Application: kwin (4.8.5 (4.8.5))
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-32-generic x86_64
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Kwin crashes upon connecting to a tiger-vnc server session on Ubuntu 12.01 with Nouveau drivers from a Linux Mint 13 installation using Krdc.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4f74965780 (LWP 3700))]

Thread 2 (Thread 0x7f4f53fff700 (LWP 3713)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f4f70c23222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f4f70c23259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f4f68a5be9a in start_thread (arg=0x7f4f53fff700) at pthread_create.c:308
#4  0x00007f4f7416edbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4f74965780 (LWP 3700)):
[KCrash Handler]
#6  __GI___libc_free (mem=0x1) at malloc.c:2968
#7  0x00007f4f71baf819 in XFree (data=<optimized out>) at ../../src/XlibInt.c:1701
#8  0x00007f4f717572ee in XRRUpdateConfiguration (event=0x7fffaf91fc10) at ../../src/Xrandr.c:446
#9  0x00007f4f744a6c60 in KWin::Workspace::workspaceEvent (this=0x1e0b510, e=0x7fffaf91fc10) at ../../kwin/events.cpp:460
#10 0x00007f4f744984b8 in KWin::Application::x11EventFilter (this=0x7fffaf91ff20, e=0x7fffaf91fc10) at ../../kwin/main.cpp:359
#11 0x00007f4f6ed25b85 in qt_x11EventFilter (ev=0x7fffaf91fc10) at kernel/qapplication_x11.cpp:441
#12 qt_x11EventFilter (ev=0x7fffaf91fc10) at kernel/qapplication_x11.cpp:429
#13 0x00007f4f6ed34f98 in QApplication::x11ProcessEvent (this=0x7fffaf91ff20, event=0x7fffaf91fc10) at kernel/qapplication_x11.cpp:3444
#14 0x00007f4f6ed5fb3a in QEventDispatcherX11::processEvents (this=0x1c60ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#15 0x00007f4f6f932c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#16 0x00007f4f6f932ed7 in QEventLoop::exec (this=0x7fffaf91fe60, flags=...) at kernel/qeventloop.cpp:204
#17 0x00007f4f6f937f67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#18 0x00007f4f7449ac36 in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../kwin/main.cpp:541
#19 0x00007f4f7409c76d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=3, ubp_av=0x7fffaf920648, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffaf920638) at libc-start.c:226
#20 0x0000000000400661 in _start ()

Possible duplicates by query: bug 299728, bug 298370, bug 298304, bug 293648, bug 293209.

Reported using DrKonqi