Application: kwin (4.8.4 (4.8.4))
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-29-generic-pae i686
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
- Unusual behavior I noticed:

Always i connect to my ubuntu vmware 9 virtual machine (ubuntu 12.04) kwin crash, connecting thought nx client from windows www.nomachine.com 

- Custom settings of the application:

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1ac2740 (LWP 2379))]

Thread 3 (Thread 0xae884b40 (LWP 2464)):
#0  0xb2aa7dcd in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0xb5edb315 in do_gettime (frac=0xae883fe0, sec=0xae883fd8) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0xb5fc5226 in QTimerInfoList::updateCurrentTime (this=0xadf00b34) at kernel/qeventdispatcher_unix.cpp:343
#4  0xb5fc6c2b in QEventDispatcherUNIXPrivate::doSelect (this=0xadf00498, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:186
#5  0xb5fc71f4 in QEventDispatcherUNIX::processEvents (this=0xadf00488, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#6  0xb5f9050d in QEventLoop::processEvents (this=0xae884240, flags=...) at kernel/qeventloop.cpp:149
#7  0xb5f907a9 in QEventLoop::exec (this=0xae884240, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5e7994c in QThread::exec (this=0x946ca20) at thread/qthread.cpp:501
#9  0xb5f6db5d in QInotifyFileSystemWatcherEngine::run (this=0x946ca20) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb5e7cde0 in QThreadPrivate::start (arg=0x946ca20) at thread/qthread_unix.cpp:298
#11 0xb2a5ed4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0xb7555d3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xadeffb40 (LWP 2465)):
#0  0xb777a424 in __kernel_vsyscall ()
#1  0xb2a6296b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb756364c in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0xb666e029 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb666e06f in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb2a5ed4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0xb7555d3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb1ac2740 (LWP 2379)):
[KCrash Handler]
#7  0xb74e1276 in free () from /lib/i386-linux-gnu/libc.so.6
#8  0xb67ebf9b in XFree (data=0x1) at ../../src/XlibInt.c:1701
#9  0xb6798c76 in XRRUpdateConfiguration (event=0xbfbc76ec) at ../../src/Xrandr.c:446
#10 0xb76825c7 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#11 0xb7672842 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#12 0xb54f7534 in qt_x11EventFilter (ev=0xbfbc76ec) at kernel/qapplication_x11.cpp:441
#13 qt_x11EventFilter (ev=0xbfbc76ec) at kernel/qapplication_x11.cpp:429
#14 0xb5507207 in QApplication::x11ProcessEvent (this=0xbfbc7938, event=0xbfbc76ec) at kernel/qapplication_x11.cpp:3444
#15 0xb5535a88 in QEventDispatcherX11::processEvents (this=0x92e0eb8, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#16 0xb5f9050d in QEventLoop::processEvents (this=0xbfbc7874, flags=...) at kernel/qeventloop.cpp:149
#17 0xb5f907a9 in QEventLoop::exec (this=0xbfbc7874, flags=...) at kernel/qeventloop.cpp:204
#18 0xb5f95eba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#19 0xb5479a74 in QApplication::exec () at kernel/qapplication.cpp:3820
#20 0xb76757c5 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#21 0x0804850b in ?? ()
#22 0xb74804d3 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#23 0x08048531 in _start ()

Possible duplicates by query: bug 309268, bug 308535, bug 307675, bug 307023, bug 301388.

Reported using DrKonqi