Bug 363125

Application: plasmashell (5.6.4)

Qt Version: 5.6.0
Frameworks Version: 5.22.0
Operating System: Linux 4.5.3-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

-- Information about the crash:
- What I was doing when the application crashed:
The screen went to standby for several minutes. Plasma was crashed when I returned to the computer.

- Unusual behavior I noticed:
The lock screen was half transparent, showing the windows "behind" it. Soon (seconds) after reactivating the screen from standby, this effect vanished and the lock screen became opaque again. I assume this was when Plasma crashed.

This is likely a duplicate of bug #361548, but DrKonqi is broken and does not allow me to mark it as such (bug #355807).

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8ae8b33840 (LWP 7156))]

Thread 10 (Thread 0x7f8ad3665700 (LWP 7158)):
#0  0x00007f8ae36c301d in poll () from /lib64/libc.so.6
#1  0x00007f8ae7758a72 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007f8ae775a627 in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f8ad4d90169 in QXcbEventReader::run (this=0x264a380) at qxcbconnection.cpp:1313
#4  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x264a380) at thread/qthread_unix.cpp:340
#5  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f8ad1de5700 (LWP 7159)):
#0  0x00007f8ae08b1e61 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f8ae086ed43 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f8ae086f290 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f8ae400511b in QEventDispatcherGlib::processEvents (this=0x7f8ac40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7f8ad1de4d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f8ae3e1dba4 in QThread::exec (this=this@entry=0x7f8ae913c900 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:503
#7  0x00007f8ae90cb335 in QDBusConnectionManager::run (this=0x7f8ae913c900 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:181
#8  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x7f8ae913c900 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:340
#9  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#10 0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f8acbfff700 (LWP 7162)):
#0  0x00007f8ae08b1e61 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f8ae086e8c8 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f8ae086f21b in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f8ae400511b in QEventDispatcherGlib::processEvents (this=0x7f8ac00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7f8acbffed60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f8ae3e1dba4 in QThread::exec (this=this@entry=0x27415f0) at thread/qthread.cpp:503
#7  0x00007f8ae660d6e5 in QQmlThreadPrivate::run (this=0x27415f0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x27415f0) at thread/qthread_unix.cpp:340
#9  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#10 0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f8ab124d700 (LWP 7213)):
#0  0x00007f8ae2ed2eef in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f8ac9a50b73 in cnd_wait (mtx=0x284bc90, cond=0x284bcb8) at /var/tmp/portage/media-libs/mesa-11.2.2/work/mesa-11.2.2/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x284bc90) at /var/tmp/portage/media-libs/mesa-11.2.2/work/mesa-11.2.2/src/gallium/auxiliary/os/os_thread.h:259
#3  radeon_drm_cs_emit_ioctl (param=param@entry=0x284b860) at /var/tmp/portage/media-libs/mesa-11.2.2/work/mesa-11.2.2/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c:688
#4  0x00007f8ac9a502c7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.2.2/work/mesa-11.2.2/include/c11/threads_posix.h:87
#5  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f8aacbc5700 (LWP 7238)):
#0  0x00007f8ae086f2a9 in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f8ae400511b in QEventDispatcherGlib::processEvents (this=0x7f8aa80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#3  0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7f8aacbc4d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f8ae3e1dba4 in QThread::exec (this=this@entry=0x2bbe6a0) at thread/qthread.cpp:503
#5  0x00007f8ae660d6e5 in QQmlThreadPrivate::run (this=0x2bbe6a0) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x2bbe6a0) at thread/qthread_unix.cpp:340
#7  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#8  0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f8aa7205700 (LWP 7240)):
#0  0x00007f8ae36c301d in poll () from /lib64/libc.so.6
#1  0x00007f8ae086f2ec in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f8ae400511b in QEventDispatcherGlib::processEvents (this=0x7f8aa00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7f8aa7204d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f8ae3e1dba4 in QThread::exec (this=this@entry=0x2cb7b00) at thread/qthread.cpp:503
#6  0x00007f8ae660d6e5 in QQmlThreadPrivate::run (this=0x2cb7b00) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x2cb7b00) at thread/qthread_unix.cpp:340
#8  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#9  0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f8aa59b5700 (LWP 7259)):
#0  0x00007f8ae2ed2eef in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f8ae8a276b4 in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007f8ae8a276f9 in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#4  0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f8a1ed35700 (LWP 7264)):
#0  0x00007f8ae08b1e7c in g_mutex_unlock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f8ae086f19d in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f8ae400511b in QEventDispatcherGlib::processEvents (this=0x7f8a180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7f8a1ed34d10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f8ae3e1dba4 in QThread::exec (this=this@entry=0x2f220c0) at thread/qthread.cpp:503
