Application: kwin (4.6.1 (4.6.1))
KDE Platform Version: 4.6.1 (4.6.1)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-5-generic x86_64
Distribution: Ubuntu Natty (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Kwin seg  fault after applying sharpen in desktop effects, windows open in two virtual desktops

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f76bc5cf7a0 (LWP 1309))]

Thread 3 (Thread 0x7f769d9d3700 (LWP 1368)):
#0  0x00007f76bbe00223 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f76b81e636c in qt_safe_select (nfds=17, fdread=0x7f76a0000e10, fdwrite=0x7f76a00010a8, fdexcept=0x7f76a0001340, orig_timeout=<value optimized out>) at kernel/qcore_unix.cpp:82
#2  0x00007f76b81eb410 in QEventDispatcherUNIXPrivate::doSelect (this=0x7f76a0000c50, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:219
#3  0x00007f76b81ec08a in QEventDispatcherUNIX::processEvents (this=0x7f76a0000c30, flags=...) at kernel/qeventdispatcher_unix.cpp:919
#4  0x00007f76b81bd852 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f76b81bda8c in QEventLoop::exec (this=0x7f769d9d2db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f76b80d4904 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007f76b819fbdf in QInotifyFileSystemWatcherEngine::run (this=0x2cbec80) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f76b80d7155 in QThreadPrivate::start (arg=0x2cbec80) at thread/qthread_unix.cpp:320
#9  0x00007f76b27d0d8c in start_thread (arg=0x7f769d9d3700) at pthread_create.c:304
#10 0x00007f76bbe0817d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f769d1c2700 (LWP 1369)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f76bac67982 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f76baf81180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f76bac679b9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f76baf8f254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f76b27d0d8c in start_thread (arg=0x7f769d1c2700) at pthread_create.c:304
#4  0x00007f76bbe0817d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f76bc5cf7a0 (LWP 1309)):
[KCrash Handler]
#6  0x00007f769fab169e in r600_bo (radeon=0x22a5310, size=64, alignment=256, binding=8, usage=0) at r600_bo.c:43
#7  0x00007f769faa5e28 in r600_vertex_elements_build_fetch_shader (rctx=0x2870880, ve=0x306e540) at r600_asm.c:1243
#8  0x00007f769faa425b in r600_create_vertex_elements (ctx=0x2870880, count=2, elements=<value optimized out>) at r600_state_common.c:262
#9  0x00007f769fc1beaf in cso_set_vertex_elements (ctx=0x28607d0, count=2, states=<value optimized out>) at cso_cache/cso_context.c:1108
#10 0x00007f769fc6030e in util_gen_mipmap (ctx=0x2863480, psv=0x2856f80, face=0, baseLevel=0, lastLevel=10, filter=<value optimized out>) at util/u_gen_mipmap.c:1532
#11 0x00007f769fb5aaf3 in st_render_mipmap (ctx=0x2801be0, target=3553, texObj=0x36141e0) at state_tracker/st_gen_mipmap.c:94
#12 st_generate_mipmap (ctx=0x2801be0, target=3553, texObj=0x36141e0) at state_tracker/st_gen_mipmap.c:385
#13 0x00007f769faf2c67 in _mesa_GenerateMipmapEXT (target=3553) at main/fbobject.c:2177
#14 0x00007f76ba25c5a4 in KWin::GLTexture::enableFilter (this=0x31a2670) at ../../../kwin/lib/kwinglutils.cpp:589
#15 0x00007f76ba25c479 in KWin::GLTexture::setWrapMode (this=0x31a2670, mode=10496) at ../../../kwin/lib/kwinglutils.cpp:565
#16 0x00007f76ba26642d in KWin::ShaderEffect::loadData (this=0x28a8900, shadername=...) at ../../../kwin/lib/kwinshadereffect.cpp:73
#17 0x00007f76ba266bd2 in KWin::ShaderEffect::ShaderEffect (this=0x28a8900, shadername=...) at ../../../kwin/lib/kwinshadereffect.cpp:43
#18 0x00007f769f3a0384 in KWin::SharpenEffect::SharpenEffect (this=0x28a88f0) at ../../../kwin/effects/sharpen/sharpen.cpp:36
#19 0x00007f769f3a04e6 in KWin::effect_create_kwin4_effect_sharpen () at ../../../kwin/effects/sharpen/sharpen.cpp:32
#20 0x00007f76bc1a5f9b in KWin::EffectsHandlerImpl::loadEffect (this=0x2851470, name=...) at ../../kwin/effects.cpp:1128
#21 0x00007f76bc1a7181 in KWin::EffectsHandlerImpl::reconfigure (this=0x2851470) at ../../kwin/effects.cpp:143
#22 0x00007f76bc101350 in KWin::Workspace::slotReconfigure (this=0x28acf10) at ../../kwin/workspace.cpp:1166
#23 0x00007f76bc1041ce in KWin::Workspace::qt_metacall (this=0x28acf10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff8bd20c30) at ./workspace.moc:551
#24 0x00007f76b81d35e8 in QMetaObject::activate (sender=0x28ad270, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3287
#25 0x00007f76b81d21a9 in QObject::event (this=0x28ad270, e=<value optimized out>) at kernel/qobject.cpp:1190
#26 0x00007f76b757f9e4 in QApplicationPrivate::notify_helper (this=0x21b6270, receiver=0x28ad270, e=0x7fff8bd21330) at kernel/qapplication.cpp:4462
#27 0x00007f76b75843aa in QApplication::notify (this=<value optimized out>, receiver=0x28ad270, e=0x7fff8bd21330) at kernel/qapplication.cpp:4341
#28 0x00007f76bb903966 in KApplication::notify (this=0x7fff8bd21730, receiver=0x28ad270, event=0x7fff8bd21330) at ../../kdeui/kernel/kapplication.cpp:311
#29 0x00007f76b81be46c in QCoreApplication::notifyInternal (this=0x7fff8bd21730, receiver=0x28ad270, event=0x7fff8bd21330) at kernel/qcoreapplication.cpp:731
#30 0x00007f76b81ebf52 in sendEvent (this=0x21b6dc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#31 QTimerInfoList::activateTimers (this=0x21b6dc0) at kernel/qeventdispatcher_unix.cpp:604
#32 0x00007f76b81ec09b in QEventDispatcherUNIX::processEvents (this=0x2188340, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#33 0x00007f76b7627b8c in QEventDispatcherX11::processEvents (this=0x2188340, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#34 0x00007f76b81bd852 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#35 0x00007f76b81bda8c in QEventLoop::exec (this=0x7fff8bd21670, flags=...) at kernel/qeventloop.cpp:201
#36 0x00007f76b81c1e9b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#37 0x00007f76bc120f9c in kdemain (argc=<value optimized out>, argv=0x7fff8bd21dc8) at ../../kwin/main.cpp:542
#38 0x00007f76bbd40efe in __libc_start_main (main=0x400740 <main(int, char**)>, argc=3, ubp_av=0x7fff8bd21dc8, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff8bd21db8) at libc-start.c:226
#39 0x0000000000400669 in _start ()

Reported using DrKonqi