Application: kwin (4.11.16)
KDE Platform Version: 4.14.6
Qt Version: 4.8.6
Operating System: Linux 3.18.9-100.fc20.x86_64 x86_64
Distribution: "Fedora release 20 (Heisenbug)"

-- Information about the crash:
- What I was doing when the application crashed:  Using xrandr to change screen resolutions.  kwin seemed to restart fine though and if it weren't for this bug report opening it might have gone un-noticed.  Perhaps this is then a bug in the bug reporter?

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f6ad1c7f940 (LWP 1818))]

Thread 2 (Thread 0x7f6ab3fff700 (LWP 1837)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003ebaf8ef0b in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x3ebb28df00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x0000003ebaf8ef49 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x0000003e99807ee5 in start_thread (arg=0x7f6ab3fff700) at pthread_create.c:309
#4  0x0000003e990f4d1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f6ad1c7f940 (LWP 1818)):
[KCrash Handler]
#6  gen7_update_renderbuffer_surface (brw=0x7f6ac181e038, rb=0x1748080, layered=<optimized out>, unit=0) at gen7_wm_surface_state.c:469
#7  0x00007f6ac241159d in brw_update_renderbuffer_surfaces (brw=0x7f6ac181e038) at brw_wm_surface_state.c:723
#8  0x00007f6ac23eff20 in brw_upload_state (brw=brw@entry=0x7f6ac181e038) at brw_state_upload.c:649
#9  0x00007f6ac23a9169 in brw_try_draw_prims (indirect=<optimized out>, max_index=<optimized out>, min_index=<optimized out>, ib=<optimized out>, nr_prims=<optimized out>, prims=<optimized out>, arrays=<optimized out>, ctx=0x7f6ac181e038) at brw_draw.c:468
#10 brw_draw_prims (ctx=0x7f6ac181e038, prims=<optimized out>, nr_prims=<optimized out>, ib=<optimized out>, index_bounds_valid=<optimized out>, min_index=0, max_index=17, unused_tfb_object=0x0, indirect=0x0) at brw_draw.c:568
#11 0x00007f6ac21fe359 in vbo_draw_arrays (ctx=0x7f6ac181e038, mode=4, start=0, count=18, numInstances=1, baseInstance=0) at ../../src/mesa/vbo/vbo_exec_array.c:667
#12 0x000000384361237e in KWin::GLVertexBuffer::draw (this=this@entry=0x17a6a70, region=..., primitiveMode=primitiveMode@entry=4, first=first@entry=0, count=18, hardwareClipping=hardwareClipping@entry=false) at /usr/src/debug/kde-workspace-4.11.16/kwin/libkwineffects/kwinglutils.cpp:1949
#13 0x0000003843615579 in KWin::GLVertexBuffer::render (this=0x17a6a70, region=..., primitiveMode=4, hardwareClipping=<optimized out>) at /usr/src/debug/kde-workspace-4.11.16/kwin/libkwineffects/kwinglutils.cpp:1902
#14 0x00000038436155ed in KWin::GLVertexBuffer::render (this=this@entry=0x17a6a70, primitiveMode=primitiveMode@entry=4) at /usr/src/debug/kde-workspace-4.11.16/kwin/libkwineffects/kwinglutils.cpp:1896
#15 0x0000003842edbc6a in KWin::SceneOpenGL2::doPaintBackground (this=<optimized out>, vertices=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/scene_opengl.cpp:748
#16 0x0000003842edf555 in KWin::SceneOpenGL::paintBackground (this=this@entry=0x19c3990, region=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/scene_opengl.cpp:460
#17 0x0000003842ecefc6 in KWin::Scene::paintSimpleScreen (this=this@entry=0x19c3990, orig_mask=orig_mask@entry=8, region=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/scene.cpp:367
#18 0x0000003842eccb45 in KWin::Scene::finalPaintScreen (this=0x19c3990, mask=mask@entry=8, region=..., data=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/scene.cpp:198
