Bug 302450

Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.3 (4.8.3)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-26-generic i686
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I had just started up for the day, logged in and the desktop was in the process of loading - as it did so, the kmix icon briefly appeared in the bottom toolbar, and plasma-desktop promptly crashed to a black screen with the kcrash warning, and automatically restarted directly afterwards. As a result, I did not try to reproduce this, but will note alongside this bug if it occurs again.


- Unusual behavior I noticed:

After kmix had loaded, the desktop appeared very slow, icons taking a while to preview, things seemed to be running in slow motion.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb76ce740 (LWP 1461))]

Thread 4 (Thread 0xaf6b8b40 (LWP 1634)):
#0  0x001c8416 in __kernel_vsyscall ()
#1  0x00d28380 in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x01e45a7b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x01e380ae in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x01e38201 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x022828e7 in QEventDispatcherGlib::processEvents (this=0xaed00468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x0224e50d in QEventLoop::processEvents (this=0xaf6b8240, flags=...) at kernel/qeventloop.cpp:149
#7  0x0224e7a9 in QEventLoop::exec (this=0xaf6b8240, flags=...) at kernel/qeventloop.cpp:204
#8  0x0213794c in QThread::exec (this=0x9adcbb8) at thread/qthread.cpp:501
#9  0x0222bb5d in QInotifyFileSystemWatcherEngine::run (this=0x9adcbb8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x0213ade0 in QThreadPrivate::start (arg=0x9adcbb8) at thread/qthread_unix.cpp:298
#11 0x01ddcd4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x00d36ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 3 (Thread 0xaecffb40 (LWP 1637)):
#0  0x001c8416 in __kernel_vsyscall ()
#1  0x00d2617b in read () from /lib/i386-linux-gnu/libc.so.6
#2  0x01e766ae in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x01e37bd2 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x01e38042 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x01e38201 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0x022828e7 in QEventDispatcherGlib::processEvents (this=0x9cc1760, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x0224e50d in QEventLoop::processEvents (this=0xaecff240, flags=...) at kernel/qeventloop.cpp:149
#8  0x0224e7a9 in QEventLoop::exec (this=0xaecff240, flags=...) at kernel/qeventloop.cpp:204
#9  0x0213794c in QThread::exec (this=0x9c48588) at thread/qthread.cpp:501
#10 0x0222bb5d in QInotifyFileSystemWatcherEngine::run (this=0x9c48588) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x0213ade0 in QThreadPrivate::start (arg=0x9c48588) at thread/qthread_unix.cpp:298
#12 0x01ddcd4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0x00d36ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xae4feb40 (LWP 1638)):
#0  0x001c8416 in __kernel_vsyscall ()
#1  0x01de096b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x00d443dc in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x0154d029 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0x0154d06f in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0x01ddcd4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x00d36ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb76ce740 (LWP 1461)):
[KCrash Handler]
#7  Plasma::Service::operationDescription (this=0xa161e30, operationName=...) at ../../plasma/service.cpp:182
#8  0x04d0a747 in SystemTray::DBusSystemTrayWidget::wheelEvent (this=0xa1f0110, event=0xbfbbb558) at ../../../../../plasma/generic/applets/systemtray/protocols/dbussystemtray/dbussystemtraywidget.cpp:90
#9  0x060d8910 in QGraphicsItem::sceneEvent (this=0xa1f0118, event=0xbfbbb558) at graphicsview/qgraphicsitem.cpp:6747
#10 0x06136196 in QGraphicsWidget::sceneEvent (this=0xa1f0110, event=0xbfbbb558) at graphicsview/qgraphicswidget.cpp:1229
#11 0x0610230e in sendEvent (event=0xbfbbb558, item=0xa1f0118, this=<optimized out>) at graphicsview/qgraphicsscene.cpp:1221
#12 QGraphicsScenePrivate::sendEvent (this=0x94735d8, item=0xa1f0118, event=0xbfbbb558) at graphicsview/qgraphicsscene.cpp:1197
