Hi
I am using arch linux. Suddenly a problem has happened with synaptiks. When I try to start "synaptiks", kde gives error:

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KDEInit could not launch '/usr/bin/synaptiks'

When try to run from terminal, it gives following error:

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Segmentation fault (core dumped)

How can I fix it?
PS: few days ago, after upgrade, the kde stopped loading with error "desktop shell could not load" and I fixed it by removing ~/.kde4/share/apps/plasma directory.

try renaming ~/.kde4/share/config/synaptiksrc (or something similar i don't have a touchpad so not sure exact name)

look in ~/session-errors for lines with synaptiks

can you compile synaptiks? either from the source code or from the source package (whatever Arch calls it)

try renaming ~/.kde4/share/config/synaptiksrc (or something similar i don't have a touchpad so not sure exact name)
look in ~/session-errors for lines with synaptiks
can you compile synaptiks? either from the source code or from the source package (whatever Arch calls it)

I have tried both of your suggestions but no luck
Here what i do:
1. rename ~/.kde4/share/config/synaptiksrc to ~/.kde4/share/config/synaptiksrc-bak
then start synaptiks but same error appears.
2. Then I remove synaptiks, all its dependences and all of its configuration files.
3. Then install the synaptiks again but still no luck.
The problem is still appearing

did you look in ~/.xsession-errors?

can you compile it instead of using the binary?

Can you try running the synaptiks command under gdb, to see if you can generate a backtrace?

did you look in ~/.xsession-errors?
can you compile it instead of using the binary?

There is no file named .xsession-erros in my home directory.
pacman -Q synaptiks
show that version 0.8.1-7 is installed. And I am not able to find any source package with the same version! From where i can find?

Can you try running the synaptiks command under gdb, to see if you can generate a backtrace?

Here is the output of gdb:

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root@archbox /]# gdb synaptiks
GNU gdb (GDB) 7.6
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
"/usr/bin/synaptiks": not in executable format: File format not recognized

But 'ls -l' shows that it is exutable!

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root@archbox bin]# ls -l synaptiks*
-rwxr-xr-x 1 root root 304 Aug 18 19:25 synaptiks
-rwxr-xr-x 1 root root 318 Aug 18 19:25 synaptikscfg

This means that it is either corrupt, or a shell script pointing elsewhere.
Try running the "file" command against it and see what it outputs.

This means that it is either corrupt, or a shell script pointing elsewhere.
Try running the "file" command against it and see what it outputs.

Here is the output of 'file'

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[root@archbox~]# file /usr/bin/synaptiks
/usr/bin/synaptiks: Python script, ASCII text executable

what happens if you run

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python /usr/bin/synaptiks

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root@archbox ~]# python /usr/bin/synaptiks
Traceback (most recent call last):
  File "/usr/bin/synaptiks", line 5, in <module>
    from pkg_resources import load_entry_point
ImportError: No module named 'pkg_resources'

this is a guess cause I don't use Arch - try installing python-setuptools, it should include pkg_resources.py,

google01103 wrote:this is a guess cause I don't use Arch - try installing python-setuptools, it should include pkg_resources.py,

still no luck after installation of python-setuptools

same error when you run

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python /usr/bin/synaptiks

google01103 wrote:same error when you run

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python /usr/bin/synaptiks

here is the output:

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root@archbox ~]# python /usr/bin/synaptiks
Traceback (most recent call last):
  File "/usr/bin/synaptiks", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2793, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 673, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 576, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: synaptiks==0.8.1

the upgrade was to KDE 4.11? or to a newer version of Arch?

were you alway running Python 3.3?
do you have Python 2.x also installed? if so try

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 python2 /usr/bin/synaptiks