Application: kwin (4.7.4 (4.7.4))
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-16-generic x86_64
Distribution: Netrunner 4 Dryland

-- Information about the crash:
- What I was doing when the application crashed: 
I had just  attempted to create a new cell in Electric (elecronic CAD app) and on closing the new cell dialogue window to re-check the help/tutorial there was a slight hang and Kwin Crashed, no other applications were open/running at the time, i had however within the previous 30 mins DL and Installed the following packages 
picprog
gputils
gpism
gputils-doc
gputils-common

- Unusual behavior I noticed:
my netrunner dryland 4 has been sluggish for the last two or three days, and a couple of times i have had to restart just after booting up due to some apps not starting ie striggi, nepomuk, or having no sound.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f97df20e7a0 (LWP 1650))]

Thread 3 (Thread 0x7f97bef1f700 (LWP 1671)):
#0  0x00007f97dea42613 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f97dae45bc6 in qt_safe_select (nfds=18, fdread=0xbfe960, fdwrite=0xbfebf8, fdexcept=0xbfee90, orig_timeout=<optimized out>) at kernel/qcore_unix.cpp:82
#2  0x00007f97dae4b330 in QEventDispatcherUNIXPrivate::doSelect (this=0xbfe7a0, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:219
#3  0x00007f97dae4b833 in QEventDispatcherUNIX::processEvents (this=0xd431f0, flags=...) at kernel/qeventdispatcher_unix.cpp:918
#4  0x00007f97dae1ccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f97dae1cef7 in QEventLoop::exec (this=0x7f97bef1edb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f97dad3427f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f97dadffcbf in QInotifyFileSystemWatcherEngine::run (this=0xba3e60) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f97dad36d05 in QThreadPrivate::start (arg=0xba3e60) at thread/qthread_unix.cpp:331
#9  0x00007f97d4d58efc in start_thread (arg=0x7f97bef1f700) at pthread_create.c:304
#10 0x00007f97dea4959d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f97be71e700 (LWP 1672)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f97dd89ffe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f97dd8a0019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f97d4d58efc in start_thread (arg=0x7f97be71e700) at pthread_create.c:304
#4  0x00007f97dea4959d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f97df20e7a0 (LWP 1650)):
[KCrash Handler]
#6  QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively (this=<optimized out>) at graphicsview/qgraphicsitem.cpp:5379
#7  0x00007f97da797503 in update (rect=..., this=0x1c26300) at graphicsview/qgraphicsitem.cpp:5688
#8  QGraphicsItem::update (this=0x1c26300, rect=...) at graphicsview/qgraphicsitem.cpp:5681
#9  0x00007f97c537877d in ?? () from /usr/lib/kde4/kwin3_aurorae.so
#10 0x00007f97da7948a3 in QGraphicsItem::sceneEvent (this=0x1c26300, event=0x7fff97d687d0) at graphicsview/qgraphicsitem.cpp:6730
#11 0x00007f97da7bccea in QGraphicsScenePrivate::sendMouseEvent (this=0x13aab70, mouseEvent=0x7fff97d687d0) at graphicsview/qgraphicsscene.cpp:1291
#12 0x00007f97da7bd6b5 in QGraphicsScene::mouseReleaseEvent (this=<optimized out>, mouseEvent=0x7fff97d687d0) at graphicsview/qgraphicsscene.cpp:4121
#13 0x00007f97c537e539 in ?? () from /usr/lib/kde4/kwin3_aurorae.so
#14 0x00007f97da7cb92f in QGraphicsScene::event (this=0x1c370d0, event=0x7fff97d687d0) at graphicsview/qgraphicsscene.cpp:3453
