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Unable to start process error!

User avatar LaMbChOpS
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Unable to start process error!

Sat Sep 04, 2010 11:39 am
Hi all,

First post so be kind!! o)

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.

Last edited by LaMbChOpS on Fri Sep 10, 2010 6:31 am, edited 2 times in total.
User avatar google01103
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Re: Unable to start process error!

Sat Sep 04, 2010 12:12 pm


OpenSuse 13.1 x64, KDE 4.12.x

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Re: Unable to start process error!

Sat Sep 04, 2010 12:18 pm
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??
User avatar google01103
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Re: Unable to start process error!

Sat Sep 04, 2010 12:49 pm
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.


OpenSuse 13.1 x64, KDE 4.12.x

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Re: Unable to start process error!

Sun Sep 05, 2010 5:37 am
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.
User avatar bcooksley
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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 &


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User avatar LaMbChOpS
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Re: Unable to start process error!

Sun Sep 05, 2010 12:18 pm
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?
User avatar bcooksley
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Re: Unable to start process error!

Mon Sep 06, 2010 4:31 am
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.


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User avatar LaMbChOpS
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Re: Unable to start process error!

Mon Sep 06, 2010 8:55 am
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 ;D ;D

Thank you for taking the time to help me out I really appreciate your help. You ROCK!! :)
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Re: Unable to start process error!

Tue Sep 07, 2010 12:55 pm
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.
User avatar bcooksley
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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.


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User avatar LaMbChOpS
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Re: Unable to start process error!

Fri Sep 10, 2010 6:51 am
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.. :)
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Re: Unable to start process error!

Fri Sep 10, 2010 8:43 pm
Ok, that rules out environment variables changing...

Does this happen under a new user?


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User avatar LaMbChOpS
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Re: Unable to start process error!

Sat Sep 11, 2010 11:26 am
Just created a new user account and the error persists with the new account as well. :(
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Re: Unable to start process error!

Sat Sep 11, 2010 9:49 pm
Can you please check for files named "file.protocol" under /usr/share? There should only be one.


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