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Re: [kde-linux] centos 6.4 x64 can not login to kde, Could not start D-Bus. Can you Call qdbus?

On 07/08/2013 05:32 AM, Han Jiang wrote:
hello all, just did an upgrade from 6.3. to 6.4, i found that i can not
log into kde.
after selecting kde at login screen, it shows an ugly window saying
Could not start D-Bus. Can you Call qdbus?

Well, I should first ask which login screen. Is it a GUI login screen? Is it the KDE login screen. Presuming that the answer to both is yes:

and only one ok button, if i click it, it returns to login screen.

gnome desktop is fine though.

And you logged into the GNOME desktop through the same login screen?

how can i fix it ? thanks !

the error is :

startkde: Starting up...
/usr/bin/startkde: line 283: 12207 Segmentation fault (core dumped)
qdbus > /dev/null 2> /dev/null
startkde: Could not start D-Bus. Can you call qdbus?
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset

Well, if you look at the: "startkde" script at line 283 we find the error message and just above:

if test -z "$DBUS_SESSION_BUS_ADDRESS" ; then
    eval `dbus-launch --sh-syntax --exit-with-session`
if qdbus >/dev/null 2>/dev/null; then
    : # ok

Now, you have two possibilities.  Either:

eval `dbus-launch --sh-syntax --exit-with-session`

failed.  Or:

if qdbus >/dev/null 2>/dev/null;


Since GNOME worked. I would think that it is the second one that is the problem.

already tried:
reinstall  "X Window System"
yum install qt qt-demos qt-designer qt4 qt4-designer PyQt4


Now you said that you tried:

export QTDIR=/usr/lib/qt4
export PATH=$QTDIR/bin:$PATH

But, where did you try them? These should be on your system somewhere (although I am not sure that the second one is correct, but it is your system so you are the one that knows -- just check it to be sure). These need to be in a file for them to be executed every time the system boots. The file should be named:


and if your system is normal, it should go in the directory:


You can also look in: /etc/profile and see if there is a function for prepending paths to a path string. If so, you can use that for adding to your PATH instead of the way you did it. That is, on the LFS/BLFS distro it would be, FOR EXAMPLE:

	pathprepend $QTDIR/bin

I don't think that this has been standardized; so it will be different for your distro.

James Tyrer

Linux (mostly) From Scratch
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