https://bugs.kde.org/show_bug.cgi?id=413128
Bug ID: 413128
Summary: kwin_x11 --reload -- CoreDump
Product: kwin
Version: 5.16.5
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: nroycea+...@gmail.com
Target Milestone: ---
SUMMARY
kwin_x11 was pegged at 100% and the GUI was somewhat unresponsive (mouse cursor
still moved).
"$ kwin_x11 --replace" resulted in a coredump.
STEPS TO REPRODUCE
1. Normal every day use.
OBSERVED RESULT
Coredump
EXPECTED RESULT
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.62.0
Qt Version: 5.13.1
ADDITIONAL INFORMATION
While I was browsing in Chrome, action responses froze.
I could move my mouse around, but there would be no action from any clicking or
even ALT-Tab.
I switched terminals (luckily?), and saw kwin_x11 was pegged at 100% CPU usage,
and bouncing around among the cores.
I tried to "$ kwin_x11 --replace", but after a short wait, there was a
coredump:
*****
Oct 17 21:51:31 computername systemd-coredump[1598113]: Process 1598070
(kwin_x11) of user 1000 dumped core.
Stack trace of thread
1598078:
#0 0x00007b753249af25 raise
(libc.so.6)
#1 0x00007b75320f26b0
_ZN6KCrash19defaultCrashHandlerEi (libKF5Crash.so.5)
#2 0x00007b753249afb0
__restore_rt (libc.so.6)
#3 0x00007b753249af25 raise
(libc.so.6)
#4 0x00007b7532484897 abort
(libc.so.6)
#5 0x00007b7530e2c8f8
_ZNK14QMessageLogger5fatalEPKcz (libQt5Core.so.5)
#6 0x00007b7529374cec n/a
(KWinX11Platform.so)
#7 0x00007b7531061b70
_ZN11QMetaObject8activateEP7QObjectiiPPv (libQt5Core.so.5)
#8 0x00007b753106eb78
_ZN6QTimer7timeoutENS_14QPrivateSignalE (libQt5Core.so.5)
#9 0x00007b75310623e5
_ZN7QObject5eventEP6QEvent (libQt5Core.so.5)
#10 0x00007b75319f14f5
_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5)
#11 0x00007b75319fae11
_ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5)
#12 0x00007b75310359c2
_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
#13 0x00007b753108cd9d
_ZN14QTimerInfoList14activateTimersEv (libQt5Core.so.5)
#14 0x00007b753108b169
_ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5)
#15 0x00007b75310344ec
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
#16 0x00007b7530e66385
_ZN7QThread4execEv (libQt5Core.so.5)
#17 0x00007b7530e675b0 n/a
(libQt5Core.so.5)
#18 0x00007b752ffd54cf
start_thread (libpthread.so.0)
#19 0x00007b753255e2d3
__clone (libc.so.6)
Stack trace of thread
1598074:
#0 0x00007b752ffdbf7a
pthread_cond_timedwait@@GLIBC_2.3.2 (libpthread.so.0)
#1 0x00007b7530e6d5cc
_ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5)
#2 0x00007b7530e6d719
_ZN14QWaitCondition4waitEP6QMutexm (libQt5Core.so.5)
#3 0x00007b7530e6ab9b n/a
(libQt5Core.so.5)
#4 0x00007b7530e675b0 n/a
(libQt5Core.so.5)
#5 0x00007b752ffd54cf
start_thread (libpthread.so.0)
#6 0x00007b753255e2d3
__clone (libc.so.6)
Stack trace of thread
1598071:
#0 0x00007b75325539ef __poll
(libc.so.6)
#1 0x00007b7530d87630 n/a
(libxcb.so.1)
#2 0x00007b7530d892db
xcb_wait_for_event (libxcb.so.1)
#3 0x00007b752a0d6101 n/a
(libQt5XcbQpa.so.5)
#4 0x00007b7530e675b0 n/a
(libQt5Core.so.5)
#5 0x00007b752ffd54cf
start_thread (libpthread.so.0)
#6 0x00007b753255e2d3
__clone (libc.so.6)
Stack trace of thread
1598070:
#0 0x00007b752ffdbc45
pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
#1 0x00007b7530d8783b n/a
