Application: kwin_x11 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-28-generic x86_64
Distribution: Ubuntu 15.04

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

scrolling webpage inside chromium, page & window frame rending going insanely broken then "plasma" crashed

- Unusual behavior I noticed:

chromium's page rendering broken

windows frame rendering broken

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 0x7f0d0c274800 (LWP 2124))]

Thread 5 (Thread 0x7f0ceeb6b700 (LWP 2163)):
#0  0x00007f0d0bd3f743 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0d0a589101 in qt_safe_select (nfds=18, fdread=fdread@entry=0x7f0ce4000a78, fdwrite=fdwrite@entry=0x7f0ce4000d08, fdexcept=fdexcept@entry=0x7f0ce4000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f0d0a58acd2 in select (timeout=0x0, exceptfds=0x7f0ce4000f98, writefds=0x7f0ce4000d08, readfds=0x7f0ce4000a78, nfds=<optimized out>, this=0x7f0ce40008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f0ce40008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f0d0a58b275 in QEventDispatcherUNIX::processEvents (this=0x7f0ce40008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f0d0a5323e2 in QEventLoop::exec (this=this@entry=0x7f0ceeb6ada0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f0d0a2f1b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f0d041a4f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f0d0a2f6b0e in QThreadPrivate::start (arg=0x1e235c0) at thread/qthread_unix.cpp:337
#9  0x00007f0d033716aa in start_thread (arg=0x7f0ceeb6b700) at pthread_create.c:333
#10 0x00007f0d0bd48eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f0ceccb3700 (LWP 2206)):
#0  0x00007f0d0bd3f0b7 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0ced9b9919 in uki_firegl_MicroSleep () from /usr/lib/libatiuki.so.1
#2  0x00007f0cdf6f1920 in ?? () from /usr/lib/dri/fglrx_dri.so
#3  0x00007f0cdee82d72 in ?? () from /usr/lib/dri/fglrx_dri.so
#4  0x00007f0cdee82dc5 in ?? () from /usr/lib/dri/fglrx_dri.so
#5  0x00007f0d033716aa in start_thread (arg=0x7f0ceccb3700) at pthread_create.c:333
#6  0x00007f0d0bd48eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f0cd7eee700 (LWP 2215)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0d090fb644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f0d090fb689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f0d033716aa in start_thread (arg=0x7f0cd7eee700) at pthread_create.c:333
#4  0x00007f0d0bd48eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f0cdc8d4700 (LWP 2751)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0d0a2f7c6b in wait (time=18446744073709551615, this=0x27d83f0) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2992440, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f0d09382fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f0d093833a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f0d0a2f6b0e in QThreadPrivate::start (arg=0x29923c0) at thread/qthread_unix.cpp:337
#6  0x00007f0d033716aa in start_thread (arg=0x7f0cdc8d4700) at pthread_create.c:333
#7  0x00007f0d0bd48eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f0d0c274800 (LWP 2124)):
[KCrash Handler]
#6  0x00007f0cde56461f in ?? () from /usr/lib/dri/fglrx_dri.so
#7  0x00007f0cddc56049 in ?? () from /usr/lib/dri/fglrx_dri.so
#8  0x00007f0cddc562d2 in ?? () from /usr/lib/dri/fglrx_dri.so
#9  0x00007f0cde0839c3 in ?? () from /usr/lib/dri/fglrx_dri.so
#10 0x00007f0d0962581e in KWin::BlurEffect::doCachedBlur (this=0x25c3640, w=0x7f0d0273f280 <glCopyTexSubImage2D>, region=..., opacity=9.14767638e-41) at ../../effects/blur/blur.cpp:591
#11 0x00007f0d096264e1 in KWin::BlurEffect::drawWindow (this=this@entry=0x25c3640, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../../effects/blur/blur.cpp:407
#12 0x00007f0d0b9280d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x25bcd00, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:470
#13 0x00007f0d0b8f1841 in KWin::Scene::finalPaintWindow (this=<optimized out>, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../scene.cpp:605
