Application: kwin_x11 (5.11.95)

Qt Version: 5.9.1
Frameworks Version: 5.42.0
Operating System: Linux 4.13.0-30-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
- What I was doing when the application crashed: I was trying to login! Everytime I use KDE + Plasma - Kwin_X11 fails.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc9f47ac940 (LWP 3410))]

Thread 7 (Thread 0x7fc9ba4d2700 (LWP 3440)):
#0  0x00007fc9ed141072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc9f070efb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc9ed141072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fc9f070ef68, cond=0x7fc9f070ef90) at pthread_cond_wait.c:502
#2  0x00007fc9ed141072 in __pthread_cond_wait (cond=0x7fc9f070ef90, mutex=0x7fc9f070ef68) at pthread_cond_wait.c:655
#3  0x00007fc9f041abd4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fc9f041ac19 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fc9ed13a7fc in start_thread (arg=0x7fc9ba4d2700) at pthread_create.c:465
#6  0x00007fc9f413fb5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fc9bb9c2700 (LWP 3439)):
#0  0x00007fc9f1522ad4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fc9f14cae3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fc9f12ea3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fc9ebc24f45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#4  0x00007fc9f12ef29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc9ed13a7fc in start_thread (arg=0x7fc9bb9c2700) at pthread_create.c:465
#6  0x00007fc9f413fb5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fc9bc2ba700 (LWP 3436)):
#0  0x00007fc9ed141072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558e5b798230) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc9ed141072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558e5b7981e0, cond=0x558e5b798208) at pthread_cond_wait.c:502
#2  0x00007fc9ed141072 in __pthread_cond_wait (cond=0x558e5b798208, mutex=0x558e5b7981e0) at pthread_cond_wait.c:655
#3  0x00007fc9c18e7d1b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007fc9c18e7a38 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007fc9ed13a7fc in start_thread (arg=0x7fc9bc2ba700) at pthread_create.c:465
#6  0x00007fc9f413fb5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc9bcc02700 (LWP 3435)):
#0  0x00007fc9ed141072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558e5bc072d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc9ed141072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x558e5bc07288, cond=0x558e5bc072b0) at pthread_cond_wait.c:502
#2  0x00007fc9ed141072 in __pthread_cond_wait (cond=0x558e5bc072b0, mutex=0x558e5bc07288) at pthread_cond_wait.c:655
#3  0x00007fc9c18e7d1b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007fc9c18e7a38 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007fc9ed13a7fc in start_thread (arg=0x7fc9bcc02700) at pthread_create.c:465
#6  0x00007fc9f413fb5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc9d1401700 (LWP 3434)):
#0  0x00007fc9f4133a4b in __GI_ppoll (fds=0x7fc9c8000d18, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fc9f1521151 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fc9f152286e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fc9f14cae3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc9f12ea3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc9ebc24f45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fc9f12ef29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc9ed13a7fc in start_thread (arg=0x7fc9d1401700) at pthread_create.c:465
#8  0x00007fc9f413fb5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc9d3952700 (LWP 3414)):
#0  0x00007fc9f4133a4b in __GI_ppoll (fds=0x7fc9cc00e6d8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fc9f1521151 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fc9f152286e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fc9f14cae3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc9f12ea3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc9eaaf0e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007fc9f12ef29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc9ed13a7fc in start_thread (arg=0x7fc9d3952700) at pthread_create.c:465
#8  0x00007fc9f413fb5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc9f47ac940 (LWP 3410)):
[KCrash Handler]
#6  0x00007fc9f4187b30 in __memcpy_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:130
#7  0x00007fc9c19ec4d5 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#8  0x00007fc9c1c5e0d4 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#9  0x00007fc9c1c5e11c in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#10 0x00007fc9c182d988 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#11 0x00007fc9c182faf3 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#12 0x00007fc9c17e3880 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#13 0x00007fc9c17dfc27 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#14 0x00007fc9c17fe7df in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#15 0x00007fc9c17c04a7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#16 0x00007fc9c17c0cca in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#17 0x00007fc9ec2d831f in QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007fc9ec2d93fd in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007fc9ec2decac in QSGBatchRenderer::Renderer::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007fc9ec2cf66d in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007fc9ec2cfb57 in QSGRenderer::renderScene(unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007fc9ec309f50 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007fc9ec3669b8 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#24 0x00007fc9ec41f8e8 in QQuickRenderControl::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#25 0x00007fc9ec41fbd0 in QQuickRenderControl::grab() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#26 0x00007fc9d16e0292 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#27 0x00007fc9f14fb9ff in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fc9f15083b7 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fc9f1508718 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fc9f14fc40b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fc9f224f46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007fc9f2256d34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007fc9f14ccde8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fc9f152491e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fc9f1522ad2 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007fc9da9bf9ad in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#37 0x00007fc9f14cae3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007fc9f14d3da4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fc9f4413dbb in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#40 0x00007fc9f404c1c1 in __libc_start_main (main=0x558e5a3ab730, argc=3, argv=0x7ffea4bdcff8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffea4bdcfe8) at ../csu/libc-start.c:308
#41 0x0000558e5a3ab76a in _start ()

Reported using DrKonqi