Bug 329332

Created attachment 84310 [details]
Call stack during delay.

I guess it means that Webkit is checking network status by QNetworkConfigurationManager during that time.

Better backtrace from Shadeslayer

Thread 2 (Thread 0x7f18225c5700 (LWP 17755)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f1835a3c3bd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f1835a3c3f9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f183992e182 in start_thread (arg=0x7f18225c5700) at pthread_create.c:312
#4  0x00007f183a5d2b2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
 
Thread 1 (Thread 0x7f183e75a7c0 (LWP 17754)):
#0  0x00007f183a5c571d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f18338654b8 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#2  0x00007f18338643ff in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#3  0x00007f183384e9dc in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#4  0x00007f183384f389 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#5  0x00007f183384f94d in dbus_connection_send_with_reply_and_block () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#6  0x00007f183b880890 in q_dbus_connection_send_with_reply_and_block (error=0x7fff1ff32a80, timeout_milliseconds=-1, message=0x25ca0d0, connection=<optimized out>)
    at qdbus_symbols_p.h:135
#7  QDBusConnectionPrivate::sendWithReply (this=this@entry=0x2230930, message=..., sendMode=sendMode@entry=1, timeout=timeout@entry=-1) at qdbusintegrator.cpp:1912
#8  0x00007f183b882622 in QDBusConnectionPrivate::findMetaObject (this=0x2230930, service=..., path=..., interface=..., error=...) at qdbusintegrator.cpp:2386
#9  0x00007f183b88dc0b in QDBusInterfacePrivate::QDBusInterfacePrivate (this=0x27d4690, serv=..., p=..., iface=..., con=...) at qdbusinterface.cpp:158
#10 0x00007f183b88dd35 in QDBusInterface::QDBusInterface (this=0x23ff910, service=..., path=..., interface=..., connection=..., parent=0x0) at qdbusinterface.cpp:220
#11 0x00007f183e1ba0c6 in KSystemTimeZonesPrivate::instance () at ../../kdecore/date/ksystemtimezone.cpp:304
#12 0x00007f183e1bb009 in KSystemTimeZones::local () at ../../kdecore/date/ksystemtimezone.cpp:201
#13 0x00007f183e1a0e3d in KDateTime::Spec::setType (this=0x7fff1ff32e80, type=<optimized out>, utcOffset=<optimized out>) at ../../kdecore/date/kdatetime.cpp:170
#14 0x00007f183e1abace in KDateTimeFormatter::formatDate (this=this@entry=0x7fff1ff32f00, fromDate=..., toFormat=..., calendar=calendar@entry=0x27be930, locale=0x2380330,
    digitSet=digitSet@entry=KLocale::ArabicDigits, formatStandard=formatStandard@entry=KLocale::KdeFormat) at ../../kdecore/date/kdatetimeformatter.cpp:59
#15 0x00007f183e18ee1f in KCalendarSystem::formatDate (this=this@entry=0x27be930, fromDate=..., toFormat=..., digitSet=KLocale::ArabicDigits,
    formatStandard=formatStandard@entry=KLocale::KdeFormat) at ../../kdecore/date/kcalendarsystem.cpp:2107
#16 0x00007f183e18ee6e in KCalendarSystem::formatDate (this=this@entry=0x27be930, fromDate=..., toFormat=..., standard=KLocale::KdeFormat)
    at ../../kdecore/date/kcalendarsystem.cpp:2095
#17 0x00007f183e18efdc in KCalendarSystem::formatDate (this=0x27be930, fromDate=..., toFormat=<optimized out>) at ../../kdecore/date/kcalendarsystem.cpp:2086
#18 0x00007f183e2830cf in KLocalePrivate::formatDate (this=<optimized out>, date=..., format=KLocale::LongDate) at ../../kdecore/localization/klocale_kde.cpp:1859
#19 0x00007f183e282691 in KLocale::formatDate (this=<optimized out>, date=..., format=<optimized out>) at ../../kdecore/localization/klocale.cpp:370
#20 0x00007f183bfe27af in AdiumThemeView::replaceHeaderKeywords(QString, AdiumThemeHeaderInfo const&) () from /usr/lib/libktpchat.so.0
#21 0x00007f183bfe3c76 in AdiumThemeView::initialise(AdiumThemeHeaderInfo const&) () from /usr/lib/libktpchat.so.0
#22 0x00007f183bfd8215 in ChatWidget::initChatArea() () from /usr/lib/libktpchat.so.0
#23 0x00007f183bfd8c2c in ChatWidget::ChatWidget(Tp::SharedPtr<Tp::TextChannel> const&, Tp::SharedPtr<Tp::Account> const&, QWidget*) () from /usr/lib/libktpchat.so.0
#24 0x0000000000418551 in _start ()

On Rohan's machine the lock was caused by appmenu, the tool to put window titles in the application menu bar.

kded (where kded resides) sends a blocking call to us for the window data, we send one of two blocking calls to the kded:
 - kdatetime asking for the time
 - khtml asks if we have network access.

KDED should never ever ever ever send a blocking call, so it's app menu in the wrong. I believe I have a patch; but need someone to test.

See also bug 331439.

David, if you have a patch, open a review request :)

I'm having this problem on KDE 4.14.2, KDE Telepathy 0.9 on Kubuntu 14.04 LTS. I use application menus on the top of the screen.

The problem went away when I changed the setting for application menus to show up in the application itself.

*** Bug 340695 has been marked as a duplicate of this bug. ***

This problem is still present with KDE 4.14.2 and ktp 0.9 on Kubuntu 14.10.

This should now be fixed with 15.08.

Please reopen if you still have issues with the latest version.

Thanks

I forgot to mention 15.08 _and_ Plasma 5.3.