I ran into this too but on Ubuntu and filed [1] before noticing this Debian bug.
I believe that [2, also attached here] might be a simple yet working solution. It changes the initscript to use /var/lib/ntp/ntp.conf.dhcp only if it is newer than /etc/ntp.conf. This should keep the dhclient hook script working as it always updates the ntp.conf.dhcp file when a NTP server is advertised via DHCP. Regards, Simon 1: https://bugs.launchpad.net/debian/+source/ntp/+bug/1472056 2: https://bugs.launchpad.net/debian/+source/ntp/+bug/1472056/+attachment/4425385/+files/ntp-dont-use-stale-dhcp-conf.patch
--- /etc/init.d/ntp.orig 2015-07-06 22:21:33.666670136 -0400 +++ /etc/init.d/ntp 2015-07-06 22:55:01.128497327 -0400 @@ -22,7 +22,7 @@ . /etc/default/ntp fi -if [ -e /var/lib/ntp/ntp.conf.dhcp ]; then +if [ /var/lib/ntp/ntp.conf.dhcp -nt /etc/ntp.conf ]; then NTPD_OPTS="$NTPD_OPTS -c /var/lib/ntp/ntp.conf.dhcp" fi
