Bug 344087

Summary: Kscreen crashes/segfaults after unifying/deunifying outputs
Product: [Plasma] KScreen Reporter: J Brauchle <joschi.brauchle>
Component: kcmAssignee: Daniel Vrátil <dvratil>
Status: RESOLVED UNMAINTAINED    
Severity: crash CC: johnoshaugh, sebas, simonandric5
Priority: NOR Keywords: drkonqi
Version First Reported In: 1.0.5   
Target Milestone: ---   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description J Brauchle 2015-02-12 16:48:06 UTC 
Application: systemsettings (4.11.15)
KDE Platform Version: 4.14.4
Qt Version: 4.8.6
Operating System: Linux 3.19.0-1.gb47fe8e-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

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

In Kscreen I clicked
1: Unify Outputs
2: Apply
... Outputs were unified...
1: Break Unified Outputs
2: Apply
... Outputs were de-unified... Kscreen segfaults.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb3b90a5800 (LWP 19762))]

Thread 2 (Thread 0x7fb399bcd700 (LWP 19763)):
#0  0x00007fb3af33505f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb3b39668cb in  () at /usr/lib64/libQtScript.so.4
#2  0x00007fb3b3966909 in  () at /usr/lib64/libQtScript.so.4
#3  0x00007fb3af3310a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fb3b60c47fd in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fb3b90a5800 (LWP 19762)):
[KCrash Handler]
#5  0x00007fb399bd8c14 in KScreen::Output::id() const () at /usr/lib64/libkscreen.so.1
#6  0x00007fb3185c7464 in  () at /usr/lib64/kde4/plugins/kscreen/KSC_XRandR.so
#7  0x00007fb399bd8319 in KScreen::ConfigMonitor::Private::updateConfigs() () at /usr/lib64/libkscreen.so.1
#8  0x00007fb399bd834d in KScreen::ConfigMonitor::notifyUpdate() () at /usr/lib64/libkscreen.so.1
#9  0x00007fb3185c4c44 in  () at /usr/lib64/kde4/plugins/kscreen/KSC_XRandR.so
#10 0x00007fb3b68261fa in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /usr/lib64/libQtCore.so.4
#11 0x00007fb3185c5f17 in  () at /usr/lib64/kde4/plugins/kscreen/KSC_XRandR.so
#12 0x00007fb3b81dbdd8 in  () at /usr/lib64/libkdeui.so.5
#13 0x00007fb3b68041ce in QAbstractEventDispatcher::filterEvent(void*) () at /usr/lib64/libQtCore.so.4
#14 0x00007fb3b753a4f0 in  () at /usr/lib64/libQtGui.so.4
#15 0x00007fb3af066a04 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#16 0x00007fb3af066c48 in  () at /usr/lib64/libglib-2.0.so.0
#17 0x00007fb3af066cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#18 0x00007fb3b683f0be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#19 0x00007fb3b753a676 in  () at /usr/lib64/libQtGui.so.4
#20 0x00007fb3b6810e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#21 0x00007fb3b6811165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#22 0x00007fb3b68165b9 in QCoreApplication::exec() () at /usr/lib64/libQtCore.so.4
#23 0x000000000040b4bb in main(int, char**) (argc=5, argv=0x7fff3362a0f8) at /usr/src/debug/kde-workspace-4.11.15/systemsettings/app/main.cpp:49

Reported using DrKonqi
Comment 1 John O'Shaughnessy 2015-11-06 05:09:43 UTC 
happens to me too, also using openSUSE... occurs exactly as reported
Comment 2 Sebastian Kügler 2016-02-02 15:13:00 UTC 
We don't maintain Plasma 4 anymore, please try Plasma 5 and let us know in case the bug persists.