Application: kwin_x11 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-39-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
when some kind of input is given to the system, and the monitor turns on
- Custom settings of the application:
Ubuntu 15.04 Linux UX51VZ 3.19.0-39-generic #44-Ubuntu SMP Tue Dec 1 14:39:05 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
nVidia driver 352.63
X.Org 11.0

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5279a2e800 (LWP 1464))]

Thread 3 (Thread 0x7f525a03e700 (LWP 1502)):
#0  0x00007f52794fb743 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5277d45101 in qt_safe_select (nfds=16, fdread=fdread@entry=0x7f5250000a98, fdwrite=fdwrite@entry=0x7f5250000d28, fdexcept=fdexcept@entry=0x7f5250000fb8, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f5277d46cd2 in select (timeout=0x0, exceptfds=0x7f5250000fb8, writefds=0x7f5250000d28, readfds=0x7f5250000a98, nfds=<optimized out>, this=0x7f52500008e0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f5250000900, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f5277d47275 in QEventDispatcherUNIX::processEvents (this=0x7f52500008e0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f5277cee3e2 in QEventLoop::exec (this=this@entry=0x7f525a03dda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5277aadb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f5271960f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f5277ab2b0e in QThreadPrivate::start (arg=0x121bed0) at thread/qthread_unix.cpp:337
#9  0x00007f5270b2d6aa in start_thread (arg=0x7f525a03e700) at pthread_create.c:333
#10 0x00007f5279504eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f524bfff700 (LWP 1523)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f52768b7644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f52768b7689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f5270b2d6aa in start_thread (arg=0x7f524bfff700) at pthread_create.c:333
#4  0x00007f5279504eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5279a2e800 (LWP 1464)):
[KCrash Handler]
#6  KWin::ContrastEffect::uploadRegion (this=this@entry=0x1211400, map=@0x7ffeafaa6398: 0x7f5258ad8070, region=...) at ../../effects/backgroundcontrast/contrast.cpp:219
#7  0x00007f5276e6b6c5 in KWin::ContrastEffect::uploadGeometry (this=this@entry=0x1211400, vbo=vbo@entry=0x1117450, region=...) at ../../effects/backgroundcontrast/contrast.cpp:235
#8  0x00007f5276e6c04e in KWin::ContrastEffect::doContrast (this=this@entry=0x1211400, shape=..., screen=..., opacity=3.94778981e-05) at ../../effects/backgroundcontrast/contrast.cpp:361
#9  0x00007f5276e6c560 in KWin::ContrastEffect::drawWindow (this=this@entry=0x1211400, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../effects/backgroundcontrast/contrast.cpp:340
#10 0x00007f52790e40d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:470
#11 0x00007f5276de22db in KWin::BlurEffect::drawWindow (this=this@entry=0x1139ae0, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../effects/blur/blur.cpp:415
#12 0x00007f52790e40d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:470
#13 0x00007f52772be7c1 in KWin::Effect::drawWindow (this=this@entry=0x1211240, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:580
#14 0x00007f52790e40d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:470
#15 0x00007f52790ad841 in KWin::Scene::finalPaintWindow (this=<optimized out>, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../scene.cpp:605
#16 0x00007f52790e3f7a in KWin::EffectsHandlerImpl::paintWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:436
#17 0x00007f5276e5a2b7 in KWin::KscreenEffect::paintWindow (this=this@entry=0x11d95b0, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../effects/kscreen/kscreen.cpp:116
#18 0x00007f52790e3f21 in KWin::EffectsHandlerImpl::paintWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:433
#19 0x00007f52772be651 in KWin::Effect::paintWindow (this=this@entry=0x1211400, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:550
#20 0x00007f52790e3f21 in KWin::EffectsHandlerImpl::paintWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:433
#21 0x00007f52772be651 in KWin::Effect::paintWindow (this=this@entry=0x1139ae0, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:550
#22 0x00007f52790e3f21 in KWin::EffectsHandlerImpl::paintWindow (this=0x114f390, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:433
