Application: systemsettings5 (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-21-generic i686
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
After do Einstellungen .- Standardanwendungen - Fensterverwaltung 
switching to Compiz and back kwin crashes (no Windows decoration). This bug appears after upgrade to 16.04 each session after some minutes and after opening some windows (e.g. firefox, thunderbird, filezilla or even childwindows). It seams so, that if a windows will go up to fullscreen this bug appear more.  Will use for a temporary solution the compiz-manager. Btw: Im using a nvida card GeForce 210, openGL 2.0 and GLX (soft change) - but xrender will bring equal results.

-- Backtrace:
Application: Systemeinstellungen (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb07fa800 (LWP 16565))]

Thread 4 (Thread 0xb0251b40 (LWP 16566)):
#0  0xb7784c31 in __kernel_vsyscall ()
#1  0xb5cd8f8f in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0xb4c3e41d in ?? () from /usr/lib/i386-linux-gnu/libxcb.so.1
#3  0xb4c4059b in xcb_wait_for_event () from /usr/lib/i386-linux-gnu/libxcb.so.1
#4  0xb03c2273 in QXcbEventReader::run (this=0x9b31300) at qxcbconnection.cpp:1253
#5  0xb5fb543b in QThreadPrivate::start (arg=0x9b31300) at thread/qthread_unix.cpp:331
#6  0xb491d2c1 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#7  0x5c8b0824 in ?? ()
#8  0xbab80424 in ?? ()
#9  0x65000000 in ?? ()
#10 0x001015ff in ?? ()
#11 0xd3890000 in ?? ()
#12 0xfff0013d in ?? ()
#13 0x9d830fff in ?? ()
#14 0xc3fffec0 in ?? ()
#15 0x90669066 in ?? ()
#16 0x90669066 in ?? ()
#17 0x90669066 in ?? ()
#18 0xe8535657 in ?? ()
#19 0x000f352d in ?? ()
#20 0x5958c781 in ?? ()
#21 0xec810018 in ?? ()
#22 0x00000094 in ?? ()
#23 0xa4249c8b in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 3 (Thread 0xa7bfeb40 (LWP 16789)):
#0  0xb7784c31 in __kernel_vsyscall ()
#1  0xb5cd1c4f in read () at ../sysdeps/unix/syscall-template.S:84
#2  0xb4919ffb in ?? () from /usr/lib/nvidia-304/libGL.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 2 (Thread 0xa56fdb40 (LWP 16790)):
#0  0xb7784c31 in __kernel_vsyscall ()
#1  0xb5cd8f8f in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0xb4a8aa60 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb4a7c05c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb4a7c479 in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xa8cb2965 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb4aa2f5a in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb491d2c1 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#8  0x5c8b0824 in ?? ()
#9  0xbab80424 in ?? ()
#10 0x65000000 in ?? ()
#11 0x001015ff in ?? ()
#12 0xd3890000 in ?? ()
#13 0xfff0013d in ?? ()
#14 0x9d830fff in ?? ()
#15 0xc3fffec0 in ?? ()
#16 0x90669066 in ?? ()
#17 0x90669066 in ?? ()
#18 0x90669066 in ?? ()
#19 0xe8535657 in ?? ()
#20 0x000f352d in ?? ()
#21 0x5958c781 in ?? ()
#22 0xec810018 in ?? ()
#23 0x00000094 in ?? ()
#24 0xa4249c8b in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 1 (Thread 0xb07fa800 (LWP 16565)):
[KCrash Handler]
#7  0x00650074 in ?? ()
#8  0xb61c055f in QObject::disconnect (sender=0x9c6d200, signal=<optimized out>, receiver=0x9fb3898, method=0x9fa2729 "slotManagedTopLevelWidgetDestroyed()") at kernel/qobject.cpp:2932
#9  0xad38b55c in KParts::PartManager::~PartManager() () from /usr/lib/i386-linux-gnu/libKF5Parts.so.5
#10 0xad38b74a in KParts::PartManager::~PartManager() () from /usr/lib/i386-linux-gnu/libKF5Parts.so.5
#11 0xb61ba970 in QObjectPrivate::deleteChildren (this=0x9f51d20) at kernel/qobject.cpp:1946
#12 0xb61c3f4c in QObject::~QObject (this=0x9f51a88, __in_chrg=<optimized out>) at kernel/qobject.cpp:1024
#13 0xad3835b8 in KParts::Part::~Part() () from /usr/lib/i386-linux-gnu/libKF5Parts.so.5
#14 0xad38518e in KParts::ReadOnlyPart::~ReadOnlyPart() () from /usr/lib/i386-linux-gnu/libKF5Parts.so.5
#15 0xad5cccb1 in KHTMLPart::~KHTMLPart() () from /usr/lib/i386-linux-gnu/libKF5KHtml.so.5
#16 0xad5ccdfa in KHTMLPart::~KHTMLPart() () from /usr/lib/i386-linux-gnu/libKF5KHtml.so.5
#17 0xb61bb5d4 in qDeleteInEventHandler (o=0x9f51a88) at kernel/qobject.cpp:4455
#18 0xb61bd269 in QObject::event (this=0x9f51a88, e=0x9f88268) at kernel/qobject.cpp:1230
#19 0xb6d0f15a in QApplicationPrivate::notify_helper (this=0x9b12fb0, receiver=0x9f51a88, e=0x9f88268) at kernel/qapplication.cpp:3716
#20 0xb6d1481c in QApplication::notify (this=0xbf96c5f0, receiver=0x9f51a88, e=0x9f88268) at kernel/qapplication.cpp:3499
#21 0xb618c81f in QCoreApplication::notifyInternal (this=0xbf96c5f0, receiver=0x9f51a88, event=0x9f88268) at kernel/qcoreapplication.cpp:965
#22 0xb618eeff in QCoreApplication::sendEvent (event=0x9f88268, receiver=<optimized out>) at kernel/qcoreapplication.h:224
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9b12b38) at kernel/qcoreapplication.cpp:1593
#24 0xb618f3e7 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1451
#25 0xb61e4703 in postEventSourceDispatch (s=0x9b4ab48) at kernel/qeventdispatcher_glib.cpp:271
#26 0xb4a7be29 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0xb4a7c0c9 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#28 0xb4a7c194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#29 0xb61e4af3 in QEventDispatcherGlib::processEvents (this=0x9b5eb20, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#30 0xb03f78e1 in QPAEventDispatcherGlib::processEvents (this=0x9b5eb20, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:115
#31 0xb6189953 in QEventLoop::processEvents (this=0xbf96c518, flags=...) at kernel/qeventloop.cpp:128
#32 0xb6189daa in QEventLoop::exec (this=0xbf96c518, flags=...) at kernel/qeventloop.cpp:204
#33 0xb6192385 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#34 0xb6751931 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#35 0xb6d0b024 in QApplication::exec () at kernel/qapplication.cpp:2976
#36 0x08053fc0 in main ()

Possible duplicates by query: bug 362233, bug 362194, bug 362057, bug 359615, bug 359589.

Reported using DrKonqi