Bug 348961

Summary: Plasma workspace crash on video output change
Product: [Plasma] plasmashell Reporter: Michael J Gruber <kde>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bshah, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.3.1   
Target Milestone: 1.0   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Michael J Gruber 2015-06-10 09:10:09 UTC 
Application: plasmashell (5.3.1)

Qt Version: 5.4.1
Operating System: Linux 4.0.4-202.fc21.x86_64 x86_64
Distribution: "Fedora release 21 (Twenty One)"

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

The crash happens when I attach an external monitor to my laptop while plasma workspace is running.

The configuration is known to plasma, it is saved as "laptop screen off, external monitor on". If I plug in the external monitor, the output is switched correctly (laptop screen off, external monitor on) but the workspace crash is reported.

If I plug in the external monitor before log in, the output is on both screens (boot, sdm). If I then login to the plasma environment it switches the laptop screen off correctly, without crash.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2553065900 (LWP 1949))]

Thread 31 (Thread 0x7f2535f12700 (LWP 1951)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f254f95d182 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f254f95ecff in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f2537a59959 in QXcbEventReader::run() () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#4  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#6  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 30 (Thread 0x7f252f5ef700 (LWP 1977)):
#0  0x00007f254c4c78fd in read () at /lib64/libc.so.6
#1  0x00007f2547cf9d00 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb65fc in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#11 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 29 (Thread 0x7f252cf2b700 (LWP 2000)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 28 (Thread 0x7f2525ba2700 (LWP 2009)):
#0  0x00007f2547cfb190 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6af1 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 27 (Thread 0x7f2524ad1700 (LWP 2010)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 26 (Thread 0x7f25177ff700 (LWP 2011)):
#0  0x00007f2547cfb199 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb5c28 in g_main_context_release () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6ae9 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 25 (Thread 0x7f25167fe700 (LWP 2012)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 24 (Thread 0x7f25157cd700 (LWP 2013)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 23 (Thread 0x7f2503fff700 (LWP 2014)):
#0  0x00007f254c4e4d8f in __libc_enable_asynccancel () at /lib64/libc.so.6
#1  0x00007f254c4cbc82 in poll () at /lib64/libc.so.6
#2  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 22 (Thread 0x7f2502dde700 (LWP 2016)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 21 (Thread 0x7f2501ddd700 (LWP 2017)):
#0  0x00007f2547cfb199 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb655c in g_main_context_check () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 20 (Thread 0x7f2500d7c700 (LWP 2018)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 19 (Thread 0x7f24f37ff700 (LWP 2019)):
#0  0x00007f2547cfb1b4 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb69dd in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7f24f27fe700 (LWP 2022)):
#0  0x00007f254c4c78fd in read () at /lib64/libc.so.6
#1  0x00007f2547cf9d00 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb65fc in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#11 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7f24f17fd700 (LWP 2023)):
#0  0x00007f254c1c7590 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2551e304e4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f2551e30529 in  () at /lib64/libQt5Script.so.5
#3  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#4  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7f245d287700 (LWP 2042)):
#0  0x00007f254c4c78fd in read () at /lib64/libc.so.6
#1  0x00007f2547cf9d00 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb65fc in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#11 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f245770e700 (LWP 2043)):
#0  0x00007f2547cb64a7 in g_main_context_check () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f2552d48b36 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f244e449700 (LWP 2060)):
#0  0x00007f2547cfb199 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6109 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6a5b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f244d346700 (LWP 2061)):
#0  0x00007f254c4e4dd8 in __libc_disable_asynccancel () at /lib64/libc.so.6
#1  0x00007f254c4cbc99 in poll () at /lib64/libc.so.6
#2  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f2443fff700 (LWP 2062)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f2442ffe700 (LWP 2063)):
#0  0x00007f254c4cbc8d in poll () at /lib64/libc.so.6
#1  0x00007f2547cb6b34 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f2441ffd700 (LWP 2064)):
#0  0x00007f2547cfb199 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb63ff in g_main_context_check () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f2440f3a700 (LWP 2065)):
