Hi all,

First post so be kind!!

I am using Ubuntu Lucid 10.04 and wanted to try out the KDE desktop as I was becoming bored with GNOME.

Trouble is I keep getting the following error message whenever I try and open any form of file manager (Dolphin, Konqueror etc) or use any application that has to access the file system.

Error Message:
Unable to start process. Unable to create io-slave. klauncher said: Error loading 'kio_file'

I am currently using KDE Version 4.5.1.

I have googled for a solution but have not found anything that has helped!!

Anybody able to point me in the right direction as I would really love to be able to use KDE.

Thanks for the help.

did you see this http://kubuntuforums.net/forums/index.p ... =3110214.0 ?

Thanks for the super quick reply.

Yes sure did, my fstab looks a little different but I could not see anything out of the ordinary.

Below is my fstab

Code: Select all

# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc   /proc   proc   nodev,noexec,nosuid   0   0
#Entry for /dev/sdb5 :
UUID=b1b09572-dce6-4fb7-b57c-89ad2d615974   /   ext4   errors=remount-ro   0   1
##Entry for /dev/sdb1 :
UUID=D8C2C1DFC2C1C1CC   /media/The_Big_Bloke   ntfs-3g   defaults,locale=en_AU.utf8   0   0
#Entry for /dev/sdb6 :
UUID=dd2a7af7-8c57-413f-8542-eca99775e741   none   swap   sw   0   0



Also checked my fs.file-max value in sysctl and that looks fine, when I issue cat /proc/sys/fs/file-max it returns a value of 65536.

Any suggestions re my fstab??

nothing obvious to your problem but you really should consider creating a separate /home partition at some point - it's just a better practice to keep data separate from the system especially if at some point if you need to reinstall Linux or want to try/install a different distro.

Took your advice and created a new partition for my /home data.

New fstab looks like this now

Code: Select all

# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc   /proc   proc   nodev,noexec,nosuid   0   0
#Entry for /dev/sdb5 :
UUID=b1b09572-dce6-4fb7-b57c-89ad2d615974   /   ext4   errors=remount-ro   0   1
##Entry for /dev/sdb1 :
UUID=D8C2C1DFC2C1C1CC   /media/The_Big_Bloke   ntfs-3g   defaults,locale=en_AU.utf8   0   0
#Entry for /dev/sdb6 :
UUID=dd2a7af7-8c57-413f-8542-eca99775e741   none   swap   sw   0   0
#Entry for /dev/sda3 :
UUID=9ada0a32-af03-433f-a464-22a7d0cbc7a9   /home    ext4          auto,users,rw,exec,noatime      0       2

Still getting the same error with most KDE apps and able to create io-slave!!

Really frustrating because it makes KDE virtually useless for me

Even found a listing of all KDE packages that are installed and removed them all and reinstalled the latest KDE but I am still getting the same errors.

Can you please verify the presence of the following files:
/usr/lib/kde4/kio_file.so
/usr/share/kde4/services/file.protocol

If they are missing, there is a severe issue with your KDE installation.
If they are present, please try running the following commands:

Code: Select all

kbuildsycoca4 --noincremental
killall klauncher
rm -f /tmp/ksocket-$USER/klauncher*.slave-socket
kdeinit4 &

Thank you for your reply.

bcooksley wrote:Can you please verify the presence of the following files:
/usr/lib/kde4/kio_file.so
/usr/share/kde4/services/file.protocol

I can confirm both kio_file.so & file.protocol exist in the mentioned locations.

