問題是：
/*****************************
****************
error setting up inter-process communications for kde
could not read network connection list.
/home/***xx/.dcopserver_***x_0
please check the
dcopserver
program is running.
******************************
***************/
解決方法：
1） in terminal run the command:
$ sudo ls ~/.kde -altrh
$ sudo chown -r username:username ~/.kde
=> generally, it can solve the problem.
2） this was fixed by removing the .ice* ａnd .dco* files ａnd rebooting:
$whoami
bob$cd /home/bob
$rm *.iceauthority
$rm *.dcopserver
$su# reboot
these files are recreated in next kde login
3） how to see the port of the connection of vnc.
=> vncserver uses tcp port from 5900:
desktop number: 1 -> 5901
desktop number: 2 -> 5902
....
so in terminal run next command:
$ netstat -na | grep 590
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