread.so.0
#4 0x00007feef32dad3d in clone () at /lib64/libc.so.6
Thread 4 (Thread 0x7feebe2d8700 (LWP 2317)):
#0 0x00007feef32d3b03 in select () at /lib64/libc.so.6
#1 0x00007feef09a6849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2 0x00007feef09a80c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3 0x00007feef09a8527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4 0x00007feef0957fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5 0x00007feef0792f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6 0x00007feeeb3849c8 in () at /usr/lib64/libQt5Qml.so.5
#7 0x00007feef07979e9 in () at /usr/lib64/libQt5Core.so.5
#8 0x00007feef359c734 in start_thread () at /lib64/libpthread.so.0
#9 0x00007feef32dad3d in clone () at /lib64/libc.so.6
Thread 3 (Thread 0x7feed3fff700 (LWP 2301)):
#0 0x00007feef32d3b03 in select () at /lib64/libc.so.6
#1 0x00007feef09a6849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2 0x00007feef09a80c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3 0x00007feef09a8527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4 0x00007feef0957fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5 0x00007feef0792f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6 0x00007feeea5651d5 in () at /usr/lib64/libQt5DBus.so.5
#7 0x00007feef07979e9 in () at /usr/lib64/libQt5Core.so.5
#8 0x00007feef359c734 in start_thread () at /lib64/libpthread.so.0
#9 0x00007feef32dad3d in clone () at /lib64/libc.so.6
Thread 2 (Thread 0x7feeda2a5700 (LWP 2299)):
#0 0x00007feef32d249d in poll () at /lib64/libc.so.6
#1 0x00007feef24593e2 in () at /usr/lib64/libxcb.so.1
#2 0x00007feef245afcf in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3 0x00007feedaf55839 in () at /usr/lib64/libQt5XcbQpa.so.5
#4 0x00007feef07979e9 in () at /usr/lib64/libQt5Core.so.5
#5 0x00007feef359c734 in start_thread () at /lib64/libpthread.so.0
#6 0x00007feef32dad3d in clone () at /lib64/libc.so.6
Thread 1 (Thread 0x7feef3b76940 (LWP 2296)):
[KCrash Handler]
#6 0x00007feeeb370de0 in QQmlBinding::write(QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#7 0x00007feeeb37225a in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#8 0x00007feeeb37b306 in () at /usr/lib64/libQt5Qml.so.5
#9 0x00007feeeb30994b in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007feeeb309a07 in QQmlComponentPrivate::completeCreate() () at /usr/lib64/libQt5Qml.so.5
#11 0x00007feeeb309890 in QQmlComponent::create(QQmlContext*) () at /usr/lib64/libQt5Qml.so.5
#12 0x00007feed20ab7cf in () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#13 0x00007feef2efe047 in () at /usr/lib64/libkwin.so.5
#14 0x00007feef2de2891 in KWin::Client::createDecoration(QRect const&) () at /usr/lib64/libkwin.so.5
#15 0x00007feef2de35ab in KWin::Client::updateDecoration(bool, bool) () at /usr/lib64/libkwin.so.5
#16 0x00007feef2e44ed6 in KWin::Client::manage(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#17 0x00007feef2dc6994 in KWin::Workspace::createClient(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#18 0x00007feef2e330e0 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib64/libkwin.so.5
#19 0x00007feef0957270 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#20 0x00007feedaf53be4 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#21 0x00007feedaf55c3b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#22 0x00007feef0985166 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#23 0x00007feef1660e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#24 0x00007feef166549a in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#25 0x00007feef0959fc5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#26 0x00007feef095bdaa in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#27 0x00007feef09a84b4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#28 0x00007feedafb794d in () at /usr/lib64/libQt5XcbQpa.so.5
#29 0x00007feef0957fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#30 0x00007feef095fec6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#31 0x00007feef37ba9cc in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#32 0x00007feef32116e5 in __libc_start_main () at /lib64/libc.so.6
#33 0x0000000000400809 in _start ()
After setting window decoration from Plastik to Breeze, everything seems fine.
Hope it helps.
Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09)
Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
Kernel driver in use: i915
Kernel modules: i915