I have run the commands you listed and received the following output:

Code: Select all

root@HomePC1:/home/lambchops/Documents# kbuildsycoca4 --noincremental
kbuildsycoca4 running...
kbuildsycoca4(2154) KBuildMimeTypeFactory::createEntry: Missing <comment> field in "application/x-note.xml"
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry MimeType in "/usr/share/applications/abiword.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/gcalctool.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/ntfs-config.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry MimeType in "/usr/share/applications/gdesklets.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/drapes.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry MimeType in "/usr/share/applications/mousepad.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154)/kdecore (services) KServicePrivate::init: The desktop entry file "/usr/share/applications/kde/kresources.desktop" has Type= "Application" but also has a X-KDE-Library key. This works for now, but makes user-preference handling difficult, so support for this might be removed at some point. Consider splitting it into two desktop files.
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/glblur.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/fiberlamp.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/glslideshow.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/gltext.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/glmatrix.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/antspotlight.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/glschool.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/fuzzyflakes.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/hypertorus.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(2154) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/screensavers/glcells.desktop" is not compliant with XDG standard (missing trailing semicolon).
root@HomePC1:/home/lambchops/Documents# killall klauncher
root@HomePC1:/home/lambchops/Documents# rm -f /tmp/ksocket-$USER/klauncher*.slave-socket
root@HomePC1:/home/lambchops/Documents# kdeinit4 &
[1] 2274
root@HomePC1:/home/lambchops/Documents# Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
QMetaObject::invokeMethod: No such method KUniqueApplication::loadCommandLineOptionsForNewInstance()
kbuildsycoca4 running...

[1]+  Done                    kdeinit4


Rebooted... Crossed my fingers.... Error still persists within all KDE apps

Should I remove all non-complaint entries mentioned above??

Thanks again for your reply anything else you can suggest from the output above?

Do not remove those files, those error messages are largely harmless.

Do you normally run as root? If not, those commands need to be run as your user to work properly.

OMG how stupid of me!!!!!

Thank you so so much!! Ran all commands through normal terminal and SUCCESS!!

All KDE apps now function correctly and the io-slave error is gone

Thank you for taking the time to help me out I really appreciate your help. You ROCK!!

After rebooting tonight and logging back into KDE I have again received the io-slave error in all KDE apps.

The commands I used before worked again and removed the error. Is there any way to run these automatically or is there something else I can do that can correct this permanently??

Thanks again for the help.

This should definitely not be occurring.

Can you please add the following to ~/.kde/env/debug-data.sh? Make sure the file is executable.

Code: Select all

kde4-config --path lib >> ~/kde-startup-info
kde4-config --path services >> ~/kde-startup-info
echo $KDEDIRS >> ~/kde-startup-info
echo $PATH >> ~/kde-startup-info

Then run the following commands in a Konsole, both before and after applying the fix I supplied earlier:

Code: Select all

kde4-config --path lib
kde4-config --path services
echo $KDEDIRS
echo $PATH

Then pastebin the contents of ~/kde-startup-info and the two runs of the above commands and post it here.

Thanks again for your help sorry for the delay in my reply I have been away.

Below is the output to the commands prior to the the fix with the io-slave error present:

Code: Select all

lambchops@HomePC1:~$ kde4-config --path lib
/home/lambchops/.kde/lib/:/usr/lib/
lambchops@HomePC1:~$ kde4-config --path services
/home/lambchops/.kde/share/kde4/services/:/usr/share/kde4/services/
lambchops@HomePC1:~$ echo $KDEDIRS

lambchops@HomePC1:~$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
lambchops@HomePC1:~$

Now is the output once the fix is applied and the io-slave error is gone:

Code: Select all

lambchops@HomePC1:~$ kde4-config --path lib
/home/lambchops/.kde/lib/:/usr/lib/
lambchops@HomePC1:~$ kde4-config --path services
/home/lambchops/.kde/share/kde4/services/:/usr/share/kde4/services/
lambchops@HomePC1:~$ echo $KDEDIRS

lambchops@HomePC1:~$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
lambchops@HomePC1:~$


Now the contents of kde-startup-info:

Code: Select all

/home/lambchops/.kde/lib/:/usr/lib/
/home/lambchops/.kde/lib/:/usr/lib/
/home/lambchops/.kde/share/kde4/services/:/usr/share/kde4/services/

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games


Pastebin address:
http://pastebin.com/0WsUrSfP

I hope that was what you meant with the pastebin thing..

Ok, that rules out environment variables changing...

Does this happen under a new user?

Just created a new user account and the error persists with the new account as well.

Can you please check for files named "file.protocol" under /usr/share? There should only be one.