Created attachment 114304 [details]
kwin keeps on crashing

screen do not completely  refresh
crashes when moving a window

Application: kwin_x11 (5.12.6)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-20-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
<Indiquez-nous en détails ce que vous faisiez lors du plantage de l'application.>

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 0x7f2e03296cc0 (LWP 32701))]

Thread 6 (Thread 0x7f2db777e700 (LWP 32714)):
#0  0x00007f2dfbc4e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f2dff1e5fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f2dff1e5f68, cond=0x7f2dff1e5f90) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f2dff1e5f90, mutex=0x7f2dff1e5f68) at pthread_cond_wait.c:655
#3  0x00007f2dfeeef5f4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f2dfeeef639 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f2dfbc486db in start_thread (arg=0x7f2db777e700) at pthread_create.c:463
#6  0x00007f2e02bf388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f2dca851700 (LWP 32711)):
#0  0x00007f2e02be6cf6 in __GI_ppoll (fds=0x7f2dbc000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f2dfffe85c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f2dfffe9cde in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f2dfff919ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2dffdb022a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2dfa7346f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f2dffdb516d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2dfbc486db in start_thread (arg=0x7f2dca851700) at pthread_create.c:463
#8  0x00007f2e02bf388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f2dcbad2700 (LWP 32710)):
#0  0x00007f2dfbc4e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56227333cc98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56227333cc48, cond=0x56227333cc70) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56227333cc70, mutex=0x56227333cc48) at pthread_cond_wait.c:655
#3  0x00007f2dd895046b in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007f2dd8950197 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007f2dfbc486db in start_thread (arg=0x7f2dcbad2700) at pthread_create.c:463
#6  0x00007f2e02bf388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f2ddbfff700 (LWP 32709)):
#0  0x00007f2e02be6cf6 in __GI_ppoll (fds=0x7f2dd0000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f2dfffe85c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f2dfffe9cde in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f2dfff919ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2dffdb022a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2dfa7346f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f2dffdb516d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2dfbc486db in start_thread (arg=0x7f2ddbfff700) at pthread_create.c:463
#8  0x00007f2e02bf388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f2de2ea8700 (LWP 32706)):
#0  0x00007f2e02be6cf6 in __GI_ppoll (fds=0x7f2ddc00e928, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f2dfffe85c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f2dfffe9cde in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f2dfff919ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2dffdb022a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2df960dd45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007f2dffdb516d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2dfbc486db in start_thread (arg=0x7f2de2ea8700) at pthread_create.c:463
#8  0x00007f2e02bf388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f2e03296cc0 (LWP 32701)):
[KCrash Handler]
#6  0x00007f2dd8b385f5 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#7  0x00007f2dd8852bd0 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#8  0x00007f2dd884f1f9 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#9  0x00007f2dd886cfa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#10 0x00007f2dd88312bb in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#11 0x00007f2dd88315b8 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#12 0x00007f2dfb5d3897 in KWin::GLVertexBuffer::render(QRegion const&, unsigned int, bool) () from /usr/lib/x86_64-linux-gnu/libkwinglutils.so.11
#13 0x00007f2dfb5d3950 in KWin::GLVertexBuffer::render(unsigned int) () from /usr/lib/x86_64-linux-gnu/libkwinglutils.so.11
#14 0x00007f2dc0886d41 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#15 0x00007f2dc088b7d8 in KWin::SceneOpenGL::paintBackground(QRegion) () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#16 0x00007f2e02746ba4 in KWin::Scene::paintSimpleScreen(int, QRegion) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#17 0x00007f2dc0886c92 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#18 0x00007f2e02747167 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#19 0x00007f2e027554d5 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#20 0x00007f2dff757401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#21 0x00007f2e0275547d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#22 0x00007f2dff757401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#23 0x00007f2e0275547d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#24 0x00007f2dff757401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#25 0x00007f2e0275547d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#26 0x00007f2dff757401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#27 0x00007f2e0275547d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#28 0x00007f2e02746e5e in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#29 0x00007f2dc088c541 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#30 0x00007f2e027393e2 in KWin::Compositor::performCompositing() () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#31 0x00007f2dfffc30db in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f2e00d1182c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f2e00d190f4 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f2dfff939a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f2dfffebd8e in QTimerInfoList::activateTimers() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f2dfffe9f42 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f2dea70e5cd in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#38 0x00007f2dfff919ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007f2dfff9aa84 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007f2e02ecbdbb in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#41 0x00007f2e02af3b97 in __libc_start_main (main=0x562271963730, argc=3, argv=0x7ffe96bcc828, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe96bcc818) at ../csu/libc-start.c:310
#42 0x000056227196376a in _start ()