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[Simon Déziel <1566465@xxxxxxxxxxxxxxxxxx>]

The fix included in 4.4.0-20-generic works well, thanks.

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https://bugs.launchpad.net/bugs/1566465

Title:
  [regression]: Failed to call clock_adjtime(): Invalid argument

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  Steps to reproduce:

  1) Force a time delta
  date -s "now - 1 hour"
  2) Restart systemd-timesyncd to have it fix the time
  systemctl restart systemd-timesyncd

  Expected behavior:

  The clock should be back in sync.

  Actual (problematic) behavior:

  The clock stays out of sync because the call to clock_adjtime()
  failed.

  # systemctl status systemd-timesyncd.service 
  ● systemd-timesyncd.service - Network Time Synchronization
     Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
    Drop-In: /lib/systemd/system/systemd-timesyncd.service.d
             └─disable-with-time-daemon.conf
     Active: active (running) since Tue 2016-04-05 14:26:25 EDT; 1s ago
       Docs: man:systemd-timesyncd.service(8)
   Main PID: 11567 (systemd-timesyn)
     Status: "Synchronized to time server 172.24.21.1:123 (ntp.ubuntu.com)."
      Tasks: 2 (limit: 512)
     Memory: 260.0K
        CPU: 15ms
     CGroup: /system.slice/systemd-timesyncd.service
             └─11567 /lib/systemd/systemd-timesyncd

  Apr 05 14:26:25 simon-laptop systemd[1]: Starting Network Time Synchronization...
  Apr 05 14:26:25 simon-laptop systemd[1]: Started Network Time Synchronization.
  Apr 05 14:26:25 simon-laptop systemd-timesyncd[11567]: Failed to call clock_adjtime(): Invalid argument
  Apr 05 14:26:25 simon-laptop systemd-timesyncd[11567]: Synchronized to time server 172.24.21.1:123 (ntp.ubuntu.com).

  
  This problem doesn't happen when running kernel 4.4.0-16.32. Looking at the changelog of 4.4.0-17.33 it could be because of the new feature introduced in LP: #1519625.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-17-generic 4.4.0-17.33
  ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
  Uname: Linux 4.4.0-17-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  simon      5198 F.... pulseaudio
  CurrentDesktop: Unity
  CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted
  Date: Tue Apr  5 14:21:22 2016
  HibernationDevice: RESUME=/dev/mapper/crypt-swap
  MachineType: LENOVO 2516CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-17-generic root=/dev/mapper/crypt-xroot ro quiet splash cryptopts=target=crypt,source=/dev/sda1,lvm=crypt-xroot possible_cpus=4 nmi_watchdog=0 kaslr quiet splash cryptopts=target=crypt,source=/dev/sda1,lvm=crypt-xroot possible_cpus=4 nmi_watchdog=0 kaslr vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-17-generic N/A
   linux-backports-modules-4.4.0-17-generic  N/A
   linux-firmware                            1.157
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/14/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6IET85WW (1.45 )
  dmi.board.name: 2516CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6IET85WW(1.45):bd02/14/2013:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2516CTO
  dmi.product.version: ThinkPad T410
  dmi.sys.vendor: LENOVO

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