#23 0x00007f52772cc937 in KWin::AnimationEffect::paintWindow (this=this@entry=0x1211240, w=w@entry=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../../libkwineffects/kwinanimationeffect.cpp:585
#24 0x00007f52790e3f21 in KWin::EffectsHandlerImpl::paintWindow (this=0x114f390, w=0xfa4900, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:433
#25 0x00007f52790b1ee8 in KWin::Scene::paintWindow (this=this@entry=0x10ae5d0, w=0xfa4a00, mask=2, region=..., quads=...) at ../scene.cpp:477
#26 0x00007f52790afc0e in KWin::Scene::paintSimpleScreen (this=this@entry=0x10ae5d0, orig_mask=orig_mask@entry=0, region=...) at ../scene.cpp:380
#27 0x00007f52790c0513 in KWin::SceneOpenGL2::paintSimpleScreen (this=this@entry=0x10ae5d0, mask=mask@entry=0, region=...) at ../scene_opengl.cpp:1005
#28 0x00007f52790ad205 in KWin::Scene::finalPaintScreen (this=0x10ae5d0, mask=mask@entry=0, region=..., data=...) at ../scene.cpp:199
#29 0x00007f52790e3cff in KWin::EffectsHandlerImpl::paintScreen (this=0x114f390, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:393
#30 0x00007f52772be57f in KWin::Effect::paintScreen (this=this@entry=0x11d95b0, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#31 0x00007f52790e3cad in KWin::EffectsHandlerImpl::paintScreen (this=0x114f390, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:390
#32 0x00007f52772be57f in KWin::Effect::paintScreen (this=this@entry=0x1211400, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#33 0x00007f52790e3cad in KWin::EffectsHandlerImpl::paintScreen (this=0x114f390, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:390
#34 0x00007f52772be57f in KWin::Effect::paintScreen (this=this@entry=0x1139ae0, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#35 0x00007f52790e3cad in KWin::EffectsHandlerImpl::paintScreen (this=0x114f390, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:390
#36 0x00007f52772be57f in KWin::Effect::paintScreen (this=this@entry=0x1211240, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#37 0x00007f52790e3cad in KWin::EffectsHandlerImpl::paintScreen (this=0x114f390, mask=0, region=..., data=...) at ../effects.cpp:390
#38 0x00007f52790ace6a in KWin::Scene::paintScreen (this=this@entry=0x10ae5d0, mask=mask@entry=0x7ffeafaa72ac, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7ffeafaa72c0, validRegion=validRegion@entry=0x7ffeafaa72d0) at ../scene.cpp:149
#39 0x00007f52790c6da7 in KWin::SceneOpenGL::paint (this=0x10ae5d0, damage=..., toplevels=...) at ../scene_opengl.cpp:651
#40 0x00007f52790a6973 in KWin::Compositor::performCompositing (this=0x10adce0) at ../composite.cpp:658
#41 0x00007f5277d226f3 in QObject::event (this=0x10adce0, e=<optimized out>) at kernel/qobject.cpp:1267
#42 0x00007f52785fab2c in QApplicationPrivate::notify_helper (this=0xf76ae0, receiver=0x10adce0, e=0x7ffeafaa76e0) at kernel/qapplication.cpp:3720
#43 0x00007f5278600000 in QApplication::notify (this=0x7ffeafaa7920, receiver=0x10adce0, e=0x7ffeafaa76e0) at kernel/qapplication.cpp:3503
#44 0x00007f5277cf0c2b in QCoreApplication::notifyInternal (this=0x7ffeafaa7920, receiver=0x10adce0, event=event@entry=0x7ffeafaa76e0) at kernel/qcoreapplication.cpp:935
#45 0x00007f5277d48ae5 in sendEvent (event=0x7ffeafaa76e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#46 QTimerInfoList::activateTimers (this=0xfbe288) at kernel/qtimerinfo_unix.cpp:635
#47 0x00007f5277d466a0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0xfc0790) at kernel/qeventdispatcher_unix.cpp:549
#48 0x00007f5277d47243 in QEventDispatcherUNIX::processEvents (this=0xfc0790, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#49 0x00007f5262e6596d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#50 0x00007f5277cee3e2 in QEventLoop::exec (this=this@entry=0x7ffeafaa7840, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#51 0x00007f5277cf602c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#52 0x00007f527803531c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#53 0x00007f52785f67a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#54 0x00007f52797cc8c3 in kdemain (argc=1, argv=0x7ffeafaa7a78) at ../main_x11.cpp:294
#55 0x00007f527941ea40 in __libc_start_main (main=0x400790 <main(int, char**)>, argc=3, argv=0x7ffeafaa7a78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffeafaa7a68) at libc-start.c:289
#56 0x00000000004007c9 in _start ()

Reported using DrKonqi