Bug 427827

Summary: Wayland Plasma crashes after disconnecting second screen
Product: [Plasma] plasmashell Reporter: Alexander <alexander.reimelt>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: plasma-bugs-null, postix
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.20.0   
Target Milestone: 1.0   
Platform: openSUSE   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=415240
https://bugs.kde.org/show_bug.cgi?id=419728
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: plasma crash after connecting a screen

Description Alexander 2020-10-16 19:03:38 UTC 
Application: plasmashell (5.20.0)

Qt Version: 5.15.1
Frameworks Version: 5.75.0
Operating System: Linux 5.8.14-1-default x86_64
Windowing system: Wayland
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:
unplugged the screen and plasma crashed
crashes sometimes after connecting it as well

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Aborted

[New LWP 14426]
[New LWP 14486]
[New LWP 14500]
[New LWP 14501]
[New LWP 14502]
[New LWP 14503]
[New LWP 14504]
[New LWP 14505]
[New LWP 14506]
[New LWP 14507]
[New LWP 14508]
[New LWP 14509]
[New LWP 14510]
[New LWP 14511]
[New LWP 14512]
[New LWP 14513]
[New LWP 14514]
[New LWP 14543]
[New LWP 14544]
[New LWP 14545]
[New LWP 14546]
[New LWP 14547]
[New LWP 14549]
[New LWP 14553]
[New LWP 14559]
[New LWP 14560]
[New LWP 14561]
[New LWP 14563]
[New LWP 14566]
[New LWP 14575]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
0x00007f4935f1ae7f in poll () from /lib64/libc.so.6
[Current thread is 1 (Thread 0x7f4933e1a840 (LWP 14413))]