#0  0x00007f2547cb3c84 in g_source_iter_clear () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6188 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6a5b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f242eaad700 (LWP 2265)):
#0  0x00007f254d05d1fa in QMutex::lock() () at /lib64/libQt5Core.so.5
#1  0x00007f254d2a7e5b in postEventSourcePrepare(_GSource*, int*) () at /lib64/libQt5Core.so.5
#2  0x00007f2547cb60fd in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6a5b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#11 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f242d9aa700 (LWP 2266)):
#0  0x00007f2547cb64aa in g_main_context_check () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f242c8a7700 (LWP 2267)):
#0  0x00007f254c4c78fd in read () at /lib64/libc.so.6
#1  0x00007f2547cf9d00 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb65fc in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#11 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f241b79f700 (LWP 2268)):
#0  0x00007f2547cb3baa in g_source_iter_next () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb609b in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6a5b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f241a69e700 (LWP 2269)):
#0  0x00007f254c4c78fd in read () at /lib64/libc.so.6
#1  0x00007f2547cf9d00 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb65fc in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#11 0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f241959d700 (LWP 2270)):
#0  0x00007f2547cfb1b4 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6ae9 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f24090ab700 (LWP 2327)):
#0  0x00007f2547cb63f8 in g_main_context_check () at /lib64/libglib-2.0.so.0
#1  0x00007f2547cb6ad3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f254d2a889c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f254d060374 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f254f5c8195 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f254d06514e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f254c1c252a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f254c4d722d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f2553065900 (LWP 1949)):
[KCrash Handler]
#5  0x00007f254c40b8d7 in raise () at /lib64/libc.so.6
#6  0x00007f254c40d53a in abort () at /lib64/libc.so.6
#7  0x00007f254cd13fdd in __gnu_cxx::__verbose_terminate_handler() () at /lib64/libstdc++.so.6
#8  0x00007f254cd11e56 in  () at /lib64/libstdc++.so.6
#9  0x00007f254cd11ea1 in  () at /lib64/libstdc++.so.6
#10 0x00007f254cd129ef in  () at /lib64/libstdc++.so.6
#11 0x00007f254d56e8fa in QPlatformScreen::physicalSize() const () at /lib64/libQt5Gui.so.5
#12 0x00007f254d5a7c52 in QScreen::physicalSize() const () at /lib64/libQt5Gui.so.5
#13 0x00007f254d5a7d09 in QScreen::physicalDotsPerInch() const () at /lib64/libQt5Gui.so.5
#14 0x00007f2552ecbe73 in QQuickScreenAttached::screenChanged(QScreen*) () at /lib64/libQt5Quick.so.5
#15 0x00007f254d280be9 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#16 0x00007f254d58551f in QWindow::screenChanged(QScreen*) () at /lib64/libQt5Gui.so.5
#17 0x00007f254d585d75 in QWindowPrivate::emitScreenChangedRecursion(QScreen*) () at /lib64/libQt5Gui.so.5
#18 0x00007f254d589423 in QWindowPrivate::setTopLevelScreen(QScreen*, bool) () at /lib64/libQt5Gui.so.5
#19 0x00007f254d5895b5 in QWindow::screenDestroyed(QObject*) () at /lib64/libQt5Gui.so.5
#20 0x00007f254d28057a in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#21 0x00007f254d28131f in QObject::destroyed(QObject*) () at /lib64/libQt5Core.so.5
#22 0x00007f254d289bdb in QObject::~QObject() () at /lib64/libQt5Core.so.5
#23 0x00007f254d905047 in QScreen::~QScreen() () at /lib64/libQt5Gui.so.5
#24 0x00007f254d56ee27 in QPlatformScreen::~QPlatformScreen() () at /lib64/libQt5Gui.so.5
#25 0x00007f2537a64f19 in QXcbScreen::~QXcbScreen() () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#26 0x00007f2537a57d2e in QXcbConnection::updateScreens() () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#27 0x00007f2537a58add in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#28 0x00007f2537a59d7b in QXcbConnection::processXcbEvents() () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#29 0x00007f254d28192a in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#30 0x00007f254db3c95c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#31 0x00007f254db41da0 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#32 0x00007f254d2507ab in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#33 0x00007f254d2527eb in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#34 0x00007f254d2a8493 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#35 0x00007f2547cb67fb in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#36 0x00007f2547cb6b98 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#37 0x00007f2547cb6c4c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#38 0x00007f254d2a8887 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#39 0x00007f254d24e042 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#40 0x00007f254d255aec in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#41 0x000000000042ef23 in main ()

Reported using DrKonqi
Comment 1 David Edmundson 2015-06-10 14:15:53 UTC 
Thanks.

The issue is in Qt, it's been fixed but that fix isn't released yet.

*** This bug has been marked as a duplicate of bug 348233 ***
Comment 2 David Edmundson 2015-06-10 14:16:36 UTC 
Oops, wrong number. Sorry.

*** This bug has been marked as a duplicate of bug 345544 ***