<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.kde.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.6"
          urlbase="https://bugs.kde.org/"
          
          maintainer="sysadmin@kde.org"
>

    <bug>
          <bug_id>421895</bug_id>
          
          <creation_ts>2020-05-22 05:18:43 +0000</creation_ts>
          <short_desc>Multi-monitor login on laptop results in primary &amp; secondary monitor confusion, Plasma then crashes in ShellCorona::screenForContainment() when external monitor is removed</short_desc>
          <delta_ts>2025-12-11 16:58:59 +0000</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>4</classification_id>
          <classification>Plasma</classification>
          <product>plasmashell</product>
          <component>generic-multiscreen</component>
          <version>5.18.5</version>
          <rep_platform>Ubuntu</rep_platform>
          <op_sys>Linux</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>DUPLICATE</resolution>
          <dup_id>513216</dup_id>
          <see_also>https://bugs.kde.org/show_bug.cgi?id=431726</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>drkonqi</keywords>
          <priority>NOR</priority>
          <bug_severity>crash</bug_severity>
          <target_milestone>1.0</target_milestone>
          
          
          <everconfirmed>0</everconfirmed>
          <reporter name="Melvin">melvin.hausmann+bugs.kde</reporter>
          <assigned_to name="Aleix Pol">aleixpol</assigned_to>
          <cc>ABeisemann</cc>
    
    <cc>bugseforuns</cc>
    
    <cc>constantine.karnacevych</cc>
    
    <cc>nate</cc>
    
    <cc>notmart</cc>
    
    <cc>plasma-bugs-null</cc>
          
          <cf_commitlink></cf_commitlink>
          <cf_versionfixedin></cf_versionfixedin>
          <cf_sentryurl></cf_sentryurl>
          <votes>0</votes>

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1931761</commentid>
    <comment_count>0</comment_count>
    <who name="Melvin">melvin.hausmann+bugs.kde</who>
    <bug_when>2020-05-22 05:18:43 +0000</bug_when>
    <thetext>Application: plasmashell (5.18.5)

Qt Version: 5.12.8
Frameworks Version: 5.68.0
Operating System: Linux 5.4.0-31-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.04 LTS

-- Information about the crash:
General Info:
Hardware System is a laptop with an nvidia optimus card (Nvidia GT 540M with the Nvidia 390 driver installed)
Internal monitor resolution is 1366*768 pixel, external is 1920*1080 pixel.
Software System is a clean install of Kubuntu 20.04 (no upgrade) using X.

- What I was doing when the application crashed:
When logging in with the external monitor connected the plasma shell displays the control bar and the background image for the primary monitor on the secondary screen (my case: the laptop screen) and the background image for the secondary screen on the primary monitor (aka the external monitor)
Then I unplug the external monitor and the plasma shell crashes, restarts and from there on behaves normally (no more crashing when de-/reattaching displays, displaying things where they should be)

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library &quot;/lib/x86_64-linux-gnu/libthread_db.so.1&quot;.
[Current thread is 1 (Thread 0x7f60e1d1f280 (LWP 1396))]

