Application: kwin (4.9.3)
KDE Platform Version: 4.9.3
Qt Version: 4.8.3
Operating System: Linux 3.5.0-21-generic x86_64
Distribution: Ubuntu 12.10

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

I had a KDE session active in tty7. I started a new session (with a different username) in tty8. As it loaded up, I switched back to tty7 with Ctrl+Alt+7. The screen displayed some artefacts, then displayed the kwin crash dialogue.

-- 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 0x7f7e44d6c780 (LWP 1994))]

Thread 3 (Thread 0x7f7e35f33700 (LWP 2074)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f7e54d11cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f7e54d11d09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f7e4ce15e9a in start_thread (arg=0x7f7e35f33700) at pthread_create.c:308
#4  0x00007f7e57de8cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f7e3db16700 (LWP 3130)):
#0  0x00007f7e57de2023 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f7e53a90023 in qt_safe_select (nfds=16, fdread=0x7f7e38000aa8, fdwrite=0x7f7e38000d40, fdexcept=0x7f7e38000fd8, orig_timeout=0x0) at kernel/qcore_unix.cpp:83
#2  0x00007f7e53a949e4 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f7e380008f0, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:223
#3  0x00007f7e53a95572 in QEventDispatcherUNIX::processEvents (this=0x7f7e3802c520, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#4  0x00007f7e53a632bf in QEventLoop::processEvents (this=this@entry=0x7f7e3db15dd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7e53a63548 in QEventLoop::exec (this=0x7f7e3db15dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f7e53964b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f7e53a439af in QInotifyFileSystemWatcherEngine::run (this=0x30d90c0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f7e53967aec in QThreadPrivate::start (arg=0x30d90c0) at thread/qthread_unix.cpp:338
#9  0x00007f7e4ce15e9a in start_thread (arg=0x7f7e3db16700) at pthread_create.c:308
#10 0x00007f7e57de8cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7e44d6c780 (LWP 1994)):
[KCrash Handler]
#6  brw_update_renderbuffer_surface (brw=0x23d9c10, rb=0x23bc660, unit=0) at brw_wm_surface_state.c:1109
#7  0x00007f7e3c059aa0 in brw_update_renderbuffer_surfaces (brw=0x23d9c10) at brw_wm_surface_state.c:1205
#8  0x00007f7e3c043ae2 in brw_upload_state (brw=brw@entry=0x23d9c10) at brw_state_upload.c:498
#9  0x00007f7e3c0311d7 in brw_try_draw_prims (max_index=23, min_index=71490856, ib=<optimized out>, nr_prims=<optimized out>, prim=0x7fff0442dd10, arrays=<optimized out>, ctx=0x23d9c10) at brw_draw.c:493
#10 brw_draw_prims (ctx=0x23d9c10, prim=0x7fff0442dd10, nr_prims=<optimized out>, ib=<optimized out>, index_bounds_valid=<optimized out>, min_index=0, max_index=23, tfb_vertcount=0x0) at brw_draw.c:589
#11 0x00007f7e37ba9b54 in vbo_draw_arrays (ctx=0x23d9c10, mode=4, start=0, count=24, numInstances=1, baseInstance=<optimized out>) at ../../../../../src/mesa/vbo/vbo_exec_array.c:645
#12 0x00007f7e5476789e in KWin::GLVertexBufferPrivate::corePainting (this=0x25dbd30, region=..., primitiveMode=4, hardwareClipping=<optimized out>) at ../../../kwin/libkwineffects/kwinglutils.cpp:1218
#13 0x00007f7e54767dbd in KWin::GLVertexBuffer::render (this=this@entry=0x23b5180, region=..., primitiveMode=primitiveMode@entry=4, hardwareClipping=hardwareClipping@entry=false) at ../../../kwin/libkwineffects/kwinglutils.cpp:1341
#14 0x00007f7e54767e41 in KWin::GLVertexBuffer::render (this=0x23b5180, primitiveMode=4) at ../../../kwin/libkwineffects/kwinglutils.cpp:1333
