Meanwhile I had installed Ubuntu: As the unity desktop is not my thing I installed Xubuntu again and found two reasons for the time leaks in the syslog, but not at the same starts of OS.
1. Setting of IPv6 in the networkmanager. I set it to 'ignore'. 2. NTP Server in 'ntp.conf'. I changed it to this: server ptbtime1.ptb.de server ptbtime2.ptb.de server ptbtime3.ptb.de # Use Ubuntu's ntp server as a fallback. # server de.pool.ntp.org Since deactivating the fallback server Xubuntu starts without loop about fifty times till now. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to ntp in Ubuntu. https://bugs.launchpad.net/bugs/1015041 Title: Conflict between NTP and NTPDATE To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1015041/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs