https://bugs.kde.org/show_bug.cgi?id=448454
Bug ID: 448454
Summary: kwin_wayland crashes when external monitor is
disconnected while mult-monitor mode is set to 'Switch
to external screen'
Product: kwin
Version: master
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
STEPS TO REPRODUCE
1. use Wayland session
2. connect a external monitor to hdmi port
3. set multi-monitor mode to ''Switc to external screen'
4. disconnect the hdmi cable
OBSERVED RESULT
kwin_crashes and I only see the mouse pointer on the laptop screen
EXPECTED RESULT
laptop screen is reactivated without any crash
SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.3
Graphics Platform: Wayland
Thread 8 (Thread 0x7fed859b0700 (LWP 6219)):
#0 0x00007fed9ca9faff in __GI___poll (fds=0x7fed6c005240, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fed9b00f36e in g_main_context_poll (priority=<optimized out>,
n_fds=1, fds=0x7fed6c005240, timeout=<optimized out>, context=0x7fed6c000c20)
at ../../../glib/gmain.c:4346
#2 g_main_context_iterate (context=context@entry=0x7fed6c000c20,
block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at
../../../glib/gmain.c:4042
#3 0x00007fed9b00f4a3 in g_main_context_iteration (context=0x7fed6c000c20,
may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#4 0x00007fed9d3f7842 in QEventDispatcherGlib::processEvents
(this=0x7fed6c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5 0x00007fed9d39baeb in QEventLoop::exec (this=this@entry=0x7fed859afbc0,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#6 0x00007fed9d1b5322 in QThread::exec (this=this@entry=0x559037d15540) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#7 0x00007fed9ea88559 in QQmlThreadPrivate::run (this=0x559037d15540) at
qml/ftw/qqmlthread.cpp:155
#8 0x00007fed9d1b6503 in QThreadPrivate::start (arg=0x559037d15540) at
thread/qthread_unix.cpp:331
#9 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#10 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 7 (Thread 0x7fed9549f700 (LWP 6214)):
#0 futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x559037925be8) at ../sysdeps/nptl/futex-internal.h:183
#1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559037925b98,
cond=0x559037925bc0) at pthread_cond_wait.c:508
#2 __pthread_cond_wait (cond=cond@entry=0x559037925bc0,
mutex=mutex@entry=0x559037925b98) at pthread_cond_wait.c:647
#3 0x00007fed9600db1b in cnd_wait (mtx=0x559037925b98, cond=0x559037925bc0) at
../include/c11/threads_posix.h:155
#4 util_queue_thread_func (input=input@entry=0x559037926f00) at
../src/util/u_queue.c:294
#5 0x00007fed9600d71b in impl_thrd_routine (p=<optimized out>) at
../include/c11/threads_posix.h:87
#6 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 6 (Thread 0x7fed87fff700 (LWP 6216)):
#0 futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x559037925be8) at ../sysdeps/nptl/futex-internal.h:183
#1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559037925b98,
cond=0x559037925bc0) at pthread_cond_wait.c:508
#2 __pthread_cond_wait (cond=cond@entry=0x559037925bc0,
mutex=mutex@entry=0x559037925b98) at pthread_cond_wait.c:647
#3 0x00007fed9600db1b in cnd_wait (mtx=0x559037925b98, cond=0x559037925bc0) at
../include/c11/threads_posix.h:155
#4 util_queue_thread_func (input=input@entry=0x559037927170) at
../src/util/u_queue.c:294
#5 0x00007fed9600d71b in impl_thrd_routine (p=<optimized out>) at
../include/c11/threads_posix.h:87
#6 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 5 (Thread 0x7fed94c9e700 (LWP 6215)):
#0 futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x559037925be8) at ../sysdeps/nptl/futex-internal.h:183
#1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559037925b98,
cond=0x559037925bc0) at pthread_cond_wait.c:508
#2 __pthread_cond_wait (cond=cond@entry=0x559037925bc0,
mutex=mutex@entry=0x559037925b98) at pthread_cond_wait.c:647
#3 0x00007fed9600db1b in cnd_wait (mtx=0x559037925b98, cond=0x559037925bc0) at
../include/c11/threads_posix.h:155
#4 util_queue_thread_func (input=input@entry=0x559037927130) at
../src/util/u_queue.c:294
#5 0x00007fed9600d71b in impl_thrd_routine (p=<optimized out>) at
../include/c11/threads_posix.h:87
#6 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 4 (Thread 0x7fed877fe700 (LWP 6217)):
#0 0x00007fed9ca9faff in __GI___poll (fds=0x7fed74005240, nfds=2, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fed9b00f36e in g_main_context_poll (priority=<optimized out>,
n_fds=2, fds=0x7fed74005240, timeout=<optimized out>, context=0x7fed74000c20)
at ../../../glib/gmain.c:4346
#2 g_main_context_iterate (context=context@entry=0x7fed74000c20,
block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at
../../../glib/gmain.c:4042
#3 0x00007fed9b00f4a3 in g_main_context_iteration (context=0x7fed74000c20,
may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#4 0x00007fed9d3f7842 in QEventDispatcherGlib::processEvents
(this=0x7fed74000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5 0x00007fed9d39baeb in QEventLoop::exec (this=this@entry=0x7fed877fdbe0,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#6 0x00007fed9d1b5322 in QThread::exec (this=<optimized out>) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#7 0x00007fed9d1b6503 in QThreadPrivate::start (arg=0x5590377dcf10) at
thread/qthread_unix.cpp:331
#8 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#9 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 3 (Thread 0x7fed95ca0700 (LWP 6213)):
#0 futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x559037925be8) at ../sysdeps/nptl/futex-internal.h:183
#1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559037925b98,
cond=0x559037925bc0) at pthread_cond_wait.c:508
#2 __pthread_cond_wait (cond=cond@entry=0x559037925bc0,
mutex=mutex@entry=0x559037925b98) at pthread_cond_wait.c:647
#3 0x00007fed9600db1b in cnd_wait (mtx=0x559037925b98, cond=0x559037925bc0) at
../include/c11/threads_posix.h:155
#4 util_queue_thread_func (input=input@entry=0x559037926cd0) at
../src/util/u_queue.c:294
#5 0x00007fed9600d71b in impl_thrd_routine (p=<optimized out>) at
../include/c11/threads_posix.h:87
#6 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 2 (Thread 0x7fed975d1700 (LWP 6212)):
#0 0x00007fed9ca9faff in __GI___poll (fds=0x7fed900053c0, nfds=3, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fed9b00f36e in g_main_context_poll (priority=<optimized out>,
n_fds=3, fds=0x7fed900053c0, timeout=<optimized out>, context=0x7fed90001ce0)
at ../../../glib/gmain.c:4346
#2 g_main_context_iterate (context=context@entry=0x7fed90001ce0,
block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at
../../../glib/gmain.c:4042
#3 0x00007fed9b00f4a3 in g_main_context_iteration (context=0x7fed90001ce0,
may_block=may_block@entry=1) at ../../../glib/gmain.c:4108
#4 0x00007fed9d3f7842 in QEventDispatcherGlib::processEvents
(this=0x7fed90000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5 0x00007fed9d39baeb in QEventLoop::exec (this=this@entry=0x7fed975d0bb0,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#6 0x00007fed9d1b5322 in QThread::exec (this=this@entry=0x7fed9fa03d80
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#7 0x00007fed9f97ff4b in QDBusConnectionManager::run (this=0x7fed9fa03d80
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
qdbusconnection.cpp:179
#8 0x00007fed9d1b6503 in QThreadPrivate::start (arg=0x7fed9fa03d80 <(anonymous
namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
thread/qthread_unix.cpp:331
#9 0x00007fed9cf9b609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#10 0x00007fed9caac293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 1 (Thread 0x7fed98282680 (LWP 6205)):
#0 0x000055903874aa60 in ?? ()
#1 0x00007fed9d3a60ee in QMetaObject::cast (this=this@entry=0x7fed96dceba0
<KWin::DrmOutput::staticMetaObject>, obj=0x5590384e2b40) at
kernel/qmetaobject.cpp:382
#2 0x00007fed9d3a6129 in QMetaObject::cast (this=this@entry=0x7fed96dceba0
<KWin::DrmOutput::staticMetaObject>, obj=<optimized out>) at
kernel/qmetaobject.cpp:371
#3 0x00007fed96d82d29 in qobject_cast<KWin::DrmOutput*> (object=<optimized