Thread 31 (Thread 0x7f4886ffd640 (LWP 14575)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 30 (Thread 0x7f48863fc640 (LWP 14566)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 29 (Thread 0x7f4887fff640 (LWP 14563)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 28 (Thread 0x7f48adbfb640 (LWP 14561)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f49362ac92b in QWaitConditionPrivate::wait (deadline=..., deadline=..., this=0x5640586c76c0) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5640586c75c0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007f4937f5cb57 in ?? () from /usr/lib64/libQt5Quick.so.5
#4  0x00007f4937f5efe9 in ?? () from /usr/lib64/libQt5Quick.so.5
#5  0x00007f49362a6911 in QThreadPrivate::start (arg=0x5640586c7520) at thread/qthread_unix.cpp:329
#6  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 27 (Thread 0x7f48ae7fc640 (LWP 14560)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 26 (Thread 0x7f48aeffd640 (LWP 14559)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 25 (Thread 0x7f48b6a64640 (LWP 14553)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 24 (Thread 0x7f48c897c640 (LWP 14549)):
#0  0x00007fffdcd0faad in ?? ()
#1  0x00007f4935eed0d1 in clock_gettime@GLIBC_2.2.5 () from /lib64/libc.so.6
#2  0x00007f49364dcec1 in qt_clock_gettime (ts=0x7f48c897ba50, clock=1) at kernel/qelapsedtimer_unix.cpp:175
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f49364db799 in QTimerInfoList::updateCurrentTime (this=0x7f48bc004950) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f49364dda75 in timerSourceCheckHelper (src=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:570
#7  timerSourceCheck (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:174
#8  0x00007f49348f2009 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#9  0x00007f49348f2595 in ?? () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f49348f270f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#11 0x00007f49364dd5cb in QEventDispatcherGlib::processEvents (this=0x7f48bc000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#12 0x00007f4936484a1b in QEventLoop::exec (this=this@entry=0x7f48c897bc80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#13 0x00007f49362a57ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#14 0x00007f48c8ebe428 in KCupsConnection::run() () from /usr/lib64/libkcupslib.so
#15 0x00007f49362a6911 in QThreadPrivate::start (arg=0x564057a57310) at thread/qthread_unix.cpp:329
#16 0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#17 0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 23 (Thread 0x7f48c985a640 (LWP 14547)):
#0  0x00007fffdcd0faad in ?? ()
#1  0x00007f4935eed0d1 in clock_gettime@GLIBC_2.2.5 () from /lib64/libc.so.6
#2  0x00007f49364dcec1 in qt_clock_gettime (ts=0x7f48c9859a20, clock=1) at kernel/qelapsedtimer_unix.cpp:175
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f49364db799 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f48b8004d50) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f49364dbd75 in QTimerInfoList::timerWait (this=0x7f48b8004d50, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f49364dd31e in timerSourcePrepareHelper (timeout=0x7f48c9859af4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:162
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f48c9859af4) at kernel/qeventdispatcher_glib.cpp:166
#9  0x00007f49348f1b12 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f49348f251b in ?? () from /usr/lib64/libglib-2.0.so.0
#11 0x00007f49348f270f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#12 0x00007f49364dd5cb in QEventDispatcherGlib::processEvents (this=0x7f48b8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f4936484a1b in QEventLoop::exec (this=this@entry=0x7f48c9859cc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#14 0x00007f49362a57ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#15 0x00007f49362a6911 in QThreadPrivate::start (arg=0x564057a27630) at thread/qthread_unix.cpp:329
#16 0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#17 0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 22 (Thread 0x7f48cbfff640 (LWP 14546)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f49362ac92b in QWaitConditionPrivate::wait (deadline=..., deadline=..., this=0x564056b75f50) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7f492c0139c0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007f4937f5cb57 in ?? () from /usr/lib64/libQt5Quick.so.5
#4  0x00007f4937f5efe9 in ?? () from /usr/lib64/libQt5Quick.so.5
#5  0x00007f49362a6911 in QThreadPrivate::start (arg=0x7f492c013920) at thread/qthread_unix.cpp:329
#6  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 21 (Thread 0x7f48dce7a640 (LWP 14545)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 20 (Thread 0x7f48dda7c640 (LWP 14544)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 19 (Thread 0x7f48dee2c640 (LWP 14543)):
#0  0x00007fffdcd0faad in ?? ()
#1  0x00007f4935eed0d1 in clock_gettime@GLIBC_2.2.5 () from /lib64/libc.so.6
#2  0x00007f49364dcec1 in qt_clock_gettime (ts=0x7f48dee2b9e0, clock=1) at kernel/qelapsedtimer_unix.cpp:175
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f49364db799 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f48d4012ab0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f49364dbd75 in QTimerInfoList::timerWait (this=0x7f48d4012ab0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f49364dd31e in timerSourcePrepareHelper (timeout=0x7f48dee2bab4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:162
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f48dee2bab4) at kernel/qeventdispatcher_glib.cpp:166
#9  0x00007f49348f1b12 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f49348f251b in ?? () from /usr/lib64/libglib-2.0.so.0
#11 0x00007f49348f270f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#12 0x00007f49364dd5cb in QEventDispatcherGlib::processEvents (this=0x7f48d400ee30, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f4936484a1b in QEventLoop::exec (this=this@entry=0x7f48dee2bc80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#14 0x00007f49362a57ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#15 0x00007f4937eb0926 in ?? () from /usr/lib64/libQt5Quick.so.5
