Application: kwin_x11 (5.8.9)

Qt Version: 5.6.1
Frameworks Version: 5.36.0
Operating System: Linux 4.13.0-38-generic x86_64
Distribution: Linux Mint 18.3 Sylvia

-- Information about the crash:
- What I was doing when the application crashed:
Il problema si presenta all'avvio del sisyema operativo
- Unusual behavior I noticed:

A volte si disattivano gli effetti del desktop

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f42fbdc5940 (LWP 1497))]

Thread 8 (Thread 0x7f42d9fef700 (LWP 2908)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43108b0574 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f43108b05b9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f430d5886ba in start_thread (arg=0x7f42d9fef700) at pthread_create.c:333
#4  0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f42db398700 (LWP 2653)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f42f072548b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f42f0725397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f430d5886ba in start_thread (arg=0x7f42db398700) at pthread_create.c:333
#4  0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f42dbb99700 (LWP 2652)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f42f072548b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f42f0725397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f430d5886ba in start_thread (arg=0x7f42dbb99700) at pthread_create.c:333
#4  0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f42f1a53700 (LWP 2648)):
[KCrash Handler]
#6  _mm_loadu_si128(long long __vector(2) const*) (__P=<optimized out>) at /usr/lib/gcc/x86_64-linux-gnu/5/include/emmintrin.h:698
#7  simdEncodeAscii (end=<optimized out>, src=<optimized out>, nextAscii=<optimized out>, dst=<optimized out>) at codecs/qutfcodec.cpp:55
#8  QUtf8::convertFromUnicode (uc=0xfe8626cf0528, len=<optimized out>, state=0x0) at codecs/qutfcodec.cpp:212
#9  0x00007f4311748485 in QUtf8Codec::convertFromUnicode (this=<optimized out>, uc=<optimized out>, len=<optimized out>, state=<optimized out>) at codecs/qutfcodec.cpp:662
#10 0x00007f43115a88b1 in QTextCodec::fromUnicode (state=0x0, length=32579, in=0xfe8626cf0528, this=<optimized out>) at ../../include/QtCore/../../src/corelib/codecs/qtextcodec.h:105
#11 QString::toLocal8Bit_helper (data=0xfe8626cf0528, size=32579) at tools/qstring.cpp:4572
#12 0x00007f431167e41f in QString::toLocal8Bit() const & (this=0x27d84e0) at ../../include/QtCore/../../src/corelib/tools/qstring.h:517
#13 QFile::encodeName (fileName=...) at ../../include/QtCore/../../src/corelib/io/qfile.h:82
#14 QLockFilePrivate::tryLock_sys (this=this@entry=0x27d84e0) at io/qlockfile_unix.cpp:180
#15 0x00007f431161ba80 in QLockFile::tryLock (this=<optimized out>, timeout=-1) at io/qlockfile.cpp:212
#16 0x00007f4312c79f79 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ConfigCore.so.5
#17 0x00007f4312c64187 in KConfig::sync() () from /usr/lib/x86_64-linux-gnu/libKF5ConfigCore.so.5
#18 0x00007f42f8931175 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#19 0x00007f4311718c24 in QtPrivate::QSlotObjectBase::call (a=0x7f42f1a52830, r=0x25d4780, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#20 QMetaObject::activate (sender=sender@entry=0x25d4780, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3715
#21 0x00007f43117191b7 in QMetaObject::activate (sender=sender@entry=0x25d4780, m=m@entry=0x7f4311934720 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3595
#22 0x00007f4311793e80 in QTimer::timeout (this=this@entry=0x25d4780) at .moc/moc_qtimer.cpp:198
#23 0x00007f43117250b8 in QTimer::timerEvent (this=0x25d4780, e=<optimized out>) at kernel/qtimer.cpp:247
#24 0x00007f43117196d3 in QObject::event (this=0x25d4780, e=<optimized out>) at kernel/qobject.cpp:1278
#25 0x00007f4312021afc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x25d4780, e=0x7f42f1a52b40) at kernel/qapplication.cpp:3804
#26 0x00007f4312027036 in QApplication::notify (this=0x7ffee675a180, receiver=0x25d4780, e=0x7f42f1a52b40) at kernel/qapplication.cpp:3561
#27 0x00007f43116ec2a8 in QCoreApplication::notifyInternal2 (receiver=0x25d4780, event=event@entry=0x7f42f1a52b40) at kernel/qcoreapplication.cpp:1015
#28 0x00007f431174024e in QCoreApplication::sendEvent (event=0x7f42f1a52b40, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#29 QTimerInfoList::activateTimers (this=0x7f42e4001118) at kernel/qtimerinfo_unix.cpp:637
#30 0x00007f431173e060 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x7f42e40008c0) at kernel/qeventdispatcher_unix.cpp:549
#31 0x00007f431173eb04 in QEventDispatcherUNIX::processEvents (this=0x7f42e40008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:611
#32 0x00007f43116e9ffa in QEventLoop::exec (this=this@entry=0x7f42f1a52c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#33 0x00007f43115129e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#34 0x00007f4311517808 in QThreadPrivate::start (arg=0x25d1de0) at thread/qthread_unix.cpp:341
#35 0x00007f430d5886ba in start_thread (arg=0x7f42f1a53700) at pthread_create.c:333
#36 0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f42f2b08700 (LWP 2264)):
