Hi,

as of today (after installing the latest kernel update) I'm unable to run the following applications: Konsole, Dolphin, Yakuake, Kile,..
Using Linux x86_64 Kubuntu 14.04 (Kernel Version: 3.13.0-48-generic)

Konsole error message:
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
unnamed app(5328): Communication problem with "konsole" , it probably crashed.
Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

Yakuake error message:
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Communication problem with "yakuake" , it probably crashed.
Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

Dolphin/Kile error message:
Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)
Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)

I tried to uninstall/reinstall the applications, but they still fail to launch.

Any suggestions? Thank you in advance!

no idea but couple of questions:
- are there KDE apps that run fine?
- do non-KDE apps run fine?
- these apps when run as a different user do/do not crash?
- was the Kernel the only thing updated?

- are there KDE apps that run fine?
Yes, for instance: kate, gwenview, kcal, ksysgarde,.. they all work fine.

- do non-KDE apps run fine?
yes, as far as I can tell, all my other apps are working fine.
So, instead of Dolphin I am using Krusader and instead of Konsole I am working with Xterm.

- these apps when run as a different user do/do not crash?
These apps do not crash as root, but there are a lot of error messages though:

> kdesudo dolphin &
Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)
Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory
QFileSystemWatcher: failed to add paths: /root/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QObject::connect: Cannot connect (null)::resourceScoreUpdated(QString, QString, QString, double) to NepomukPlugin::resourceScoreUpdated(QString, QString, QString, double)
QObject::connect: Cannot connect (null)::recentStatsDeleted(QString, int, QString) to NepomukPlugin::deleteRecentStats(QString, int, QString)
QObject::connect: Cannot connect (null)::earlierStatsDeleted(QString, int) to NepomukPlugin::deleteEarlierStats(QString, int)
kactivitymanagerd(6648)/nepomuk (library): Could not find virtuoso to connect to. Aborting
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory
QFileSystemWatcher: failed to add paths: /root/.kde/share/config/activitymanager-pluginsrc
QPixmap::scaled: Pixmap is a null pixmap

- was the Kernel the only thing updated?
Yes, I am pretty sure, it was the only thing I changed today.

Do you get a "foobar just crashed" dialog for the failing applications?
In case, check the "developer information" tab for a backtrace - from the list of applications, i'd bet on the konsole part being the troublemaker (it's used in yakuake and dolphin and likely kile as well)

The "error messages" you posted are harm-/meaningless unless there'd be no session dbus daemon (check "ps faux | grep dbus", but I assume there's)

I don't get any kind of crashed dialog, the apps are simply not launching (although they seem to start at the beginning).

Anyway, the session dbus daemon is running.

Can you access the dbus?
Run "qdbus" (maybe "qdbus-qt4") and ensure it doesn't quit with an error but prints a list of services.

Yes, I can access qdbus and it prints a long lists of services. no errors.

Let's see whether you can get a backtrace by hand, but no DrKonqui is fishy enough.

Code: Select all

~/ $ gdb dolphin 2>&1 | tee dolphin.gdb
> run
[waitwaitwait - dolphin crashed]
> bt
[enterenterenter - until you're at the end of the backtrace]
> detach
> quit


And paste dolphin.gdb somewhere.

OK, I followed your instructions and you may find the output file here:
http://supernatti.lima-city.de/temp/dolphin.gdb

Thank you!

I still can't launch these apps.

Is there anything else I could try?

Shot in the dark but try renaming ~/.kde/share/config/yakuakerc and try restarting yakuake from the CLI. Still get the same message? Have you tried kubuntuforums.net? They are a nice and knowledgeable bunch...

Unfortunately it doesn't make any difference. Still not working.
But thanks for the help anyway! Will try kubuntuforums.

in ~/.kde/share/config rename the corresponding rc files, and maybe same for the ~/.kde/share/apps folders

did you try reinstalling Konsole?

note: when testing as a different user using root is not always appropriate though knowing it runs as root can sometime be beneficial

There's an infinite recursion in libkonsoleprivate.so and ColorSchemeManager::findColorScheme() looks *VERY* prone to that.

It's -likely- a problem with the schemes name, archive ~/.kde/share/apps/konsole/ eg.

Code: Select all

mv ~/.kde/share/apps/konsole/ ~/.kde/share/apps/not.konsole/

and best dump

Code: Select all

ls -1 ~/.kde/share/apps/konsole/*

as well as ~/.kde/share/config/konsolepartrc

somewhere. Then file a bug against konsole with that info.

Thank you so much @luebking and @google01103 !!!
Your postings actually solved the problem

And many thanks @all for the great help!