Comment 41 for bug 114505

I just finished a fresh U8.10-rc install.
Plain vanilla, all I added was the NTP package.

    sprinkmeier@u810:~$ ls -l /etc/rc5.d/S2[38]*
    lrwxrwxrwx 1 root root 13 Oct 26 14:18 /etc/rc5.d/S23ntp -> ../init.d/ntp
    lrwxrwxrwx 1 root root 24 Oct 26 10:10 /etc/rc5.d/S28NetworkManager -> ../init.d/NetworkManager

NTP starts before Network Manager, meaning that NTP won't have DNS available at startup.
It tends to work, but moving NTP's startup after Network Managers should make it more reliable. It will also allow NTPDATE to run (it's called from the ip-up scripts, but will fail as NTPD will already own the socket).

    sprinkmeier@u810:~$ grep ntp-server /etc/dhcp3/dhclient.conf
    sprinkmeier@u810:~$

NTP servers still aren't requested by default. If whoever set up your DHCP server knows enought to advertise NTP server(s) then chances are you should use them (or at the very least PREPEND them).