#6  0x00007f8ae6f93836 in QQuickPixmapReader::run (this=0x2f220c0) at util/qquickpixmapcache.cpp:818
#7  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x2f220c0) at thread/qthread_unix.cpp:340
#8  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#9  0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f8a0f805700 (LWP 7357)):
#0  0x00007f8ae08b1e7c in g_mutex_unlock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f8ae086e8af in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f8ae086f21b in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f8ae400511b in QEventDispatcherGlib::processEvents (this=0x7f8a080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7f8a0f804d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f8ae3e1dba4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f8a10afff1f in KCupsConnection::run() () from /usr/lib64/libkcupslib.so
#8  0x00007f8ae3e21f3b in QThreadPrivate::start (arg=0x40318b0) at thread/qthread_unix.cpp:340
#9  0x00007f8ae2ecd3fc in start_thread () from /lib64/libpthread.so.0
#10 0x00007f8ae36cbead in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f8ae8b33840 (LWP 7156)):
[KCrash Handler]
#6  Plasma::Applet::actions (this=this@entry=0x0) at /var/tmp/portage/kde-frameworks/plasma-5.21.0/work/plasma-framework-5.21.0/src/plasma/applet.cpp:611
#7  0x000000000043e9fe in ShellCorona::addOutput (this=this@entry=0x2708200, output=...) at /var/tmp/portage/kde-plasma/plasma-workspace-5.6.4/work/plasma-workspace-5.6.4/shell/shellcorona.cpp:909
#8  0x000000000043eb8f in ShellCorona::outputEnabledChanged (this=0x2708200) at /var/tmp/portage/kde-plasma/plasma-workspace-5.6.4/work/plasma-workspace-5.6.4/shell/shellcorona.cpp:802
#9  0x00007f8ae3fdf23d in QtPrivate::QSlotObjectBase::call (a=0x7ffd950546a0, r=0x2708200, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#10 QMetaObject::activate (sender=0x2be76d0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3715
#11 0x00007f8ae8179228 in KScreen::Output::apply (this=0x2be76d0, other=...) at /var/tmp/portage/kde-plasma/libkscreen-5.6.4/work/libkscreen-5.6.4/src/output.cpp:515
#12 0x00007f8ae815ef0e in KScreen::Config::apply (this=this@entry=0x2a21290, other=...) at /var/tmp/portage/kde-plasma/libkscreen-5.6.4/work/libkscreen-5.6.4/src/config.cpp:346
#13 0x00007f8ae816aac1 in KScreen::ConfigMonitor::Private::updateConfigs (this=this@entry=0x2e5f9e0, newConfig=...) at /var/tmp/portage/kde-plasma/libkscreen-5.6.4/work/libkscreen-5.6.4/src/configmonitor.cpp:179
#14 0x00007f8ae816c493 in KScreen::ConfigMonitor::Private::edidReady (this=0x2e5f9e0, watcher=<optimized out>) at /var/tmp/portage/kde-plasma/libkscreen-5.6.4/work/libkscreen-5.6.4/src/configmonitor.cpp:163
#15 0x00007f8ae3fdf23d in QtPrivate::QSlotObjectBase::call (a=0x7ffd95054ac0, r=0x2e5f9e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#16 QMetaObject::activate (sender=0x5044ca0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd95054ac0) at kernel/qobject.cpp:3715
#17 0x00007f8ae3fdf7e7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f8ae913c1a0 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd95054ac0) at kernel/qobject.cpp:3595
#18 0x00007f8ae911fd3f in QDBusPendingCallWatcher::finished (this=<optimized out>, _t1=0x5044ca0) at .moc/moc_qdbuspendingcall.cpp:152
#19 0x00007f8ae911fe38 in QDBusPendingCallWatcherPrivate::_q_finished (this=<optimized out>) at qdbuspendingcall.cpp:488
#20 QDBusPendingCallWatcher::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qdbuspendingcall.cpp:83
#21 0x00007f8ae3fdffd1 in QObject::event (this=0x5044ca0, e=<optimized out>) at kernel/qobject.cpp:1256
#22 0x00007f8ae483277c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5044ca0, e=0x7f8ac4055aa0) at kernel/qapplication.cpp:3714
#23 0x00007f8ae48378ed in QApplication::notify (this=0x7ffd950551c0, receiver=0x5044ca0, e=0x7f8ac4055aa0) at kernel/qapplication.cpp:3495
#24 0x00007f8ae3fb8339 in QCoreApplication::notifyInternal2 (receiver=0x5044ca0, event=event@entry=0x7f8ac4055aa0) at kernel/qcoreapplication.cpp:1015
#25 0x00007f8ae3fba308 in QCoreApplication::sendEvent (event=0x7f8ac4055aa0, receiver=<optimized out>) at kernel/qcoreapplication.h:227
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x26355e0) at kernel/qcoreapplication.cpp:1650
#27 0x00007f8ae3fba7c8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#28 0x00007f8ae4005083 in postEventSourceDispatch (s=0x268ca40) at kernel/qeventdispatcher_glib.cpp:270
#29 0x00007f8ae086f0ee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#30 0x00007f8ae086f350 in ?? () from /usr/lib64/libglib-2.0.so.0
#31 0x00007f8ae086f3fc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#32 0x00007f8ae40050f7 in QEventDispatcherGlib::processEvents (this=0x26860b0, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#33 0x00007f8ae3fb722a in QEventLoop::exec (this=this@entry=0x7ffd95055070, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#34 0x00007f8ae3fbeb44 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#35 0x00007f8ae42e70ac in QGuiApplication::exec () at kernel/qguiapplication.cpp:1598
#36 0x00007f8ae482f8d5 in QApplication::exec () at kernel/qapplication.cpp:2973
#37 0x000000000041b9a6 in main (argc=2, argv=<optimized out>) at /var/tmp/portage/kde-plasma/plasma-workspace-5.6.4/work/plasma-workspace-5.6.4/shell/main.cpp:139

Possible duplicates by query: bug 362745, bug 362635, bug 362552, bug 362348, bug 362259.

Reported using DrKonqi