Thread 11 (Thread 0x7f60af01a700 (LWP 1943)):
#0  g_source_ref (source=0x7f60a0005070) at ../../../glib/gmain.c:2166
#1  0x00007f60e4011168 in g_source_iter_next (iter=iter@entry=0x7f60af019ba0, source=source@entry=0x7f60af019b98) at ../../../glib/gmain.c:1046
#2  0x00007f60e4012aff in g_main_context_check (context=context@entry=0x7f60a0000c30, max_priority=2147483647, fds=fds@entry=0x7f60a00029e0, n_fds=n_fds@entry=1) at ../../../glib/gmain.c:3860
#3  0x00007f60e4013152 in g_main_context_iterate (context=context@entry=0x7f60a0000c30, block=block@entry=1, dispatch=dispatch@entry=1, self=&lt;optimized out&gt;) at ../../../glib/gmain.c:4044
#4  0x00007f60e40132e3 in g_main_context_iteration (context=0x7f60a0000c30, may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#5  0x00007f60e598a583 in QEventDispatcherGlib::processEvents (this=0x7f60a0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f60e59314db in QEventLoop::exec (this=this@entry=0x7f60af019d60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f60e5769785 in QThread::exec (this=&lt;optimized out&gt;) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f60af5120bc in KCupsConnection::run() () from /lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007f60e576a9d2 in QThreadPrivate::start (arg=0x55df48666730) at thread/qthread_unix.cpp:361
#10 0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#11 0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f60b7885700 (LWP 1678)):
#0  g_source_ref (source=0x7f60b0004cb0) at ../../../glib/gmain.c:2166
#1  0x00007f60e4011168 in g_source_iter_next (iter=iter@entry=0x7f60b7884ba0, source=source@entry=0x7f60b7884b98) at ../../../glib/gmain.c:1046
#2  0x00007f60e4012aff in g_main_context_check (context=context@entry=0x7f60b0000c30, max_priority=2147483647, fds=fds@entry=0x7f60b00058f0, n_fds=n_fds@entry=1) at ../../../glib/gmain.c:3860
#3  0x00007f60e4013152 in g_main_context_iterate (context=context@entry=0x7f60b0000c30, block=block@entry=1, dispatch=dispatch@entry=1, self=&lt;optimized out&gt;) at ../../../glib/gmain.c:4044
#4  0x00007f60e40132e3 in g_main_context_iteration (context=0x7f60b0000c30, may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#5  0x00007f60e598a583 in QEventDispatcherGlib::processEvents (this=0x7f60b0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f60e59314db in QEventLoop::exec (this=this@entry=0x7f60b7884d60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f60e5769785 in QThread::exec (this=this@entry=0x7f60d400ca20) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f60e73c2e1a in QQuickPixmapReader::run (this=0x7f60d400ca20) at util/qquickpixmapcache.cpp:953
#9  0x00007f60e576a9d2 in QThreadPrivate::start (arg=0x7f60d400ca20) at thread/qthread_unix.cpp:361
#10 0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#11 0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f60d0df2700 (LWP 1663)):
#0  futex_wait_cancelable (private=&lt;optimized out&gt;, expected=0, futex_word=0x55df45641b10) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55df45641ac0, cond=0x55df45641ae8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55df45641ae8, mutex=0x55df45641ac0) at pthread_cond_wait.c:638
#3  0x00007f60e5770b0f in QWaitConditionPrivate::wait (deadline=..., this=0x55df45641ac0) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=&lt;optimized out&gt;, mutex=0x55df4563a6d0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f60e5770c01 in QWaitCondition::wait (this=this@entry=0x55df4563a6d8, mutex=mutex@entry=0x55df4563a6d0, time=time@entry=18446744073709551615) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#6  0x00007f60e744f109 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55df4563a6c8) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55df4563a650) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f60e744f3ad in QSGRenderThread::run (this=0x55df4563a650) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f60e576a9d2 in QThreadPrivate::start (arg=0x55df4563a650) at thread/qthread_unix.cpp:361
#10 0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#11 0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f60d27fc700 (LWP 1563)):
#0  futex_wait_cancelable (private=&lt;optimized out&gt;, expected=0, futex_word=0x55df44f7e898) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55df44f7e848, cond=0x55df44f7e870) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55df44f7e870, mutex=0x55df44f7e848) at pthread_cond_wait.c:638
#3  0x00007f60d8f2c35b in cnd_wait (mtx=0x55df44f7e848, cond=0x55df44f7e870) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x55df4525e0e0) at ../src/util/u_queue.c:275
#5  0x00007f60d8f2bf6b in impl_thrd_routine (p=&lt;optimized out&gt;) at ../include/c11/threads_posix.h:87
#6  0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#7  0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f60d2ffd700 (LWP 1562)):
#0  futex_wait_cancelable (private=&lt;optimized out&gt;, expected=0, futex_word=0x55df44f7e898) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55df44f7e848, cond=0x55df44f7e870) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55df44f7e870, mutex=0x55df44f7e848) at pthread_cond_wait.c:638
