https://bugs.kde.org/show_bug.cgi?id=411444
Bug ID: 411444
Summary: kwin occasionally crashed during wakeup of 4k monitor
Product: kwin
Version: 5.14.5
Platform: Debian stable
OS: Linux
Status: REPORTED
Keywords: drkonqi
Severity: crash
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: bug-repor...@tuta.io
Target Milestone: ---
Application: kwin_x11 (5.14.5)
Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 5.2.0-2-amd64 x86_64
Distribution: Debian GNU/Linux bullseye/sid
-- Information about the crash:
I work with a laptop's internal display and an external 4k monitor connected
via DisplayPort on a docking station. KDE is configured to switch off the
displays after some idle time. When I wake the monitor
sometimes (rough guess: 5% of the time) kwin crashed.
Maybe related: More often (about 30% of the time) the 4k monitor will
succesively "loose" some of its higher resolutions. 2160p and 1440p on the
first sleep, going to 1080i [sic] on the next one. I haven't seen further
degredation though.
The crash can be reproduced sometimes.
-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f689ae7be00 (LWP 8933))]
Thread 6 (Thread 0x7f685c4e3700 (LWP 8941)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x7f68a1664fb8
<QTWTF::pageheap_memory+57592>) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68a1664f68
<QTWTF::pageheap_memory+57512>, cond=0x7f68a1664f90
<QTWTF::pageheap_memory+57552>) at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x7f68a1664f90 <QTWTF::pageheap_memory+57552>,
mutex=0x7f68a1664f68 <QTWTF::pageheap_memory+57512>) at pthread_cond_wait.c:655
#3 0x00007f68a156ee6a in QTWTF::TCMalloc_PageHeap::scavengerThread
(this=0x7f68a1656ec0 <QTWTF::pageheap_memory>) at
../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4 0x00007f68a156ee89 in QTWTF::TCMalloc_PageHeap::runScavengerThread
(context=<optimized out>) at
../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5 0x00007f68a0c63fa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#6 0x00007f68a30c64cf in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 5 (Thread 0x7f6872b9c700 (LWP 8940)):
#0 0x00007f68a30bb916 in __GI_ppoll (fds=fds@entry=0x7f686c000d28,
nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0,
sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1 0x00007f68a1cc23c1 in ppoll (__ss=<optimized out>, __timeout=<optimized
out>, __nfds=<optimized out>, __fds=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f686c000d28) at
kernel/qcore_unix.cpp:132
#3 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f686c000d28) at
kernel/qcore_unix.cpp:129
#4 qt_safe_poll (fds=0x7f686c000d28, nfds=nfds@entry=1,
timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#5 0x00007f68a1cc3839 in QEventDispatcherUNIX::processEvents (this=<optimized
out>, flags=...) at
../../include/QtCore/../../src/corelib/tools/qarraydata.h:209
#6 0x00007f68a1c73cfb in QEventLoop::exec (this=this@entry=0x7f6872b9bc40,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#7 0x00007f68a1ac3d8e in QThread::exec (this=this@entry=0x5620c3bfc690) at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#8 0x00007f68a0484c65 in QQmlThreadPrivate::run (this=0x5620c3bfc690) at
qml/ftw/qqmlthread.cpp:148
#9 0x00007f68a1acda07 in QThreadPrivate::start (arg=0x5620c3bfc690) at
thread/qthread_unix.cpp:367
#10 0x00007f68a0c63fa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007f68a30c64cf in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 4 (Thread 0x7f6890f50700 (LWP 8938)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x5620c261fa38) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x5620c261f9e8,
cond=0x5620c261fa10) at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x5620c261fa10, mutex=0x5620c261f9e8) at
pthread_cond_wait.c:655
#3 0x00007f689144498b in cnd_wait (mtx=0x5620c261f9e8, cond=0x5620c261fa10) at
../include/c11/threads_posix.h:155
#4 util_queue_thread_func (input=input@entry=0x5620c24b47b0) at
../src/util/u_queue.c:272
#5 0x00007f68914445b7 in impl_thrd_routine (p=<optimized out>) at
../include/c11/threads_posix.h:87
#6 0x00007f68a0c63fa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#7 0x00007f68a30c64cf in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 3 (Thread 0x7f68935d1700 (LWP 8937)):
#0 0x00007f68a30bb916 in __GI_ppoll (fds=fds@entry=0x7f6880000d28,
nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0,
sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1 0x00007f68a1cc23c1 in ppoll (__ss=<optimized out>, __timeout=<optimized
out>, __nfds=<optimized out>, __fds=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6880000d28) at
kernel/qcore_unix.cpp:132
#3 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6880000d28) at