#14 0x00007f0d0b927f7a in KWin::EffectsHandlerImpl::paintWindow (this=0x25bcd00, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:436
#15 0x00007f0d09b02651 in KWin::Effect::paintWindow (this=this@entry=0x25dcf90, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:550
#16 0x00007f0d0b927f21 in KWin::EffectsHandlerImpl::paintWindow (this=0x25bcd00, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:433
#17 0x00007f0d09b02651 in KWin::Effect::paintWindow (this=this@entry=0x25c3640, w=w@entry=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:550
#18 0x00007f0d0b927f21 in KWin::EffectsHandlerImpl::paintWindow (this=0x25bcd00, w=0x3164a20, mask=mask@entry=2, region=..., data=...) at ../effects.cpp:433
#19 0x00007f0d0b8f5ee8 in KWin::Scene::paintWindow (this=this@entry=0x2539030, w=0x3153af0, mask=2, region=..., quads=...) at ../scene.cpp:477
#20 0x00007f0d0b8f3c0e in KWin::Scene::paintSimpleScreen (this=this@entry=0x2539030, orig_mask=orig_mask@entry=0, region=...) at ../scene.cpp:380
#21 0x00007f0d0b904513 in KWin::SceneOpenGL2::paintSimpleScreen (this=this@entry=0x2539030, mask=mask@entry=0, region=...) at ../scene_opengl.cpp:1005
#22 0x00007f0d0b8f1205 in KWin::Scene::finalPaintScreen (this=0x2539030, mask=mask@entry=0, region=..., data=...) at ../scene.cpp:199
#23 0x00007f0d0b927cff in KWin::EffectsHandlerImpl::paintScreen (this=0x25bcd00, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:393
#24 0x00007f0d09b0257f in KWin::Effect::paintScreen (this=this@entry=0x25dcf90, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#25 0x00007f0d0b927cad in KWin::EffectsHandlerImpl::paintScreen (this=0x25bcd00, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:390
#26 0x00007f0d09b0257f in KWin::Effect::paintScreen (this=this@entry=0x25c3640, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#27 0x00007f0d0b927cad in KWin::EffectsHandlerImpl::paintScreen (this=0x25bcd00, mask=0, region=..., data=...) at ../effects.cpp:390
#28 0x00007f0d0b8f0e6a in KWin::Scene::paintScreen (this=this@entry=0x2539030, mask=mask@entry=0x7fffb72e745c, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fffb72e7470, validRegion=validRegion@entry=0x7fffb72e7480) at ../scene.cpp:149
#29 0x00007f0d0b90ada7 in KWin::SceneOpenGL::paint (this=0x2539030, damage=..., toplevels=...) at ../scene_opengl.cpp:651
#30 0x00007f0d0b8ea973 in KWin::Compositor::performCompositing (this=0x1dd3170) at ../composite.cpp:658
#31 0x00007f0d0a5666f3 in QObject::event (this=0x1dd3170, e=<optimized out>) at kernel/qobject.cpp:1267
#32 0x00007f0d0ae3eb2c in QApplicationPrivate::notify_helper (this=0x1cf1520, receiver=0x1dd3170, e=0x7fffb72e7890) at kernel/qapplication.cpp:3720
#33 0x00007f0d0ae44000 in QApplication::notify (this=0x7fffb72e7ad0, receiver=0x1dd3170, e=0x7fffb72e7890) at kernel/qapplication.cpp:3503
#34 0x00007f0d0a534c2b in QCoreApplication::notifyInternal (this=0x7fffb72e7ad0, receiver=0x1dd3170, event=event@entry=0x7fffb72e7890) at kernel/qcoreapplication.cpp:935
#35 0x00007f0d0a58cae5 in sendEvent (event=0x7fffb72e7890, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#36 QTimerInfoList::activateTimers (this=0x1d260f8) at kernel/qtimerinfo_unix.cpp:635
#37 0x00007f0d0a58a6a0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1d224b0) at kernel/qeventdispatcher_unix.cpp:549
#38 0x00007f0d0a58b243 in QEventDispatcherUNIX::processEvents (this=0x1d224b0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#39 0x00007f0cf834396d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#40 0x00007f0d0a5323e2 in QEventLoop::exec (this=this@entry=0x7fffb72e79f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#41 0x00007f0d0a53a02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#42 0x00007f0d0a87931c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#43 0x00007f0d0ae3a7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#44 0x00007f0d0c0108c3 in kdemain (argc=1, argv=0x7fffb72e7c28) at ../main_x11.cpp:294
#45 0x00007f0d0bc62a40 in __libc_start_main (main=0x400790 <main(int, char**)>, argc=3, argv=0x7fffb72e7c28, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb72e7c18) at libc-start.c:289
#46 0x00000000004007c9 in _start ()

Reported using DrKonqi