#0  0x00007f43138ce5d3 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f431173cbcf in qt_safe_select (nfds=13, fdread=fdread@entry=0x7f42e0000a78, fdwrite=fdwrite@entry=0x7f42e0000d08, fdexcept=fdexcept@entry=0x7f42e0000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f431173e60e in QEventDispatcherUNIX::select (timeout=0x0, exceptfds=0x7f42e0000f98, writefds=0x7f42e0000d08, readfds=0x7f42e0000a78, nfds=<optimized out>, this=0x7f42e00008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f42e00008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f431173eb22 in QEventDispatcherUNIX::processEvents (this=0x7f42e00008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f43116e9ffa in QEventLoop::exec (this=this@entry=0x7f42f2b07c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f43115129e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#7  0x00007f430c6e26b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f4311517808 in QThreadPrivate::start (arg=0x2614020) at thread/qthread_unix.cpp:341
#9  0x00007f430d5886ba in start_thread (arg=0x7f42f2b08700) at pthread_create.c:333
#10 0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f42f935f700 (LWP 1654)):
#0  0x00007f43138ce5d3 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f431173cbcf in qt_safe_select (nfds=8, fdread=fdread@entry=0x7f42ec000a78, fdwrite=fdwrite@entry=0x7f42ec000d08, fdexcept=fdexcept@entry=0x7f42ec000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f431173e60e in QEventDispatcherUNIX::select (timeout=0x0, exceptfds=0x7f42ec000f98, writefds=0x7f42ec000d08, readfds=0x7f42ec000a78, nfds=<optimized out>, this=0x7f42ec0008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f42ec0008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f431173eb22 in QEventDispatcherUNIX::processEvents (this=0x7f42ec0008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f43116e9ffa in QEventLoop::exec (this=this@entry=0x7f42f935ec50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f43115129e4 in QThread::exec (this=this@entry=0x7f4313f60d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#7  0x00007f4313eed515 in QDBusConnectionManager::run (this=0x7f4313f60d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:189
#8  0x00007f4311517808 in QThreadPrivate::start (arg=0x7f4313f60d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#9  0x00007f430d5886ba in start_thread (arg=0x7f42f935f700) at pthread_create.c:333
#10 0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f42fae9f700 (LWP 1653)):
#0  0x00007f43138cc74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4312a31c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4312a338d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f42fbb4cd29 in QXcbEventReader::run (this=0x2442670) at qxcbconnection.cpp:1325
#4  0x00007f4311517808 in QThreadPrivate::start (arg=0x2442670) at thread/qthread_unix.cpp:341
#5  0x00007f430d5886ba in start_thread (arg=0x7f42fae9f700) at pthread_create.c:333
#6  0x00007f43138d841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f42fbdc5940 (LWP 1497)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4312a31eb9 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4312a33617 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4312a33721 in xcb_wait_for_reply () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f431349220a in KWin::EffectsHandlerImpl::announceSupportProperty(QByteArray const&, KWin::Effect*) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#5  0x00007f43109e37b3 in ?? () from /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#6  0x00007f43109e1146 in ?? () from /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#7  0x00007f431349bfc0 in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#8  0x00007f431349c4ff in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#9  0x00007f43134a1b4f in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#10 0x00007f4311719719 in QObject::event (this=0x2822ae0, e=<optimized out>) at kernel/qobject.cpp:1256
#11 0x00007f4312021afc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x2822ae0, e=0x2834820) at kernel/qapplication.cpp:3804
#12 0x00007f4312027036 in QApplication::notify (this=0x7ffee675a180, receiver=0x2822ae0, e=0x2834820) at kernel/qapplication.cpp:3561
#13 0x00007f43116ec2a8 in QCoreApplication::notifyInternal2 (receiver=0x2822ae0, event=event@entry=0x2834820) at kernel/qcoreapplication.cpp:1015
#14 0x00007f43116ee16a in QCoreApplication::sendEvent (event=0x2834820, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2410880) at kernel/qcoreapplication.cpp:1650
#16 0x00007f431173ea02 in QEventDispatcherUNIX::processEvents (this=0x246dff0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:579
#17 0x00007f42fbbc08fd in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#18 0x00007f43116e9ffa in QEventLoop::exec (this=this@entry=0x7ffee675a070, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#19 0x00007f43116f26bc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#20 0x00007f4313ba4226 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#21 0x00007f43137f1830 in __libc_start_main (main=0x400730, argc=3, argv=0x7ffee675a308, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffee675a2f8) at ../csu/libc-start.c:291
#22 0x0000000000400769 in _start ()

Reported using DrKonqi