Description of problem:from start menu, KMix can't be launched; the same when attempting to launch kmix with command line in a terminal:
[alain4@mageia4_64 ~]$ kmix
[alain4@mageia4_64 ~]$
[root@mageia4_64 alain4]# kmix
unnamed app(17977): KUniqueApplication: Cannot find the D-Bus session server:  "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." 

unnamed app(17976): KUniqueApplication: Pipe closed unexpectedly.


Version-Release number of selected component (if applicable):


How reproducible: open the start menu and click: sound and video > KMix
in a terminal: type kmix, as user and as root

notice that the package kmix is installed:
[alain4@mageia4_64 ~]$ rpm -qa kmix
kmix-4.11.4-2.mga4

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Reproducible: 

Steps to Reproduce: