I have a trouble with Kubuntu 12.04 (fresh installation, not upgrade). With kdesudo dolphin there are no files/folders in /home and in / only the folders (but they don't open). With sudo dolphin itworks but I can see the error messages:
Error: "/var/tmp/kdecache-paco" is owned by uid 1000 instead of uid 0.
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
Error: "/tmp/ksocket-paco" is owned by uid 1000 instead of uid 0.
"/usr/bin/dolphin(2456)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "QLocalSocket::connectToServer: Invalid name"
Error: "/tmp/kde-paco" is owned by uid 1000 instead of uid 0.
QPixmap::scaled: Pixmap is a null pixmap
QPixmap::scaled: Pixmap is a null pixmap
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
Error: "/tmp/ksocket-paco" is owned by uid 1000 instead of uid 0.
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/kfilemetadatareader(2471)" Soprano: "Invalid iterator."
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(2456)" Soprano: "Invalid iterator."
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(2456)" Soprano: "Invalid iterator."
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "QLocalSocket::connectToServer: Invalid name"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(2456)" Soprano: "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(2456)" Soprano: "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(2456)" Soprano: "Invalid iterator."

Is this a bug?

Thanks.
zoserptah

zoserptah wrote:I have a trouble with Kubuntu 12.04 (fresh installation, not upgrade). With kdesudo dolphin there are no files/folders in /home and in / only the folders (but they don't open).

...

Is this a bug?

It most likely is. The question is if the bug is in KDE or in kdesudo (the latter seems possible, given that "sudo Dolphin" works for you). Unfortunately, I don't have kdesudo here, and it seems it's not even available in the official openSUSE repositories.

About the error messages: I think they are unrelated to the problem, it's just excessive noisyness of Soprano.

I would never recommend running KDE applications directly with "sudo" as you run the severe risk of damaging the permissions, configuration and ownership of your personal KDE preferences and files. This can manifest itself in unusual ways and is not immediately obvious when trouble shooting.

As for why it is not working under "kdesudo" I do not know. Have you tried launching an application such as Konsole with kdesudo, then running Dolphin from there? (command: dolphin)