(libxcb.so.1)
#2 0x00007b7530d88fef n/a
(libxcb.so.1)
#3 0x00007b7530d89162
xcb_wait_for_reply64 (libxcb.so.1)
#4 0x00007b752ef20269
_XReply (libX11.so.6)
#5 0x00007b752d551aa4 n/a
(libGLX.so.0)
#6 0x00007b752d551bfc n/a
(libGLX.so.0)
#7 0x00007b752d550708 n/a
(libGLX.so.0)
#8 0x00007b752d550c28 n/a
(libGLX.so.0)
#9 0x00007b752d54cab3
glXGetClientString (libGLX.so.0)
#10 0x00007b75280d7803 n/a
(libqxcb-glx-integration.so)
#11 0x00007b75280d8199 n/a
(libqxcb-glx-integration.so)
#12 0x00007b7529373310
_ZN4KWin21X11StandalonePlatform19createOpenGLBackendEv (KWinX11Platform.so)
#13 0x00007b751ada3422
_ZN4KWin11SceneOpenGL11createSceneEP7QObject (KWinSceneOpenGL.so)
#14 0x00007b751ada6bdb
_ZNK4KWin13OpenGLFactory6createEP7QObject (KWinSceneOpenGL.so)
#15 0x00007b75322c3015
_ZN4KWin10Compositor33slotCompositingOptionsInitializedEv (libkwin.so.5)
#16 0x00007b75322c3fdc
_ZN4KWin10Compositor5setupEv (libkwin.so.5)
#17 0x00007b753106244a
_ZN7QObject5eventEP6QEvent (libQt5Core.so.5)
#18 0x00007b75319f14f5
_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5)
#19 0x00007b75319fae11
_ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5)
#20 0x00007b75310359c2
_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
#21 0x00007b7531038739
_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData
(libQt5Core.so.5)
#22 0x00007b753108ada5
_ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5)
#23 0x00007b752a0d74df n/a
(libQt5XcbQpa.so.5)
#24 0x00007b75310344ec
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
#25 0x00007b753103c326
_ZN16QCoreApplication4execEv (libQt5Core.so.5)
#26 0x00007b753262f588
kdemain (libkdeinit5_kwin_x11.so)
#27 0x00007b7532486153
__libc_start_main (libc.so.6)
#28 0x000058f2a7e2605e _start
(kwin_x11)
Stack trace of thread
1598077:
#0 0x00007b7532553ae6 ppoll
(libc.so.6)
#1 0x00007b7531089973
_Z12qt_safe_pollP6pollfdmPK8timespec (libQt5Core.so.5)
#2 0x00007b753108b003
_ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5)
#3 0x00007b75310344ec
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
#4 0x00007b7530e66385
_ZN7QThread4execEv (libQt5Core.so.5)
#5 0x00007b752f75e849 n/a
(libQt5Qml.so.5)
#6 0x00007b7530e675b0 n/a
(libQt5Core.so.5)
#7 0x00007b752ffd54cf
start_thread (libpthread.so.0)
#8 0x00007b753255e2d3
__clone (libc.so.6)
Stack trace of thread
1598072:
#0 0x00007b7532553ae6 ppoll
(libc.so.6)
#1 0x00007b7531089973
_Z12qt_safe_pollP6pollfdmPK8timespec (libQt5Core.so.5)
#2 0x00007b753108b003
_ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5)
#3 0x00007b75310344ec
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
#4 0x00007b7530e66385
_ZN7QThread4execEv (libQt5Core.so.5)
#5 0x00007b752f18cb37 n/a
(libQt5DBus.so.5)
#6 0x00007b7530e675b0 n/a
(libQt5Core.so.5)
#7 0x00007b752ffd54cf
start_thread (libpthread.so.0)
#8 0x00007b753255e2d3
__clone (libc.so.6)
*****
SIGTERM didn't kill the process, but SIGKILL did.
Yes, I'll upgrade to 5.17, but thought this may be something that could very
well have carried over to later versions, and continue to do so if not
addressed (even if it is a fluke).
I am a bit doubtful the coredump would show the cause of the hangup, but rather
the failed attempt at replacing the instance.
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