#3  0x00007f60d8f2c35b in cnd_wait (mtx=0x55df44f7e848, cond=0x55df44f7e870) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x55df4525e0a0) at ../src/util/u_queue.c:275
#5  0x00007f60d8f2bf6b in impl_thrd_routine (p=&lt;optimized out&gt;) at ../include/c11/threads_posix.h:87
#6  0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#7  0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f60d37fe700 (LWP 1561)):
#0  futex_wait_cancelable (private=&lt;optimized out&gt;, expected=0, futex_word=0x55df44f7e898) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55df44f7e848, cond=0x55df44f7e870) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55df44f7e870, mutex=0x55df44f7e848) at pthread_cond_wait.c:638
#3  0x00007f60d8f2c35b in cnd_wait (mtx=0x55df44f7e848, cond=0x55df44f7e870) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x55df44f2f570) at ../src/util/u_queue.c:275
#5  0x00007f60d8f2bf6b in impl_thrd_routine (p=&lt;optimized out&gt;) at ../include/c11/threads_posix.h:87
#6  0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#7  0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f60d3fff700 (LWP 1560)):
#0  futex_wait_cancelable (private=&lt;optimized out&gt;, expected=0, futex_word=0x55df44f7e898) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55df44f7e848, cond=0x55df44f7e870) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55df44f7e870, mutex=0x55df44f7e848) at pthread_cond_wait.c:638
#3  0x00007f60d8f2c35b in cnd_wait (mtx=0x55df44f7e848, cond=0x55df44f7e870) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x55df44fa7d20) at ../src/util/u_queue.c:275
#5  0x00007f60d8f2bf6b in impl_thrd_routine (p=&lt;optimized out&gt;) at ../include/c11/threads_posix.h:87
#6  0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#7  0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f60dadee700 (LWP 1528)):
#0  0x00007f60e53ec96f in __GI___poll (fds=0x7f60cc0025e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f60e40131ae in g_main_context_poll (priority=&lt;optimized out&gt;, n_fds=1, fds=0x7f60cc0025e0, timeout=&lt;optimized out&gt;, context=0x7f60cc000c30) at ../../../glib/gmain.c:4346
#2  g_main_context_iterate (context=context@entry=0x7f60cc000c30, block=block@entry=1, dispatch=dispatch@entry=1, self=&lt;optimized out&gt;) at ../../../glib/gmain.c:4042
#3  0x00007f60e40132e3 in g_main_context_iteration (context=0x7f60cc000c30, may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#4  0x00007f60e598a583 in QEventDispatcherGlib::processEvents (this=0x7f60cc000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f60e59314db in QEventLoop::exec (this=this@entry=0x7f60dadedd80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007f60e5769785 in QThread::exec (this=&lt;optimized out&gt;) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007f60e70dc1a9 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f60e576a9d2 in QThreadPrivate::start (arg=0x55df44db0280) at thread/qthread_unix.cpp:361
#9  0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#10 0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f60dbfff700 (LWP 1438)):
#0  g_source_ref (source=0x7f60d4004d60) at ../../../glib/gmain.c:2166
#1  0x00007f60e4011168 in g_source_iter_next (iter=iter@entry=0x7f60dbffebb0, source=source@entry=0x7f60dbffeba8) at ../../../glib/gmain.c:1046
#2  0x00007f60e401266b in g_main_context_prepare (context=context@entry=0x7f60d4000c30, priority=priority@entry=0x7f60dbffec30) at ../../../glib/gmain.c:3597
#3  0x00007f60e40130db in g_main_context_iterate (context=context@entry=0x7f60d4000c30, block=block@entry=1, dispatch=dispatch@entry=1, self=&lt;optimized out&gt;) at ../../../glib/gmain.c:4027
#4  0x00007f60e40132e3 in g_main_context_iteration (context=0x7f60d4000c30, may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#5  0x00007f60e598a583 in QEventDispatcherGlib::processEvents (this=0x7f60d4000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f60e59314db in QEventLoop::exec (this=this@entry=0x7f60dbffed70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f60e5769785 in QThread::exec (this=&lt;optimized out&gt;) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f60e699defa in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f60e576a9d2 in QThreadPrivate::start (arg=0x7f60e6a20d80) at thread/qthread_unix.cpp:361
#10 0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#11 0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f60e0e23700 (LWP 1411)):
#0  0x00007f60e53ec96f in __GI___poll (fds=0x7f60e0e22ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f60e7855c1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f60e785790a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f60e160f298 in QXcbEventQueue::run (this=0x55df44bb6e40) at qxcbeventqueue.cpp:228
#4  0x00007f60e576a9d2 in QThreadPrivate::start (arg=0x55df44bb6e40) at thread/qthread_unix.cpp:361
#5  0x00007f60e4c10609 in start_thread (arg=&lt;optimized out&gt;) at pthread_create.c:477
#6  0x00007f60e53f9103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f60e1d1f280 (LWP 1396)):
[KCrash Handler]
