Application: kwin (4.11.8)
KDE Platform Version: 4.12.97
Qt Version: 4.8.6
Operating System: Linux 3.13.0-22-generic x86_64
Distribution: Ubuntu Trusty Tahr (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Activated composite with the newly installed kernel. Previous kernel worked.

Kernels:
prev: 3.13.0-19
now: 3.13.0-22

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f70e3841f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007f70e3845388 in __GI_abort () at abort.c:89
#8  0x00007f70e383ae36 in __assert_fail_base (fmt=0x7f70e398c718 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f70c4483a63 "brw->hw_ctx != ((void *)0)", file=file@entry=0x7f70c4483a28 "../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c", line=line@entry=43, function=function@entry=0x7f70c4483a80 <__PRETTY_FUNCTION__.35445> "brw_get_graphics_reset_status") at assert.c:92
#9  0x00007f70e383aee2 in __GI___assert_fail (assertion=assertion@entry=0x7f70c4483a63 "brw->hw_ctx != ((void *)0)", file=file@entry=0x7f70c4483a28 "../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c", line=line@entry=43, function=function@entry=0x7f70c4483a80 <__PRETTY_FUNCTION__.35445> "brw_get_graphics_reset_status") at assert.c:101
#10 0x00007f70c4352b25 in brw_get_graphics_reset_status (ctx=<optimized out>) at ../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c:43
#11 0x00007f70c40da3e0 in _mesa_GetGraphicsResetStatusARB () at ../../../../src/mesa/main/getstring.c:327
#12 0x00007f70e3cad959 in KWin::SceneOpenGL::paint (this=0x1c342b0, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:372
#13 0x00007f70e3c927f3 in KWin::Compositor::performCompositing (this=this@entry=0x17227f0) at ../../kwin/composite.cpp:618
#14 0x00007f70e3c93aef in KWin::Compositor::slotCompositingOptionsInitialized (this=0x17227f0) at ../../kwin/composite.cpp:273
#15 0x00007f70e3c1c3d5 in KWin::Compositor::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at moc_composite.cpp:193
#16 0x00007f70ddcd887a in QMetaObject::activate (sender=0x1795850, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#17 0x00007f70ddbb2b18 in QFutureWatcherBase::event (this=<optimized out>, event=0x7f70c0005f40) at concurrent/qfuturewatcher.cpp:344
#18 0x00007f70dd05de2c in QApplicationPrivate::notify_helper (this=this@entry=0x15aa2e0, receiver=receiver@entry=0x1795850, e=e@entry=0x7f70c0005f40) at kernel/qapplication.cpp:4567
#19 0x00007f70dd0644a0 in QApplication::notify (this=this@entry=0x7fffd2c79090, receiver=receiver@entry=0x1795850, e=e@entry=0x7f70c0005f40) at kernel/qapplication.cpp:4353
#20 0x00007f70e2549baa in KApplication::notify (this=0x7fffd2c79090, receiver=0x1795850, event=0x7f70c0005f40) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x00007f70ddcc44dd in QCoreApplication::notifyInternal (this=0x7fffd2c79090, receiver=receiver@entry=0x1795850, event=event@entry=0x7f70c0005f40) at kernel/qcoreapplication.cpp:953
#22 0x00007f70ddcc7b3d in sendEvent (event=0x7f70c0005f40, receiver=0x1795850) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x15531f0) at kernel/qcoreapplication.cpp:1577
#24 0x00007f70ddcf4bbf in QEventDispatcherUNIX::processEvents (this=this@entry=0x1554af0, flags=...) at kernel/qeventdispatcher_unix.cpp:908
#25 0x00007f70dd1004d6 in QEventDispatcherX11::processEvents (this=0x1554af0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#26 0x00007f70ddcc30af in QEventLoop::processEvents (this=this@entry=0x7fffd2c78f00, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f70ddcc33a5 in QEventLoop::exec (this=this@entry=0x7fffd2c78f00, flags=...) at kernel/qeventloop.cpp:204
#28 0x00007f70ddcc8b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#29 0x00007f70dd05c37c in QApplication::exec () at kernel/qapplication.cpp:3828
#30 0x00007f70e3c4c856 in kdemain (argc=1, argv=0x7fffd2c791d8) at ../../kwin/main.cpp:597
#31 0x00007f70e382cec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=1, argv=0x7fffd2c791d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd2c791c8) at libc-start.c:287
#32 0x00000000004006fe in _start ()

Possible duplicates by query: bug 332970, bug 332784, bug 330440, bug 329984, bug 328718.

Reported using DrKonqi