https://bugs.kde.org/show_bug.cgi?id=415008
Vojtěch Král <vojt...@kral.hk> changed:
What |Removed |Added
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CC| |vojt...@kral.hk
--- Comment #5 from Vojtěch Král <vojt...@kral.hk> ---
Hi,
it seems I'm having a very similar problem on my system.
However, in my case, this only happens upon logout and there's no noticeable
CPU comsumption.
After I log out of KDE, sometimes (about 10% cases) there will be a hanging
kwin_x11 process left behind, which is stuck in QXcbConnection::getTimestamp()
and needs to be SIGKILLed (SIGTERM won't help). If not killed, the next login
will lead to botched session where kwin and plasma fail to start, but krunner
and other session components work.
Backtrace of kwin_x11 when stuck after logout:
#0 0x00007f456f3fcf04 in QXcbConnection::getTimestamp() () at
/usr/lib/libQt5XcbQpa.so.5
#1 0x00007f456f418663 in QXcbNativeInterface::getTimestamp(QXcbScreen const*)
() at /usr/lib/libQt5XcbQpa.so.5
#2 0x00007f456f4194e4 in
QXcbNativeInterface::nativeResourceForScreen(QByteArray const&, QScreen*) () at
/usr/lib/libQt5XcbQpa.so.5
#3 0x00007f457651b9c7 in QX11Info::getTimestamp() () at
/usr/lib/libQt5X11Extras.so.5
#4 0x00007f45768e4619 in KWin::Platform::updateXTime() () at
/usr/lib/libkwin.so.5
#5 0x00007f457689f2ec in KWin::Workspace::workspaceEvent(xcb_generic_event_t*)
() at /usr/lib/libkwin.so.5
#6 0x00007f457550ec67 in
QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) ()
at /usr/lib/libQt5Core.so.5
#7 0x00007f456f3fb703 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*)
() at /usr/lib/libQt5XcbQpa.so.5
#8 0x00007f456f3fcc79 in
QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5XcbQpa.so.5
#9 0x00007f456f42006e in () at /usr/lib/libQt5XcbQpa.so.5
#10 0x00007f457551013c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#11 0x00007f45755185c4 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#12 0x000055e39cfc6412 in ()
#13 0x00007f4574eb5002 in __libc_start_main () at /usr/lib/libc.so.6
#14 0x000055e39cfc694e in _start ()
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