Red Hat Bugzilla – Bug 2422
xntpd gets confused by suspend/resume
Last modified: 2015-01-07 18:37:00 EST
Since xntpd doesn't run during suspend, a resume will cause
what appears to be a time difference that is too great to
correct by stepping, then it exits.
XNTP3 was never designed to work in apmd suspend/resume environments.
You might try running ntpdate -s periodically from cron which should
give you most of the benefits of XNTP w/o running xntpd.