#15 0x00007f97da1cd474 in notify_helper (e=0x7fff97d687d0, receiver=0x1c370d0, this=0xb8a2a0) at kernel/qapplication.cpp:4486
#16 QApplicationPrivate::notify_helper (this=0xb8a2a0, receiver=0x1c370d0, e=0x7fff97d687d0) at kernel/qapplication.cpp:4458
#17 0x00007f97da1d22e1 in QApplication::notify (this=0x7fff97d69af0, receiver=0x1c370d0, e=0x7fff97d687d0) at kernel/qapplication.cpp:4365
#18 0x00007f97de535466 in KApplication::notify (this=0x7fff97d69af0, receiver=0x1c370d0, event=0x7fff97d687d0) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007f97dae1dafc in QCoreApplication::notifyInternal (this=0x7fff97d69af0, receiver=0x1c370d0, event=0x7fff97d687d0) at kernel/qcoreapplication.cpp:787
#20 0x00007f97da7e7036 in QGraphicsView::mouseReleaseEvent (this=0x1bac850, event=0x7fff97d68fb0) at graphicsview/qgraphicsview.cpp:3336
#21 0x00007f97da21dcea in QWidget::event (this=0x1bac850, event=0x7fff97d68fb0) at kernel/qwidget.cpp:8295
#22 0x00007f97da5c65b6 in QFrame::event (this=0x1bac850, e=0x7fff97d68fb0) at widgets/qframe.cpp:557
#23 0x00007f97da7e9dfb in QGraphicsView::viewportEvent (this=0x1bac850, event=0x7fff97d68fb0) at graphicsview/qgraphicsview.cpp:2864
#24 0x00007f97dae1dc88 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x1de5c80, event=0x7fff97d68fb0) at kernel/qcoreapplication.cpp:902
#25 0x00007f97da1cd43f in notify_helper (e=0x7fff97d68fb0, receiver=0x1de5c80, this=0xb8a2a0) at kernel/qapplication.cpp:4482
#26 QApplicationPrivate::notify_helper (this=0xb8a2a0, receiver=0x1de5c80, e=0x7fff97d68fb0) at kernel/qapplication.cpp:4458
#27 0x00007f97da1d2cbb in QApplication::notify (this=<optimized out>, receiver=0x1de5c80, e=0x7fff97d68fb0) at kernel/qapplication.cpp:4047
#28 0x00007f97de535466 in KApplication::notify (this=0x7fff97d69af0, receiver=0x1de5c80, event=0x7fff97d68fb0) at ../../kdeui/kernel/kapplication.cpp:311
#29 0x00007f97dae1dafc in QCoreApplication::notifyInternal (this=0x7fff97d69af0, receiver=0x1de5c80, event=0x7fff97d68fb0) at kernel/qcoreapplication.cpp:787
#30 0x00007f97da1ce442 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#31 QApplicationPrivate::sendMouseEvent (receiver=0x1de5c80, event=0x7fff97d68fb0, alienWidget=0x0, nativeWidget=0x1de5c80, buttonDown=0x0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3146
#32 0x00007f97da24d9d5 in QETWidget::translateMouseEvent (this=0x1de5c80, event=<optimized out>) at kernel/qapplication_x11.cpp:4571
#33 0x00007f97da24c94e in QApplication::x11ProcessEvent (this=0x7fff97d69af0, event=0x7fff97d697e0) at kernel/qapplication_x11.cpp:3693
#34 0x00007f97da275eba in QEventDispatcherX11::processEvents (this=0xb4bf40, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#35 0x00007f97dae1ccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#36 0x00007f97dae1cef7 in QEventLoop::exec (this=0x7fff97d69a30, flags=...) at kernel/qeventloop.cpp:201
#37 0x00007f97dae21789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#38 0x00007f97ded62cf6 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#39 0x00007f97de98730d in __libc_start_main (main=0x400630, argc=3, ubp_av=0x7fff97d6a158, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff97d6a148) at libc-start.c:226
#40 0x0000000000400661 in _start ()

Possible duplicates by query: bug 294726, bug 293733, bug 291460, bug 288168, bug 284028.

Reported using DrKonqi