[Bug 1822544] [NEW] System clock miracoulously jumped ahead by one hour overnight

[Karl Kastner]

Public bug reported:

The clock miraculously jumped one hour ahead on my system overnight. Two
nights ago there was the switch to summer time. This went fine, i.e. the
UTC system clock was not changed and the system just added another hour
to interpret it as UTC+2 (CEST). However, this morning I found that over
the next night the UTC system clock was incorrectly advanced by one
hour. The system was suspended, but not rebooted, there is no Windows
installation/virtual machine that could mess with the clock. ntpdate -q
displays the error message "no servers can be used, exiting", but this
cannot explain why the clock jumped ahead. The clock was reset correctly
after I replaced ntp with chrony.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: tzdata 2018i-0ubuntu0.18.04
ProcVersionSignature: Ubuntu 4.10.0-42.46-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Apr  1 10:17:50 2019
InstallationDate: Installed on 2015-11-05 (1242 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
SourcePackage: tzdata
UpgradeStatus: Upgraded to bionic on 2018-05-24 (311 days ago)

** Affects: tzdata (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1822544

Title:
  System clock miracoulously jumped ahead by one hour overnight

Status in tzdata package in Ubuntu:
  New

Bug description:
  The clock miraculously jumped one hour ahead on my system overnight.
  Two nights ago there was the switch to summer time. This went fine,
  i.e. the UTC system clock was not changed and the system just added
  another hour to interpret it as UTC+2 (CEST). However, this morning I
  found that over the next night the UTC system clock was incorrectly
  advanced by one hour. The system was suspended, but not rebooted,
  there is no Windows installation/virtual machine that could mess with
  the clock. ntpdate -q displays the error message "no servers can be
  used, exiting", but this cannot explain why the clock jumped ahead.
  The clock was reset correctly after I replaced ntp with chrony.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: tzdata 2018i-0ubuntu0.18.04
  ProcVersionSignature: Ubuntu 4.10.0-42.46-generic 4.10.17
  Uname: Linux 4.10.0-42-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Mon Apr  1 10:17:50 2019
  InstallationDate: Installed on 2015-11-05 (1242 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: tzdata
  UpgradeStatus: Upgraded to bionic on 2018-05-24 (311 days ago)

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