No terminal execute só k3b e reporte o erro.
Bom dia
Entrei no TERMINAL e digitei a sua sugestão 'k3b" e o sistema respondeu com as seguintes linhas abaixo:
marcos@marcos-severino:~$ k3b
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/tmp-marcos-severino: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
startkdeinitlock: WARNING: KTempFile: Error trying to create /home/marcos/.kde/tmp-marcos-severino/startkdeinitlockXXXXXX.tmp: Permission denied
startkdeinitlock: WARNING: KTempFile: Error trying to create /home/marcos/.kde/tmp-marcos-severino/startkdeinitlockXXXXXX.tmp: Permission denied
startkdeinitlock: WARNING: KTempFile: Error trying to create /home/marcos/.kde/tmp-marcos-severino/startkdeinitlockXXXXXX.tmp: Permission denied
startkdeinitlock: WARNING: KTempFile: Error trying to create /home/marcos/.kde/tmp-marcos-severino/startkdeinitlockXXXXXX.tmp: Permission denied
startkdeinitlock: WARNING: KTempFile: Error trying to create /home/marcos/.kde/tmp-marcos-severino/startkdeinitlockXXXXXX.tmp: Permission denied
startkdeinitlock: WARNING: KTempFile: Error trying to create /home/marcos/.kde/tmp-marcos-severino/startkdeinitlockXXXXXX.tmp: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/share: Permission denied
trying to create local folder /home/marcos/.kde/socket-marcos-severino: Permission denied
trying to create local folder /home/marcos/.kde/socket-marcos-severino: Permission denied
kdeinit: Aborting. bind() failed: : Permission denied
Could not bind to socket '/home/marcos/.kde/socket-marcos-severino/kdeinit__0'
startkdeinitlock: ERROR: KUniqueApplication: Can't setup DCOP communication.
marcos@marcos-severino:~$
Obrigado pela dica