#16 0x00007f49362a6911 in QThreadPrivate::start (arg=0x564057364360) at thread/qthread_unix.cpp:329
#17 0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#18 0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 18 (Thread 0x7f48fcff9640 (LWP 14514)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 17 (Thread 0x7f48fd7fa640 (LWP 14513)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 16 (Thread 0x7f48fdffb640 (LWP 14512)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 15 (Thread 0x7f48fe7fc640 (LWP 14511)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7f48feffd640 (LWP 14510)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7f48ff7fe640 (LWP 14509)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7f48fffff640 (LWP 14508)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7f491c974640 (LWP 14507)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f491d175640 (LWP 14506)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f491d976640 (LWP 14505)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f491e177640 (LWP 14504)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f491e978640 (LWP 14503)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f491f179640 (LWP 14502)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f4928fe2640 (LWP 14501)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f4929959640 (LWP 14500)):
#0  0x00007f4935476082 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f492a052bcb in ?? () from /usr/lib64/dri/radeonsi_dri.so
#2  0x00007f492a052af7 in ?? () from /usr/lib64/dri/radeonsi_dri.so
#3  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f492bfff640 (LWP 14486)):
#0  0x00007fffdcd0faad in ?? ()
#1  0x00007f4935eed0d1 in clock_gettime@GLIBC_2.2.5 () from /lib64/libc.so.6
#2  0x00007f49364dcec1 in qt_clock_gettime (ts=0x7f492bffea00, clock=1) at kernel/qelapsedtimer_unix.cpp:175
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f49364db799 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f4924004d50) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f49364dbd75 in QTimerInfoList::timerWait (this=0x7f4924004d50, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f49364dd31e in timerSourcePrepareHelper (timeout=0x7f492bffead4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:162
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f492bffead4) at kernel/qeventdispatcher_glib.cpp:166
#9  0x00007f49348f1b12 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f49348f251b in ?? () from /usr/lib64/libglib-2.0.so.0
#11 0x00007f49348f270f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#12 0x00007f49364dd5cb in QEventDispatcherGlib::processEvents (this=0x7f4924000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f4936484a1b in QEventLoop::exec (this=this@entry=0x7f492bffeca0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#14 0x00007f49362a57ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#15 0x00007f4937af22d5 in ?? () from /usr/lib64/libQt5Qml.so.5
#16 0x00007f49362a6911 in QThreadPrivate::start (arg=0x564056d4c070) at thread/qthread_unix.cpp:329
#17 0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#18 0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f4931969640 (LWP 14426)):
#0  0x00007f49348f1a35 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f49348f251b in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f49348f270f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f49364dd5cb in QEventDispatcherGlib::processEvents (this=0x7f492c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4936484a1b in QEventLoop::exec (this=this@entry=0x7f4931968c70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007f49362a57ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007f4936e77a27 in ?? () from /usr/lib64/libQt5DBus.so.5
#7  0x00007f49362a6911 in QThreadPrivate::start (arg=0x7f4936ee4d80) at thread/qthread_unix.cpp:329
#8  0x00007f493546feb1 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f4935f25ccf in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f4933e1a840 (LWP 14413)):
[KCrash Handler]
#4  0x00007f4935e63641 in raise () from /lib64/libc.so.6
#5  0x00007f4935e4c538 in abort () from /lib64/libc.so.6
#6  0x00007f493626bc37 in qt_message_fatal (message=<synthetic pointer>..., context=...) at global/qlogging.cpp:1914
#7  QMessageLogger::fatal (this=this@entry=0x7fffdccd0fe0, msg=msg@entry=0x7f4931fcb0f8 "The Wayland connection experienced a fatal error: %s") at global/qlogging.cpp:893
#8  0x00007f4931f54d80 in QtWaylandClient::QWaylandDisplay::checkError (this=<optimized out>) at /usr/include/qt5/QtCore/qlogging.h:90
#9  0x00007f4931f54dce in QtWaylandClient::QWaylandDisplay::flushRequests (this=0x564056ad1400) at qwaylanddisplay.cpp:222
#10 0x00007f49364bc680 in doActivate<false> (sender=0x564056af8f60, signal_index=4, argv=0x7fffdccd10c0, argv@entry=0x0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395
#11 0x00007f49364b59a0 in QMetaObject::activate (sender=sender@entry=0x564056af8f60, m=m@entry=0x7f4936769180 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3946
#12 0x00007f4936482bf3 in QAbstractEventDispatcher::awake (this=this@entry=0x564056af8f60) at .moc/moc_qabstracteventdispatcher.cpp:149
#13 0x00007f49364dd5ec in QEventDispatcherGlib::processEvents (this=0x564056af8f60, flags=...) at kernel/qeventdispatcher_glib.cpp:430
#14 0x00007f4936484a1b in QEventLoop::exec (this=this@entry=0x7fffdccd11e0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#15 0x00007f493648cc90 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#16 0x00005640568a0f89 in main (argc=<optimized out>, argv=0x7fffdccd1400) at /usr/src/debug/plasma5-workspace-5.20.0-2.1.x86_64/shell/main.cpp:244
[Inferior 1 (process 14413) detached]

Possible duplicates by query: bug 427593, bug 427522, bug 427228, bug 426926, bug 426449.

Reported using DrKonqi
Comment 1 Alexander 2020-10-17 09:05:15 UTC 
Created attachment 132461 [details]
plasma crash after connecting a screen

not sure if done correctly
attached plasma to gdb
(gdb) continue
connected monitor -> plasma crashed
(gdb) thread apply all bt
Comment 2 Vlad Zahorodnii 2020-10-26 16:06:51 UTC 

*** This bug has been marked as a duplicate of bug 426293 ***