#19 0x0000003842ef027d in KWin::EffectsHandlerImpl::paintScreen (this=0x1f619c0, mask=mask@entry=8, region=..., data=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/effects.cpp:375
#20 0x0000003841a11baf in KWin::Effect::paintScreen (this=this@entry=0x1f83840, mask=mask@entry=8, region=..., data=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/libkwineffects/kwineffects.cpp:522
#21 0x0000003842ef022a in KWin::EffectsHandlerImpl::paintScreen (this=0x1f619c0, mask=8, region=..., data=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/effects.cpp:372
#22 0x0000003842ecf196 in KWin::Scene::paintScreen (this=this@entry=0x19c3990, mask=mask@entry=0x7fff7d3f453c, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fff7d3f4550, validRegion=validRegion@entry=0x7fff7d3f4560) at /usr/src/debug/kde-workspace-4.11.16/kwin/scene.cpp:148
#23 0x0000003842ee29de in KWin::SceneOpenGL::paint (this=0x19c3990, damage=..., toplevels=...) at /usr/src/debug/kde-workspace-4.11.16/kwin/scene_opengl.cpp:389
#24 0x0000003842ec66eb in KWin::Compositor::performCompositing (this=0x1704d20) at /usr/src/debug/kde-workspace-4.11.16/kwin/composite.cpp:624
#25 0x0000003ea2d9f711 in QObject::event (this=0x1704d20, e=<optimized out>) at kernel/qobject.cpp:1184
#26 0x0000003ea61cae6c in QApplicationPrivate::notify_helper (this=this@entry=0x1581c70, receiver=receiver@entry=0x1704d20, e=e@entry=0x7fff7d3f4a90) at kernel/qapplication.cpp:4565
#27 0x0000003ea61d17c5 in QApplication::notify (this=this@entry=0x7fff7d3f4f90, receiver=receiver@entry=0x1704d20, e=e@entry=0x7fff7d3f4a90) at kernel/qapplication.cpp:4351
#28 0x000000383944a61a in KApplication::notify (this=0x7fff7d3f4f90, receiver=0x1704d20, event=0x7fff7d3f4a90) at /usr/src/debug/kdelibs-4.14.6/kdeui/kernel/kapplication.cpp:311
#29 0x0000003ea2d868dd in QCoreApplication::notifyInternal (this=0x7fff7d3f4f90, receiver=0x1704d20, event=event@entry=0x7fff7d3f4a90) at kernel/qcoreapplication.cpp:953
#30 0x0000003ea2db8143 in sendEvent (event=0x7fff7d3f4a90, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#31 QTimerInfoList::activateTimers (this=0x1582738) at kernel/qeventdispatcher_unix.cpp:621
#32 0x0000003ea2db81c0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1534cc0) at kernel/qeventdispatcher_unix.cpp:878
#33 0x0000003ea2db8bf0 in QEventDispatcherUNIX::processEvents (this=this@entry=0x1534cc0, flags=...) at kernel/qeventdispatcher_unix.cpp:948
#34 0x0000003ea626d606 in QEventDispatcherX11::processEvents (this=0x1534cc0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#35 0x0000003ea2d8536f in QEventLoop::processEvents (this=this@entry=0x7fff7d3f4de0, flags=...) at kernel/qeventloop.cpp:149
#36 0x0000003ea2d856bd in QEventLoop::exec (this=this@entry=0x7fff7d3f4de0, flags=...) at kernel/qeventloop.cpp:204
#37 0x0000003ea2d8ad89 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#38 0x0000003ea61c94ec in QApplication::exec () at kernel/qapplication.cpp:3823
#39 0x0000003842e7e39e in kdemain (argc=3, argv=0x7fff7d3f50e8) at /usr/src/debug/kde-workspace-4.11.16/kwin/main.cpp:597
#40 0x0000003e99021d65 in __libc_start_main (main=0x4009d0 <main(int, char**)>, argc=3, argv=0x7fff7d3f50e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7d3f50d8) at libc-start.c:285
#41 0x0000000000400a01 in _start ()

Possible duplicates by query: bug 343307, bug 339760.

Reported using DrKonqi