#15 0x00007f7e58174731 in KWin::SceneOpenGL::paintBackground (this=this@entry=0x22f8160, region=...) at ../../kwin/scene_opengl.cpp:210
#16 0x00007f7e58164270 in KWin::Scene::paintSimpleScreen (this=this@entry=0x22f8160, orig_mask=orig_mask@entry=8, region=...) at ../../kwin/scene.cpp:323
#17 0x00007f7e58161ee2 in KWin::Scene::finalPaintScreen (this=0x22f8160, mask=8, region=..., data=...) at ../../kwin/scene.cpp:192
#18 0x00007f7e58181523 in KWin::EffectsHandlerImpl::paintScreen (this=0x2666f60, mask=mask@entry=8, region=..., data=...) at ../../kwin/effects.cpp:246
#19 0x00007f7e565d3bf7 in KWin::Effect::paintScreen (this=this@entry=0x26b5b40, mask=mask@entry=8, region=..., data=...) at ../../../kwin/libkwineffects/kwineffects.cpp:142
#20 0x00007f7e581814cb in KWin::EffectsHandlerImpl::paintScreen (this=0x2666f60, mask=mask@entry=8, region=..., data=...) at ../../kwin/effects.cpp:243
#21 0x00007f7e565d3bf7 in KWin::Effect::paintScreen (this=this@entry=0x28695e0, mask=mask@entry=8, region=..., data=...) at ../../../kwin/libkwineffects/kwineffects.cpp:142
#22 0x00007f7e581814cb in KWin::EffectsHandlerImpl::paintScreen (this=0x2666f60, mask=8, region=..., data=...) at ../../kwin/effects.cpp:243
#23 0x00007f7e5816352b in KWin::Scene::paintScreen (this=0x22f8160, mask=0x7fff0442e3bc, region=0x7fff0442e460) at ../../kwin/scene.cpp:146
#24 0x00007f7e581780ed in KWin::SceneOpenGL::paint (this=0x22f8160, damage=..., toplevels=...) at ../../kwin/scene_opengl_glx.cpp:499
#25 0x00007f7e5815d228 in KWin::Workspace::performCompositing (this=0x238ba10) at ../../kwin/composite.cpp:443
#26 0x00007f7e53a7926c in QObject::event (this=0x238ba10, e=<optimized out>) at kernel/qobject.cpp:1157
#27 0x00007f7e52e0be9c in QApplicationPrivate::notify_helper (this=this@entry=0x21aaeb0, receiver=receiver@entry=0x238ba10, e=e@entry=0x7fff0442eb40) at kernel/qapplication.cpp:4562
#28 0x00007f7e52e1030a in QApplication::notify (this=0x7fff0442f180, receiver=0x238ba10, e=0x7fff0442eb40) at kernel/qapplication.cpp:4423
#29 0x00007f7e578d71d6 in KApplication::notify (this=0x7fff0442f180, receiver=0x238ba10, event=0x7fff0442eb40) at ../../kdeui/kernel/kapplication.cpp:311
#30 0x00007f7e53a6456e in QCoreApplication::notifyInternal (this=0x7fff0442f180, receiver=0x238ba10, event=0x7fff0442eb40) at kernel/qcoreapplication.cpp:915
#31 0x00007f7e53a95462 in sendEvent (event=0x7fff0442eb40, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QTimerInfoList::activateTimers (this=0x21aba68) at kernel/qeventdispatcher_unix.cpp:611
#33 0x00007f7e53a954c0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x2140ad0) at kernel/qeventdispatcher_unix.cpp:868
#34 0x00007f7e53a95618 in QEventDispatcherUNIX::processEvents (this=0x2140ad0, flags=...) at kernel/qeventdispatcher_unix.cpp:930
#35 0x00007f7e52eb1a3f in QEventDispatcherX11::processEvents (this=0x2140ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#36 0x00007f7e53a632bf in QEventLoop::processEvents (this=this@entry=0x7fff0442ee90, flags=...) at kernel/qeventloop.cpp:149
#37 0x00007f7e53a63548 in QEventLoop::exec (this=0x7fff0442ee90, flags=...) at kernel/qeventloop.cpp:204
#38 0x00007f7e53a68708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#39 0x00007f7e58116e14 in kdemain (argc=3, argv=0x7fff0442f2c8) at ../../kwin/main.cpp:545
#40 0x00007f7e57d1676d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=3, ubp_av=0x7fff0442f2c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0442f2b8) at libc-start.c:226
#41 0x00000000004006d1 in _start ()

Possible duplicates by query: bug 311682, bug 310612, bug 310417, bug 310027, bug 309415.

Reported using DrKonqi