#13 0x06107792 in QGraphicsScene::wheelEvent (this=0x9473430, wheelEvent=0xbfbbb558) at graphicsview/qgraphicsscene.cpp:4223
#14 0x06112244 in QGraphicsScene::event (this=0x9473430, event=0xbfbbb558) at graphicsview/qgraphicsscene.cpp:3464
#15 0x05a55ed4 in notify_helper (e=0xbfbbb558, receiver=0x9473430, this=0x9474090) at kernel/qapplication.cpp:4559
#16 QApplicationPrivate::notify_helper (this=0x9474090, receiver=0x9473430, e=0xbfbbb558) at kernel/qapplication.cpp:4531
#17 0x05a5b30d in QApplication::notify (this=0xbfbbb558, receiver=0x9473430, e=0xbfbbb558) at kernel/qapplication.cpp:4288
#18 0x01182b61 in KApplication::notify (this=0x94608e0, receiver=0x9473430, event=0xbfbbb558) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x0224f97e in QCoreApplication::notifyInternal (this=0x94608e0, receiver=0x9473430, event=0xbfbbb558) at kernel/qcoreapplication.cpp:876
#20 0x0612a3d4 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#21 QGraphicsView::wheelEvent (this=0x9e1f4c0, event=0xbfbbbbe4) at graphicsview/qgraphicsview.cpp:3376
#22 0x05ab087f in QWidget::event (this=0x9e1f4c0, event=0xbfbbbbe4) at kernel/qwidget.cpp:8370
#23 0x05ecde45 in QFrame::event (this=0x9e1f4c0, e=0xbfbbbbe4) at widgets/qframe.cpp:557
#24 0x05f60aa1 in QAbstractScrollArea::viewportEvent (this=0x9e1f4c0, e=0xbfbbbbe4) at widgets/qabstractscrollarea.cpp:1043
#25 0x0613469c in QGraphicsView::viewportEvent (this=0x9e1f4c0, event=0xbfbbbbe4) at graphicsview/qgraphicsview.cpp:2866
#26 0x05f631c6 in viewportEvent (this=<optimized out>, event=0xbfbbbbe4) at widgets/qabstractscrollarea_p.h:100
#27 eventFilter (e=0xbfbbbbe4, this=<optimized out>, o=<optimized out>) at widgets/qabstractscrollarea_p.h:116
#28 QAbstractScrollAreaFilter::eventFilter (this=0x98c9818, o=0x9e31948, e=0xbfbbbbe4) at widgets/qabstractscrollarea_p.h:115
#29 0x0224fb16 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x9474090, receiver=0x9e31948, event=0xbfbbbbe4) at kernel/qcoreapplication.cpp:986
#30 0x05a55ea2 in notify_helper (e=0xbfbbbbe4, receiver=0x9e31948, this=0x9474090) at kernel/qapplication.cpp:4555
#31 QApplicationPrivate::notify_helper (this=0x9474090, receiver=0x9e31948, e=0xbfbbbbe4) at kernel/qapplication.cpp:4531
#32 0x05a5baaf in QApplication::notify (this=0x9e31948, receiver=0x9e31948, e=0xbfbbbbe4) at kernel/qapplication.cpp:4157
#33 0x01182b61 in KApplication::notify (this=0x94608e0, receiver=0x9e31948, event=0xbfbbbbe4) at ../../kdeui/kernel/kapplication.cpp:311
#34 0x0224f97e in QCoreApplication::notifyInternal (this=0x94608e0, receiver=0x9e31948, event=0xbfbbbbe4) at kernel/qcoreapplication.cpp:876
#35 0x05acf0ee in sendSpontaneousEvent (event=0xbfbbbbe4, receiver=0x9e31948) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#36 QETWidget::translateWheelEvent (this=0x9e1f4c0, global_x=52, global_y=746, delta=120, buttons=..., modifiers=..., orient=Qt::Vertical) at kernel/qapplication_x11.cpp:4655
#37 0x05ae32f6 in QETWidget::translateMouseEvent (this=0x9e1f4c0, event=0xbfbbc16c) at kernel/qapplication_x11.cpp:4432
#38 0x05ae1c0d in QApplication::x11ProcessEvent (this=0x94608e0, event=0xbfbbc16c) at kernel/qapplication_x11.cpp:3732
#39 0x05b0eeac in x11EventSourceDispatch (s=0x9474540, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#40 0x01e37d86 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#41 0x01e38125 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#42 0x01e38201 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#43 0x02282887 in QEventDispatcherGlib::processEvents (this=0x9418ea0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#44 0x05b0eaaa in QGuiEventDispatcherGlib::processEvents (this=0x9418ea0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#45 0x0224e50d in QEventLoop::processEvents (this=0xbfbbc464, flags=...) at kernel/qeventloop.cpp:149
#46 0x0224e7a9 in QEventLoop::exec (this=0xbfbbc464, flags=...) at kernel/qeventloop.cpp:204
#47 0x02253eba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#48 0x05a53a74 in QApplication::exec () at kernel/qapplication.cpp:3820
#49 0x0025ca7b in kdemain (argc=1, argv=0xbfbbc664) at ../../../../plasma/desktop/shell/main.cpp:120
#50 0x0804850b in main (argc=1, argv=0xbfbbc664) at plasma-desktop_dummy.cpp:3

Reported using DrKonqi