Bug 515480 - Plasma crash when turning off the display and turning it on again
Summary: Plasma crash when turning off the display and turning it on again
Status: RESOLVED DUPLICATE of bug 511757
Alias: None
Product: plasmashell
Classification: Plasma
Component: generic-crash (other bugs)
Version First Reported In: 6.5.5
Platform: Fedora RPMs Linux
: NOR crash
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords: drkonqi
Depends on:
Blocks:
 
Reported: 2026-02-04 03:27 UTC by tfk
Modified: 2026-02-04 18:20 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
New crash information added by DrKonqi (64.31 KB, text/plain)
2026-02-04 03:27 UTC, tfk 		Details
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Description tfk 2026-02-04 03:27:49 UTC 
Application: plasmashell (6.5.5)

ApplicationNotResponding [ANR]: false
Qt Version: 6.10.1
Frameworks Version: 6.22.0
Operating System: Linux 6.18.7-200.fc43.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 43 (KDE Plasma Desktop Edition)"
DrKonqi: 6.5.5 [CoredumpBackend]

-- Information about the crash:
I have some cheap speakers connected to my monitor. But when I start the machine those speakers don't always work. I have to switch the monitor off and on again in order to make them work. But when I do, plasma often crashes.

The crash can be reproduced sometimes.

-- Backtrace (Reduced):
#5  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#6  0x00007f4dd6281493 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89
#7  0x00007f4dd622715e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007f4dd620e6d0 in __GI_abort () at abort.c:77
#9  0x00007f4dd681b204 in qAbort () at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qassert.cpp:46
#10 0x00007f4dd686fdf9 in qt_maybe_message_fatal<QString&> (msgType=QtFatalMsg, context=<optimized out>, message=...) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:2166
[...]
#12 0x00007f4dd681c996 in QMessageLogger::fatal (this=this@entry=0x7ffee65eba20, msg=msg@entry=0x7f4d9eb34b20 "KWaylandBackend: no output modes available anymore, this seems like a compositor bug") at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:901
#13 0x00007f4d9eb1ded0 in operator() (__closure=<optimized out>) at /usr/src/debug/libkscreen-6.5.5-1.fc43.x86_64/backends/kwayland/waylandoutputdevice.cpp:73
#14 operator() (__closure=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:116
#18 QtPrivate::QCallableObject<KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()>, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:547
#19 0x00007f4dd696759a in QtPrivate::QSlotObjectBase::call (this=0x565077640780, r=0x5650771627f0, a=0x7ffee65ebad8) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#20 doActivate<false> (sender=0x565077640730, signal_index=<optimized out>, argv=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobject.cpp:4257
#21 0x00007f4dd7a28056 in ffi_call_unix64 () at ../src/x86/unix64.S:104
#22 0x00007f4dd7a23d16 in ffi_call_int (cif=cif@entry=0x7ffee65ebce0, fn=fn@entry=0x7f4d9eb1e390 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffee65ebdb0, closure=closure@entry=0x0) at ../src/x86/ffi64.c:676
#23 0x00007f4dd7a267ae in ffi_call (cif=cif@entry=0x7ffee65ebce0, fn=0x7f4d9eb1e390 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffee65ebdb0) at ../src/x86/ffi64.c:713
#24 0x00007f4dd9a46feb in wl_closure_invoke (closure=closure@entry=0x7f4d54010430, target=<optimized out>, target@entry=0x7f4dac00a660, opcode=opcode@entry=3, data=<optimized out>, flags=1) at ../src/connection.c:1241
#5  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#6  0x00007f4dd6281493 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89
#7  0x00007f4dd622715e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007f4dd620e6d0 in __GI_abort () at abort.c:77
#9  0x00007f4dd681b204 in qAbort () at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qassert.cpp:46
#10 0x00007f4dd686fdf9 in qt_maybe_message_fatal<QString&> (msgType=QtFatalMsg, context=<optimized out>, message=...) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:2166
[...]
#12 0x00007f4dd681c996 in QMessageLogger::fatal (this=this@entry=0x7ffee65eba20, msg=msg@entry=0x7f4d9eb34b20 "KWaylandBackend: no output modes available anymore, this seems like a compositor bug") at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:901
#13 0x00007f4d9eb1ded0 in operator() (__closure=<optimized out>) at /usr/src/debug/libkscreen-6.5.5-1.fc43.x86_64/backends/kwayland/waylandoutputdevice.cpp:73
#14 operator() (__closure=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:116
#18 QtPrivate::QCallableObject<KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()>, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:547
#19 0x00007f4dd696759a in QtPrivate::QSlotObjectBase::call (this=0x565077640780, r=0x5650771627f0, a=0x7ffee65ebad8) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#20 doActivate<false> (sender=0x565077640730, signal_index=<optimized out>, argv=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobject.cpp:4257
#21 0x00007f4dd7a28056 in ffi_call_unix64 () at ../src/x86/unix64.S:104
#22 0x00007f4dd7a23d16 in ffi_call_int (cif=cif@entry=0x7ffee65ebce0, fn=fn@entry=0x7f4d9eb1e390 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffee65ebdb0, closure=closure@entry=0x0) at ../src/x86/ffi64.c:676
#23 0x00007f4dd7a267ae in ffi_call (cif=cif@entry=0x7ffee65ebce0, fn=0x7f4d9eb1e390 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffee65ebdb0) at ../src/x86/ffi64.c:713
#24 0x00007f4dd9a46feb in wl_closure_invoke (closure=closure@entry=0x7f4d54010430, target=<optimized out>, target@entry=0x7f4dac00a660, opcode=opcode@entry=3, data=<optimized out>, flags=1) at ../src/connection.c:1241


