Hi all,
I don't know if this is a real bug or a package compilation issue from the kubuntu packagers or my configuration problem, but I have a strange issue with dolphin and it's Information Panel: when move the mouse over a large video file (an mkv over 1GB for example) the CPU goes to 100% and even if I shut dolphin, the process dolphin still remain to eating cpu and I have to kill him. There isn't installed any video thumbnailer.
Is this a know problem or maybe I have a configuration issue? This happens also in kde 4.4.85 (beta2). Before open a bug, I'd like to know if others have the same issue.

My system is a kubuntu 10.04 with kde from ppa:kubuntu-ppa/beta with a new generated .kde config dir.

Same with me. I had this problem since beta 2. Just a regular 100mb+ video file will cause such problem. As long as I hover the file, dolphin will be unresponsive for 1 minute or in worst case totally hang and zombified like yours.

Typical .xsession-errors log when hovering

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"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Invalid iterator."
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Invalid iterator."
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Invalid iterator."
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "org.freedesktop.DBus.Error.ServiceUnknown - The name org.kde.nepomuk.services.nepomukstorage was not provided by any .service files"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Unsupported operation (2)": "Invalid model"
"/usr/bin/dolphin(6454)" Error in thread 2940504944 : "Invalid iterator."
dolphin(6454)/KFileMetaInfo KFileMetaInfoPrivate::init: KUrl("file:///home/****/Downloads/videos/****[720p].mkv")
dolphin(6454)/kio (Scheduler) KIO::SchedulerPrivate::jobFinished: KIO::StatJob(0x9818690) KIO::Slave(0x966f940)
dolphin(6454)/kio (Scheduler) KIO::SchedulerPrivate::doJob: KIO::SimpleJob(0x98133d8)
kio_thumbnail(6460) ThumbnailProtocol::get: Wanting MIME Type: "video/x-matroska"
kio_thumbnail(6460) ThumbnailProtocol::get: Guess plugin:  "ffmpegthumbs"
kio_thumbnail(6460)/kio (kioslave) KIO::SlaveBase::mimeType: "application/octet-stream"
dolphin(6454)/kio (Scheduler) KIO::SchedulerPrivate::jobFinished: KIO::TransferJob(0x98133d8) KIO::Slave(0x961db60)
dolphin(6454)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from  "/var/tmp/kdecache-hoa/ksycoca4"
dolphin(6454)/kio (Scheduler) KIO::SchedulerPrivate::doJob: KIO::SimpleJob(0x94a0b78)


when doing the same with a 700mb avi file the log files are pretty much the the same until "dolphin(6454)/KFileMetaInfo KFileMetaInfoPrivate::init: KUrl("file:///home/****/Downloads/videos/****[720p].mkv")" and I see no error messages relating to the avi file

But I am seeing lots of io usage (and some cpu) and iotop is showing:
18421 user 33.91 M/s 0 B/s 0.00 % 94.77 % kdeinit4: dolphin [kdeinit] -icon system-file-manager -caption Dolphin

Moving the mouse or even changing directories in Dolphin doesn't change the usage.

If I close Dolphin I still see the io usage and using system monitor I see dolphin and kio_thumbnail processes still running until I kill the actual Dolphin process

I think you've found a bug with the information panel and video previews and should report it.

Done, Bug ID 243077

I Have similar problem, mine is the HDD go crazy, 11~12 Mb/S (max for my hdd) reporting iotop , and I have to kill dolphin process to stop this. This happends when I open a file, not with mouseover, but not happends always. My cpu usage remains low.

Sometimes when I open some KDE program (kate, dolphin, only KDE programs) it hangs and after a few secons it continues. Only in the open process, once is open there is no problem.

When I open the program in console, it shows this:

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QStringList Solid::Backends::KUPnP::KUPnPManager::findDeviceByDeviceInterface(Solid::DeviceInterface::Type)  error:  "org.freedesktop.DBus.Error.Spawn.ExecFailed"

QStringList Solid::Backends::KUPnP::KUPnPManager::findDeviceByDeviceInterface(Solid::DeviceInterface::Type)  error:  "org.freedesktop.DBus.Error.Spawn.ExecFailed"

QStringList Solid::Backends::KUPnP::KUPnPManager::findDeviceByDeviceInterface(Solid::DeviceInterface::Type)  error:  "org.freedesktop.DBus.Error.Spawn.ExecFailed"

kate(15720)/kdecore (services) KMimeTypeFactory::parseMagic: Now parsing  "/usr/share/mime/magic"
kate(15720)/kdecore (services) KMimeTypeFactory::parseMagic: Now parsing  "/usr/local/share/mime/magic"
kate(15720)/kdecore (services) KMimeTypeFactory::parseMagic: Now parsing  "/home/cau/.local/share/mime/magic


I don't know if this is bad and if this is the reason for the hangs, because this error appears always, but the hangs not.

I'm using KDE 4.5.60 (KDE 4.5.60 >= 20100627) from svn compiled from sources. I'm using Debian testing

Please try disabling the use of Thumbnails in Dolphin's settings.

Problem continues

How many folders do you have in the left side panel? Also, ensure that Thumbnails are not enabled in the open dialog.

I have:

Home
Network
Root
Trash
2 folders
6 links to Hard drives (Partitions)

I observed that all the problems only happends with the Information panel (F11) active. If I close the Information Panel, I don't have any problem.

This is likely related to the retrieval of meta data.

Same bug here on archlinux...

This bug is more serious in KDE 4.5 and now takes place continuously.

http://lists.kde.org/?l=kde-release-tea ... 809498&w=4