Bug 514058

Summary:	plasmashell crashes everytime after monitor logout/lock, monitor power off, standby or sleep
Product:	[Plasma] plasmashell	Reporter:	phil.atram
Component:	generic-crash	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	kde
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	6.5.4
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:	https://crash-reports.kde.org/organizations/kde/issues/1719/events/4d9641120e674e50bc02e013d2bc5f62/
Attachments:	New crash information added by DrKonqi

Description phil.atram 2026-01-01 23:04:00 UTC

Application: plasmashell (6.5.4)

ApplicationNotResponding [ANR]: false
Qt Version: 6.10.1
Frameworks Version: 6.21.0
Operating System: Linux 6.18.2-arch2-1 x86_64
Windowing System: Wayland
Distribution: Arch Linux
DrKonqi: 6.5.4 [CoredumpBackend]

-- Information about the crash:
Each an everytime my monitor goes to sleep, or I log out or I turn off a monitor (I have two) manually off, plasmashell crashes.

The crash can be reproduced every time.

-- 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  0x00007f868cc989d3 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89
#7  0x00007f868cc3e3a0 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007f868cc2557a in __GI_abort () at abort.c:77
#9  0x00007f868d4934a4 in qAbort () at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qassert.cpp:46
#10 qt_maybe_message_fatal<QString&> (msgType=QtFatalMsg, context=<optimized out>, message=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qlogging.cpp:2166
[...]
#12 0x00007f868d494268 in QMessageLogger::fatal (this=this@entry=0x7ffe64531880, msg=msg@entry=0x7f86593f76d0 "KWaylandBackend: no output modes available anymore, this seems like a compositor bug") at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qlogging.cpp:901
#13 0x00007f86593e71de in operator() (__closure=<optimized out>) at /usr/src/debug/libkscreen/libkscreen-6.5.4/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 0x00007f868d5d734f in QtPrivate::QSlotObjectBase::call (this=0x5577ed8ff3c0, r=0x5577ed926980, a=0x7ffe64531938, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:461
#20 doActivate<false> (sender=<optimized out>, signal_index=<optimized out>, argv=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4257
#21 0x00007f868ce44ac6 in ffi_call_unix64 () at ../src/x86/unix64.S:104
#22 0x00007f868ce4176b in ffi_call_int (cif=cif@entry=0x7ffe64531b40, fn=fn@entry=0x7f86593e7650 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffe64531c10, closure=closure@entry=0x0) at ../src/x86/ffi64.c:676
#23 0x00007f868ce4406e in ffi_call (cif=cif@entry=0x7ffe64531b40, fn=0x7f86593e7650 <QtWayland::kde_output_device_mode_v2::handle_removed(void*, kde_output_device_mode_v2*)>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffe64531c10) at ../src/x86/ffi64.c:713
#24 0x00007f86901b948d in wl_closure_invoke (closure=closure@entry=0x7f8674037030, target=<optimized out>, target@entry=0x7f8674016130, opcode=opcode@entry=3, data=<optimized out>, flags=1) at ../wayland-1.24.0/src/connection.c:1241


Reported using DrKonqi

Comment 1 phil.atram 2026-01-01 23:04:01 UTC

Created attachment 188143 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.

Comment 2 David Edmundson 2026-01-02 10:14:21 UTC


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