kernel/qcore_unix.cpp:129
#4 qt_safe_poll (fds=0x7f6880000d28, nfds=nfds@entry=1,
timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#5 0x00007f68a1cc3839 in QEventDispatcherUNIX::processEvents (this=<optimized
out>, flags=...) at
../../include/QtCore/../../src/corelib/tools/qarraydata.h:209
#6 0x00007f68a1c73cfb in QEventLoop::exec (this=this@entry=0x7f68935d0c40,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#7 0x00007f68a1ac3d8e in QThread::exec (this=this@entry=0x5620c235a720) at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#8 0x00007f68a0484c65 in QQmlThreadPrivate::run (this=0x5620c235a720) at
qml/ftw/qqmlthread.cpp:148
#9 0x00007f68a1acda07 in QThreadPrivate::start (arg=0x5620c235a720) at
thread/qthread_unix.cpp:367
#10 0x00007f68a0c63fa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007f68a30c64cf in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 2 (Thread 0x7f68995ae700 (LWP 8935)):
#0 0x00007f68a30bb916 in __GI_ppoll (fds=fds@entry=0x7f688c00e6b8,
nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0,
sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1 0x00007f68a1cc23c1 in ppoll (__ss=<optimized out>, __timeout=<optimized
out>, __nfds=<optimized out>, __fds=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f688c00e6b8) at
kernel/qcore_unix.cpp:132
#3 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f688c00e6b8) at
kernel/qcore_unix.cpp:129
#4 qt_safe_poll (fds=0x7f688c00e6b8, nfds=nfds@entry=1,
timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#5 0x00007f68a1cc3839 in QEventDispatcherUNIX::processEvents (this=<optimized
out>, flags=...) at
../../include/QtCore/../../src/corelib/tools/qarraydata.h:209
#6 0x00007f68a1c73cfb in QEventLoop::exec (this=this@entry=0x7f68995adc30,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#7 0x00007f68a1ac3d8e in QThread::exec (this=this@entry=0x7f689ffcbd60
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#8 0x00007f689ff4c545 in QDBusConnectionManager::run (this=0x7f689ffcbd60
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
qdbusconnection.cpp:178
#9 0x00007f68a1acda07 in QThreadPrivate::start (arg=0x7f689ffcbd60 <(anonymous
namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
thread/qthread_unix.cpp:367
#10 0x00007f68a0c63fa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007f68a30c64cf in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 1 (Thread 0x7f689ae7be00 (LWP 8933)):
[KCrash Handler]
#6 QXcbConnection::updateScreens (this=this@entry=0x5620c2170b50,
event=event@entry=0x7f689402cb90) at qxcbconnection.cpp:295
#7 0x00007f689a9dde8b in QXcbConnection::handleXcbEvent
(this=this@entry=0x5620c2170b50, event=event@entry=0x7f689402cb90) at
qxcbconnection.cpp:1210
#8 0x00007f689a9de843 in QXcbConnection::processXcbEvents
(this=0x5620c2170b50) at qxcbconnection.cpp:1790
#9 0x00007f68a1c9ed62 in QObject::event (this=0x5620c2170b50, e=<optimized
out>) at kernel/qobject.cpp:1251
#10 0x00007f68a25f1501 in QApplicationPrivate::notify_helper
(this=this@entry=0x5620c2137680, receiver=receiver@entry=0x5620c2170b50,
e=e@entry=0x7f6894035380) at kernel/qapplication.cpp:3726
#11 0x00007f68a25f89b0 in QApplication::notify (this=0x7ffe3477c9e0,
receiver=0x5620c2170b50, e=0x7f6894035380) at kernel/qapplication.cpp:3485
#12 0x00007f68a1c75029 in QCoreApplication::notifyInternal2
(receiver=0x5620c2170b50, event=0x7f6894035380) at
../../include/QtCore/5.11.3/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:307
#13 0x00007f68a1c7800b in QCoreApplication::sendEvent (event=0x7f6894035380,
receiver=<optimized out>) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#14 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0,
data=0x5620c2140d00) at kernel/qcoreapplication.cpp:1744
#15 0x00007f68a1cc36ab in QEventDispatcherUNIX::processEvents
(this=0x5620c21b9140, flags=...) at kernel/qeventdispatcher_unix.cpp:466
#16 0x00007f689aa7262d in QUnixEventDispatcherQPA::processEvents
(this=<optimized out>, flags=...) at qunixeventdispatcher.cpp:68
#17 0x00007f68a1c73cfb in QEventLoop::exec (this=this@entry=0x7ffe3477c8f0,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:140
#18 0x00007f68a1c7bcd2 in QCoreApplication::exec () at
../../include/QtCore/../../src/corelib/global/qflags.h:120
#19 0x00007f68a319847b in kdemain (argc=<optimized out>, argv=0x7ffe3477cb78)
at ./main_x11.cpp:468
#20 0x00007f68a2ff109b in __libc_start_main (main=0x5620c1940050 <main>,
argc=2, argv=0x7ffe3477cb78, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffe3477cb68) at ../csu/libc-start.c:308
#21 0x00005620c194008a in _start ()
[Inferior 1 (process 8933) detached]
Possible duplicates by query: bug 400009.
Reported using DrKonqi
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