out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject.h:519
#4 KWin::DrmBackend::applyOutputChanges (this=0x559037796bb0, config=...) at
./src/backends/drm/drm_backend.cpp:639
#5 0x00007fed9f74822b in KWin::Platform::requestOutputsChange
(this=0x559037796bb0, config=0x559038881fd0) at ./src/platform.cpp:133
#6 0x00007fed9d3d400e in QtPrivate::QSlotObjectBase::call (a=0x7ffe7ea58120,
r=0x559037782510, this=0x5590377bd1b0) at
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#7 doActivate<false> (sender=0x5590377bd080, signal_index=3,
argv=0x7ffe7ea58120) at kernel/qobject.cpp:3886
#8 0x00007fed9d3cd3d7 in QMetaObject::activate (sender=<optimized out>,
m=m@entry=0x7fed9f3cdb00
<KWaylandServer::OutputManagementV2Interface::staticMetaObject>,
local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe7ea58120)
at kernel/qobject.cpp:3946
#9 0x00007fed9f28ae43 in
KWaylandServer::OutputManagementV2Interface::configurationChangeRequested
(this=<optimized out>, _t1=<optimized out>) at
./obj-x86_64-linux-gnu/src/server/KWaylandServer_autogen/EWIEGA46WW/moc_outputmanagement_v2_interface.cpp:136
#10 0x00007fed9ac38ff5 in ffi_call_unix64 () at ../src/x86/unix64.S:101
#11 0x00007fed9ac3840a in ffi_call_int (cif=<optimized out>, fn=<optimized
out>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>)
at ../src/x86/ffi64.c:669
#12 0x00007fed9c188628 in wl_closure_invoke (closure=0x5590387d9ca0, flags=2,
target=<optimized out>, opcode=5, data=<optimized out>) at
../src/connection.c:1018
#13 0x00007fed9c1849e2 in wl_client_connection_data (fd=<optimized out>,
mask=<optimized out>, data=0x5590387b7ac0) at ../src/wayland-server.c:432
#14 0x00007fed9c18665a in wl_event_loop_dispatch (loop=0x559037792c10,
timeout=timeout@entry=0) at ../src/event-loop.c:1027
#15 0x00007fed9f29da4c in KWaylandServer::Display::dispatchEvents
(this=<optimized out>) at ./src/server/display.cpp:114
#16 0x00007fed9d3d400e in QtPrivate::QSlotObjectBase::call (a=0x7ffe7ea58830,
r=0x5590377cd370, this=0x559037ad36d0) at
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#17 doActivate<false> (sender=0x5590377b24f0, signal_index=3,
argv=0x7ffe7ea58830) at kernel/qobject.cpp:3886
#18 0x00007fed9d3cd3d7 in QMetaObject::activate
(sender=sender@entry=0x5590377b24f0, m=m@entry=0x7fed9d638b40
<QSocketNotifier::staticMetaObject>,
local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe7ea58830)
at kernel/qobject.cpp:3946
#19 0x00007fed9d3d8093 in QSocketNotifier::activated
(this=this@entry=0x5590377b24f0, _t1=..., _t2=<optimized out>, _t3=...) at
.moc/moc_qsocketnotifier.cpp:178
#20 0x00007fed9d3d8833 in QSocketNotifier::event (this=0x5590377b24f0,
e=0x7ffe7ea58b00) at kernel/qsocketnotifier.cpp:302
#21 0x00007fed9dec0dc3 in QApplicationPrivate::notify_helper
(this=this@entry=0x55903777fc30, receiver=receiver@entry=0x5590377b24f0,
e=e@entry=0x7ffe7ea58b00) at kernel/qapplication.cpp:3632
#22 0x00007fed9dec9bb8 in QApplication::notify (this=0x7ffe7ea58f30,
receiver=0x5590377b24f0, e=0x7ffe7ea58b00) at kernel/qapplication.cpp:3156
#23 0x00007fed9d39cfea in QCoreApplication::notifyInternal2
(receiver=0x5590377b24f0, event=0x7ffe7ea58b00) at
../../include/QtCore/5.15.3/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:332
#24 0x00007fed9d3f4a6b in QEventDispatcherUNIXPrivate::activateSocketNotifiers
(this=0x55903778c230) at kernel/qeventdispatcher_unix.cpp:304
#25 0x00007fed9d3f4ecb in QEventDispatcherUNIX::processEvents (this=<optimized
out>, flags=...) at kernel/qeventdispatcher_unix.cpp:511
#26 0x000055903670a321 in
QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
()
#27 0x00007fed9d39baeb in QEventLoop::exec (this=this@entry=0x7ffe7ea58c90,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#28 0x00007fed9d3a3c94 in QCoreApplication::exec () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#29 0x00005590365ecb5c in main (argc=<optimized out>, argv=<optimized out>) at
./src/main_wayland.cpp:727
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