[Bug 1870316] Re: 'sudo hwclock -s' fails with 'settimeofday() failed: Invalid argument'

[Mauricio Faria de Oliveira]

Rik, thanks for reporting this bug.
You're right, it's a regression in hwclock between glibc 2.30/2.31.
It's fixed in util-linux upstream; preparing a debdiff for Focal.

...

$ lsb_release -cs
focal

Older glibc:
---

$ dpkg -s util-linux libc6 | grep ^Version:
Version: 2.34-0.1ubuntu8
Version: 2.30-0ubuntu3

$ sudo hwclock -s
$ echo $?
0

Newer glibc:
---

$ sudo apt install libc6
.
The following packages will be upgraded:
  libc-bin libc-dev-bin libc6 libc6-dev locales
.

$ dpkg -s util-linux libc6 | grep ^Version:
Version: 2.34-0.1ubuntu8
Version: 2.31-0ubuntu6

$ sudo hwclock -s
hwclock: settimeofday() failed: Invalid argument
$ echo $?
1

Upstream:
---

This is fixed with this upstream commit.
Preparing a debdiff for Focal.

ubuntu at focal:~/util-linux$ sudo ./hwclock -s
$ echo $?
0

commit cd781c405be82540484da3bfe3d3f17a39b8eb5c
Author: J William Piggott <elseifthen at gmx.com>
Date:   Fri Feb 21 20:03:47 2020 -0500

    hwclock: make glibc 2.31 compatible


** Changed in: util-linux (Ubuntu)
       Status: New => Confirmed

** Changed in: util-linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: util-linux (Ubuntu)
   Importance: Medium => High

** Changed in: util-linux (Ubuntu)
     Assignee: (unassigned) => Mauricio Faria de Oliveira (mfo)

** Tags added: sts-sponsor-mfo

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https://bugs.launchpad.net/bugs/1870316

Title:
  'sudo hwclock -s' fails with 'settimeofday() failed: Invalid argument'

Status in util-linux package in Ubuntu:
  Confirmed

Bug description:
  In Focal VM.
  util-linux: 2.34-0.1ubuntu8

  $ sudo hwclock -s
  [sudo] password for focal: 
  hwclock: settimeofday() failed: Invalid argument

  Result should be syncing the time to the RTC, which until recently
  (possibly before glibc update) worked.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: util-linux 2.34-0.1ubuntu8
  ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
  Uname: Linux 5.4.0-18-generic x86_64
  ApportVersion: 2.20.11-0ubuntu22
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Thu Apr  2 11:20:45 2020
  InstallationDate: Installed on 2019-12-24 (99 days ago)
  InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20191224)
  SourcePackage: util-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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