#6  0x00007f60e7c57321 in PlasmaQuick::ContainmentView::containment() const () from /lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#7  0x000055df42b4a372 in ShellCorona::screenForContainment (this=0x55df44c347b0, containment=&lt;optimized out&gt;) at ./shell/shellcorona.cpp:1995
#8  0x00007f60e0125525 in AppletInterface::&lt;lambda(int)&gt;::operator() (__closure=0x55df44e489f0, id=0) at ./src/scriptengines/qml/plasmoid/appletinterface.cpp:129
#9  QtPrivate::FunctorCall&lt;QtPrivate::IndexesList&lt;0&gt;, QtPrivate::List&lt;int&gt;, void, AppletInterface::AppletInterface(DeclarativeAppletScript*, const QVariantList&amp;, QQuickItem*)::&lt;lambda(int)&gt; &gt;::call (arg=&lt;optimized out&gt;, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#10 QtPrivate::Functor&lt;AppletInterface::AppletInterface(DeclarativeAppletScript*, const QVariantList&amp;, QQuickItem*)::&lt;lambda(int)&gt;, 1&gt;::call&lt;QtPrivate::List&lt;int&gt;, void&gt; (arg=&lt;optimized out&gt;, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#11 QtPrivate::QFunctorSlotObject&lt;AppletInterface::AppletInterface(DeclarativeAppletScript*, const QVariantList&amp;, QQuickItem*)::&lt;lambda(int)&gt;, 1, QtPrivate::List&lt;int&gt;, void&gt;::impl (which=1, r=&lt;optimized out&gt;, ret=&lt;optimized out&gt;, a=&lt;optimized out&gt;, this_=0x55df44e489e0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:439
#12 QtPrivate::QFunctorSlotObject&lt;AppletInterface::AppletInterface(DeclarativeAppletScript*, const QVariantList&amp;, QQuickItem*)::&lt;lambda(int)&gt;, 1, QtPrivate::List&lt;int&gt;, void&gt;::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=&lt;optimized out&gt;, this_=0x55df44e489e0, r=&lt;optimized out&gt;, a=&lt;optimized out&gt;, ret=&lt;optimized out&gt;) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:432
#13 0x00007f60e595e458 in QtPrivate::QSlotObjectBase::call (a=0x7ffdf0833390, r=0x55df44dcbc10, this=0x55df44e489e0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#14 QMetaObject::activate (sender=0x55df44c347b0, signalOffset=&lt;optimized out&gt;, local_signal_index=&lt;optimized out&gt;, argv=&lt;optimized out&gt;) at kernel/qobject.cpp:3784
#15 0x00007f60e77aa575 in Plasma::Corona::screenGeometryChanged(int) () from /lib/x86_64-linux-gnu/libKF5Plasma.so.5
#16 0x000055df42b46abc in ShellCorona::&lt;lambda()&gt;::operator() (__closure=0x55df46bfe730, __closure=0x55df46bfe730) at ./shell/shellcorona.cpp:1292
#17 QtPrivate::FunctorCall&lt;QtPrivate::IndexesList&lt;&gt;, QtPrivate::List&lt;&gt;, void, ShellCorona::addOutput(QScreen*)::&lt;lambda()&gt; &gt;::call (arg=&lt;optimized out&gt;, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#18 QtPrivate::Functor&lt;ShellCorona::addOutput(QScreen*)::&lt;lambda()&gt;, 0&gt;::call&lt;QtPrivate::List&lt;&gt;, void&gt; (arg=&lt;optimized out&gt;, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#19 QtPrivate::QFunctorSlotObject&lt;ShellCorona::addOutput(QScreen*)::&lt;lambda()&gt;, 0, QtPrivate::List&lt;&gt;, void&gt;::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=&lt;optimized out&gt;, this_=0x55df46bfe720, r=&lt;optimized out&gt;, a=&lt;optimized out&gt;, ret=&lt;optimized out&gt;) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:439
#20 0x00007f60e595e458 in QtPrivate::QSlotObjectBase::call (a=0x7ffdf08334e0, r=0x55df44c347b0, this=0x55df46bfe720) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#21 QMetaObject::activate (sender=0x55df44bf40b0, signalOffset=&lt;optimized out&gt;, local_signal_index=&lt;optimized out&gt;, argv=&lt;optimized out&gt;) at kernel/qobject.cpp:3784
#22 0x00007f60e60de886 in QScreen::geometryChanged (this=this@entry=0x55df44bf40b0, _t1=...) at .moc/moc_qscreen.cpp:371
#23 0x00007f60e5d1cb77 in QGuiApplicationPrivate::processScreenGeometryChange (e=&lt;optimized out&gt;) at kernel/qguiapplication.cpp:2994
#24 QGuiApplicationPrivate::processScreenGeometryChange (e=&lt;optimized out&gt;) at kernel/qguiapplication.cpp:2973
#25 0x00007f60e5d1d030 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x55df4ac691c0) at kernel/qguiapplication.cpp:1891
#26 0x00007f60e5cf735b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1151
#27 0x00007f60e161032e in xcbSourceDispatch (source=&lt;optimized out&gt;) at qxcbeventdispatcher.cpp:105
#28 0x00007f60e4012fbd in g_main_dispatch (context=0x7f60dc005010) at ../../../glib/gmain.c:3309
#29 g_main_context_dispatch (context=context@entry=0x7f60dc005010) at ../../../glib/gmain.c:3974
#30 0x00007f60e4013240 in g_main_context_iterate (context=context@entry=0x7f60dc005010, block=block@entry=1, dispatch=dispatch@entry=1, self=&lt;optimized out&gt;) at ../../../glib/gmain.c:4047
#31 0x00007f60e40132e3 in g_main_context_iteration (context=0x7f60dc005010, may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#32 0x00007f60e598a565 in QEventDispatcherGlib::processEvents (this=0x55df44c1f930, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#33 0x00007f60e59314db in QEventLoop::exec (this=this@entry=0x7ffdf08337f0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#34 0x00007f60e5939246 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#35 0x000055df42b20b25 in main (argc=&lt;optimized out&gt;, argv=&lt;optimized out&gt;) at ./shell/main.cpp:228
[Inferior 1 (process 1396) detached]