Reported using DrKonqi
Comment 1 tfk 2026-02-04 03:27:51 UTC 
Created attachment 189200 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.
Comment 2 TraceyC 2026-02-04 18:18:41 UTC 
Searchable backtrace

[KCrash Handler]
#5  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#6  0x00007f4dd6281493 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89
#7  0x00007f4dd622715e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007f4dd620e6d0 in __GI_abort () at abort.c:77
#9  0x00007f4dd681b204 in qAbort () at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qassert.cpp:46
#10 0x00007f4dd686fdf9 in qt_maybe_message_fatal<QString&> (msgType=QtFatalMsg, context=<optimized out>, message=...) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:2166
#11 qt_message(QtMsgType, const QMessageLogContext &, const char *, typedef __va_list_tag __va_list_tag *) (msgType=msgType@entry=QtFatalMsg, context=..., msg=msg@entry=0x7f4d9eb34b20 "KWaylandBackend: no output modes available anymore, this seems like a compositor bug", ap=ap@entry=0x7ffee65eb7c8) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:412
#12 0x00007f4dd681c996 in QMessageLogger::fatal (this=this@entry=0x7ffee65eba20, msg=msg@entry=0x7f4d9eb34b20 "KWaylandBackend: no output modes available anymore, this seems like a compositor bug") at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/global/qlogging.cpp:901
#13 0x00007f4d9eb1ded0 in operator() (__closure=<optimized out>) at /usr/src/debug/libkscreen-6.5.5-1.fc43.x86_64/backends/kwayland/waylandoutputdevice.cpp:73
#14 operator() (__closure=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:116
#15 QtPrivate::FunctorCallBase::call_internal<void, QtPrivate::FunctorCall<std::integer_sequence<long unsigned int>, QtPrivate::List<>, void, KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()> >::call(KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()>&, void**)::<lambda()> > (args=<optimized out>, fn=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:65
#16 QtPrivate::FunctorCall<std::integer_sequence<long unsigned int>, QtPrivate::List<>, void, KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()> >::call (f=<optimized out>, arg=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:115
#17 QtPrivate::FunctorCallable<KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()> >::call<QtPrivate::List<>, void> (f=<optimized out>, arg=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:337
#18 QtPrivate::QCallableObject<KScreen::WaylandOutputDevice::kde_output_device_v2_mode(kde_output_device_mode_v2*)::<lambda()>, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:547
#19 0x00007f4dd696759a in QtPrivate::QSlotObjectBase::call (this=0x565077640780, r=0x5650771627f0, a=0x7ffee65ebad8) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#20 doActivate<false> (sender=0x565077640730, signal_index=<optimized out>, argv=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobject.cpp:4257
#21 0x00007f4dd7a28056 in ffi_call_unix64 () at ../src/x86/unix64.S:104
#22 0x00007f4dd7a23d16 in ffi_call_int (cif=cif@entry=0x7ffee65ebce0, fn=fn@entry=0x7f4d9eb1e390 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffee65ebdb0, closure=closure@entry=0x0) at ../src/x86/ffi64.c:676
#23 0x00007f4dd7a267ae in ffi_call (cif=cif@entry=0x7ffee65ebce0, fn=0x7f4d9eb1e390 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffee65ebdb0) at ../src/x86/ffi64.c:713
#24 0x00007f4dd9a46feb in wl_closure_invoke (closure=closure@entry=0x7f4d54010430, target=<optimized out>, target@entry=0x7f4dac00a660, opcode=opcode@entry=3, data=<optimized out>, flags=1) at ../src/connection.c:1241
#25 0x00007f4dd9a47e49 in dispatch_event (display=display@entry=0x5650765ab750, queue=queue@entry=0x5650765ab848) at ../src/wayland-client.c:1707
#26 0x00007f4dd9a48243 in dispatch_queue (display=0x5650765ab750, queue=0x5650765ab848) at ../src/wayland-client.c:1853
#27 wl_display_dispatch_queue_pending (display=0x5650765ab750, queue=0x5650765ab848) at ../src/wayland-client.c:2190
#28 0x00007f4dd82f91f2 in QtWaylandClient::EventThread::readAndDispatchEvents (this=0x5650765c9d60) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/plugins/platforms/wayland/qwaylanddisplay.cpp:230
#29 0x00007f4dd82f1d71 in QtWaylandClient::QWaylandDisplay::flushRequests (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/plugins/platforms/wayland/qwaylanddisplay.cpp:522
#30 0x00007f4dd6958fcc in QObject::event (this=<optimized out>, e=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qobject.cpp:1413
#31 0x00007f4dd8e3db9f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5650765ab520, e=0x7f4db4006550) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/widgets/kernel/qapplication.cpp:3305
#32 0x00007f4dd68fc4e8 in QCoreApplication::notifyInternal2 (receiver=0x5650765ab520, event=0x7f4db4006550) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qcoreapplication.cpp:1109
#33 0x00007f4dd68fc74d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qcoreapplication.cpp:1549
#34 0x00007f4dd68ffb09 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x5650765a1660) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qcoreapplication.cpp:1904
#35 0x00007f4dd6c1efcf in postEventSourceDispatch (s=0x5650765a88b0) at /usr/src/debug/qt6-qtbase-6.10.1-3.fc43.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:246
#36 0x00007f4dd54372a3 in g_main_dispatch (context=0x7f4dbc000f60) at ../glib/gmain.c:3565
Comment 3 TraceyC 2026-02-04 18:20:55 UTC 
Thank you for the bug report. Based on the backtrace this looks like a duplicate of bug 511757 so I'll merge this report in with the other one. Please follow that report if you would like updates on the progress of this issue.

*** This bug has been marked as a duplicate of bug 511757 ***