Hello
I have similar behaviour and I have managed to capture the backtrace from the
fault (below).
Let me know if I can help with anything else.
Thanks
Tim
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 0x7f4bf57d78c0 (LWP 143875))]
Thread 4 (Thread 0x7f4beebe8700 (LWP 143888)):
#0 futex_abstimed_wait_cancelable (private=0, abstime=0x7f4beebe7c50,
clockid=-289506352,
expected=0, futex_word=0x55f64fc93484) at ../sysdeps/nptl/futex-internal.h:320
#1 __pthread_cond_wait_common (abstime=0x7f4beebe7c50, clockid=-289506352,
mutex=0x55f64fc93430,
cond=0x55f64fc93458) at pthread_cond_wait.c:520
#2 __pthread_cond_timedwait (cond=0x55f64fc93458, mutex=0x55f64fc93430,
abstime=0x7f4beebe7c50) at
pthread_cond_wait.c:656
#3 0x7f4bfbc52aa4 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x7f4bfbc50ae1 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x7f4bfbc4cb01 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x7f4bfb06aea7 in start_thread (arg=) at
pthread_create.c:477
#7 0x7f4bfd3ead4f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 3 (Thread 0x7f4be700 (LWP 143880)):
#0 0x7f4bfd3e0456 in __ppoll (fds=0x7f4be800d0b8, nfds=1,
timeout=, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1 0x7f4bfbe7f779 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x7f4bfbe80e13 in
QEventDispatcherUNIX::processEvents(QFlags)
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x7f4bfbe2ab7b in
QEventLoop::exec(QFlags) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x7f4bfbc4b9be in QThread::exec() () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x7f4bfa18ba27 in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#6 0x7f4bfbc4cb01 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x7f4bfb06aea7 in start_thread (arg=) at
pthread_create.c:477
#8 0x7f4bfd3ead4f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 2 (Thread 0x7f4bf50d7700 (LWP 143878)):
#0 0x7f4bfd3e035f in __GI___poll (fds=0x7f4bf50d6be8, nfds=1, timeout=-1)
at
../sysdeps/unix/sysv/linux/poll.c:29
#1 0x7f4bfbb62d02 in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2 0x7f4bfbb6498a in xcb_wait_for_event () from
/lib/x86_64-linux-gnu/libxcb.so.1
#3 0x7f4bf53f4260 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4 0x7f4bfbc4cb01 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x7f4bfb06aea7 in start_thread (arg=) at
pthread_create.c:477
#6 0x7f4bfd3ead4f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 1 (Thread 0x7f4bf57d78c0 (LWP 143875)):
[KCrash Handler]
#4 0x7f4bfbccdef0 in QString::operator=(QString const&) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x7f4bfd0fd10c in ?? () from /lib/x86_64-linux-gnu/libkwin.so.5
#6 0x7f4bee034910 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#7 0x7f4bee0387f9 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#8 0x7f4bee038a28 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#9 0x7f4bfd0fed52 in
KWin::Decoration::DecorationBridge::createDecoration(KWin::AbstractClient*) ()
from
/lib/x86_64-linux-gnu/libkwin.so.5
#10 0x7f4bfd0d34cc in KWin::Client::createDecoration(QRect const&) () from
/lib/x86_64-linux-gnu/libkwin.so.5
#11 0x7f4bfd0d7758 in KWin::Client::updateDecoration(bool, bool) () from
/lib/x86_64-linux-gnu/libkwin.so.5
#12 0x7f4bfd16b246 in KWin::Client::manage(unsigned int, bool) () from
/lib/x86_64-linux-gnu/libkwin.so.5
#13 0x7f4bfd2079a5 in KWin::Workspace::createClient(unsigned int, bool) ()
from
/lib/x86_64-linux-gnu/libkwin.so.5
#14 0x7f4bfd20ba1f in KWin::Workspace::initWithX11() () from
/lib/x86_64-linux-gnu/libkwin.so.5
#15 0x7f4bfd20cd51 in KWin::Workspace::init() () from
/lib/x86_64-linux-gnu/libkwin.so.5
#16 0x7f4bfd20d56d in KWin::Workspace::Workspace(QString const&) () from
/lib/x86_64-linux-gnu/libkwin.so.5
#17 0x7f4bfd168054 in KWin::Application::createWorkspace() () from
/lib/x86_64-linux-gnu/libkwin.so.5
#18 0x7f4bfd4b9e6c in ?? () from
/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#19 0x7f4bfbe62796 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x7f4bfd4ba2cc in ?? () from
/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#21 0x7f4bfbe62796 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x7f4bfce44633 in ?? () from
/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#23 0x7f4bfbe5811f in QObject::event(QEvent*) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x7f4bfc8ee14f in