Possible duplicates by query: bug 421611, bug 415884, bug 413185, bug 385342, bug 379085.

Reported using DrKonqi</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1937327</commentid>
    <comment_count>1</comment_count>
    <who name="Marco Martin">notmart</who>
    <bug_when>2020-06-15 14:43:51 +0000</bug_when>
    <thetext>a desktop view has been deleted without ShellCorona::handleScreenRemoved or ShellCorona::removeDesktop being called</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1998167</commentid>
    <comment_count>2</comment_count>
    <who name="Nate Graham">nate</who>
    <bug_when>2021-01-26 23:15:44 +0000</bug_when>
    <thetext>*** Bug 431726 has been marked as a duplicate of this bug. ***</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1998169</commentid>
    <comment_count>3</comment_count>
    <who name="Nate Graham">nate</who>
    <bug_when>2021-01-26 23:15:49 +0000</bug_when>
    <thetext>*** Bug 375750 has been marked as a duplicate of this bug. ***</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2006509</commentid>
    <comment_count>4</comment_count>
    <who name="Nate Graham">nate</who>
    <bug_when>2021-02-25 21:14:47 +0000</bug_when>
    <thetext>*** Bug 433486 has been marked as a duplicate of this bug. ***</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2010133</commentid>
    <comment_count>5</comment_count>
    <who name="Nate Graham">nate</who>
    <bug_when>2021-03-08 22:02:12 +0000</bug_when>
    <thetext>

*** This bug has been marked as a duplicate of bug 373885 ***</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2476191</commentid>
    <comment_count>6</comment_count>
    <who name="Nate Graham">nate</who>
    <bug_when>2025-12-11 16:58:59 +0000</bug_when>
    <thetext>Apparently this was not a duplicate of Bug 373885, as that&apos;s fixed but we just got a new report of this exact crash. Forward-duping it to Bug 513216 since it has a fully symbolicated backtrace.

*** This bug has been marked as a duplicate of bug 513216 ***</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>