https://bugs.kde.org/show_bug.cgi?id=374280

            Bug ID: 374280
           Summary: Unresponsive widgets and subsequent plasma crash
           Product: plasmashell
           Version: 5.5.5
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected]
  Target Milestone: 1.0

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-57-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to add and set up the widgets with the "add panels" menu

- Unusual behavior I noticed:
This PC has a fresh install of Kubuntu, so this is the first time I use plasma
5. 
At every reboot the widget customization disappears. You can drag a widget for
about 2 sec. then it freezes in a random position on the screen and it does not
move/resize/setup anymore. In order I experienced a kcontact manager crash,
nepomunk and then this.

This behaviour does not affect any other functionality (players, editors or
other programs), just the window manager.

- Custom settings of the application:
I did not change any .config file

Distributor ID: Ubuntu
Description:    Ubuntu 16.04.1 LTS
Release:        16.04
Codename:       xenial

KDE plasma 5.5.5
QT version 5.5.1
Kernel 4.4.0-57-generic
64 bit

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5ec62418c0 (LWP 1370))]

Thread 9 (Thread 0x7f5e07bfa700 (LWP 1636)):
#0  0x00007f5ec0948b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5ebd6de39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ebd6de4ac in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ec12757eb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5ec121cb4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5ec1039834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5dfcf857d7 in KCupsConnection::run() () from
/usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f5ec103e7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5ec012b6ba in start_thread (arg=0x7f5e07bfa700) at
pthread_create.c:333
#9  0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5e908e5700 (LWP 1493)):
#0  0x00007f5ec0948b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5ebd6de39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ebd6de4ac in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ec12757eb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5ec121cb4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5ec1039834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5ec4267ed6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f5ec103e7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5ec012b6ba in start_thread (arg=0x7f5e908e5700) at
pthread_create.c:333
#9  0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f5e93fff700 (LWP 1445)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5ec5c86bd4 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f5ec5c86c19 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f5ec012b6ba in start_thread (arg=0x7f5e93fff700) at
pthread_create.c:333
#4  0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5e99b24700 (LWP 1400)):
#0  _dl_update_slotinfo (req_modid=1) at dl-tls.c:639
#1  0x00007f5ec61ffaac in update_get_addr (ti=0x7f5ec1469788) at dl-tls.c:802
#2  0x00007f5ec103d702 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f5ec1275031 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5ebd6dddd1 in g_main_context_check () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5ebd6de340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f5ebd6de4ac in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f5ec12757eb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5ec121cb4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f5ec1039834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f5ec38e13c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f5ec103e7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f5ec012b6ba in start_thread (arg=0x7f5e99b24700) at
pthread_create.c:333
#13 0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5e9b9a1700 (LWP 1399)):
#0  0x00007f5ebd722ae4 in g_mutex_unlock () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5ebd6de391 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ebd6de4ac in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ec12757eb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5ec121cb4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5ec1039834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5ec38e13c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f5ec103e7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5ec012b6ba in start_thread (arg=0x7f5e9b9a1700) at
pthread_create.c:333
#9  0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f5ea0277700 (LWP 1395)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5ea397b213 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f5ea397a937 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f5ec012b6ba in start_thread (arg=0x7f5ea0277700) at
pthread_create.c:333
#4  0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f5eaab46700 (LWP 1379)):
#0  0x00007f5ebd7226a0 in g_private_get () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5ebd705070 in g_thread_self () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ebd6dd31c in g_main_context_acquire () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ebd6de255 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5ebd6de4ac in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5ec12757eb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5ec121cb4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5ec1039834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5ec38e13c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f5ec103e7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f5ec012b6ba in start_thread (arg=0x7f5eaab46700) at
pthread_create.c:333
#11 0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f5eb1580700 (LWP 1376)):
#0  0x00007f5ec0948b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5ec4a0dc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f5ec4a0f8d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5eb36ce629 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f5ec103e7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5ec012b6ba in start_thread (arg=0x7f5eb1580700) at
pthread_create.c:333
#6  0x00007f5ec095482d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5ec62418c0 (LWP 1370)):
[KCrash Handler]
#6  0x00007f5e925af778 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kquickcontrolsaddons/libkquickcontrolsaddonsplugin.so
#7  0x00007f5ec124dbaf in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5ec4304ece in QQuickWindowPrivate::renderSceneGraph(QSize const&)
() from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f5ec42d519b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f5ec42d62a1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f5ec1d2205c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f5ec1d27516 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f5ec121f38b in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f5ec12745ed in QTimerInfoList::activateTimers() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f5ec1274af1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f5ebd6de1a7 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f5ebd6de400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f5ebd6de4ac in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f5ec12757cf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f5ec121cb4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f5ec1224bec in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x0000000000432d4a in main ()

Possible duplicates by query: bug 374274, bug 374261, bug 373680, bug 373560,
bug 373307.

Reported using DrKonqi

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