Best way to debug KDE process crashes

I've got a relatively fresh install of ARCH with KDE running. However every time I reboot and log in I immediately get 2 pop-ups stating that KMix and a KDE Deamon closed unexpectedly. The "executable" for both is listed as kdenitit4. I'm assuming that is the app that started the failed process? Checking the PIDs for each in the process list before closing the pop-ups show kmix and kded4 as the actual stopped processes.
Question then, what is the best way to debug this. I know there are system logs but I'm really not that familiar with where or what to look for and really want to learn and also fix the crashes :-) What is the best way to start. Thanks,
John.........

Here is some of the lines around the 2 KCrash errors:
Known subscriber "AkonadiAgentServer" subscribes again
void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.48", ":1.47")
Known subscriber "AkonadiAgentServer" subscribes again
void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.48", ":1.47", ":1.49")
Database "akonadi" opened using driver "QMYSQL"
Database "akonadi" opened using driver "QMYSQL"
Known subscriber "AkonadiAgentServer" subscribes again
void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.48", ":1.47", ":1.49", ":1.46")
plasma-desktop(889)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
>> KCrash: Attempting to start /usr/bin/kded4 from kdeinit
knotify(887)/phonon (KDE plugin): QDBusError("org.freedesktop.DBus.Error.NoReply", "Message did not receive a reply (timeout by message bus)")
korgac(944)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed: "The name org.kde.kded was not provided by any .service files"
knotify(887)/phonon (KDE plugin): QDBusError("org.freedesktop.DBus.Error.ServiceUnknown", "The name org.kde.kded was not provided by any .service files")
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
kdeinit4: hcontrol.c:764: snd_hctl_handle_event: Assertion `elem' failed.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
>> KCrash: Application 'kded4' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
[0x2853108] main input error: ES_OUT_RESET_PCR called
KCrash: Application 'kmix' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
Known subscriber "akonadi_maildispatcher_agent" subscribes again
Known subscriber "akonadi_maildispatcher_agent" subscribes again
Agent instance created in separate process.
I marked the original two KCrash's with >> to make them easier to find. Looking a few lines down from the 2nd one I also see a KCrash for 'kmix' which is also part of the problem. Don't really see anything else interesting. Open to ideas. Thanks,
John...........

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