[Bug 1544595] [NEW] dmesg man page misleading on -d -t switches

[Thomas Mack]

Public bug reported:

man dmesg states under the '-d, --show-delta' section:

Display the timestamp and the time delta spent between messages.  If
used together with --notime then only the time delta without the
timestamp is printed.

This is not sufficient: --notime or -t has to be used BEFORE -d switch,
otherwise also the delta times will be removed from output.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: util-linux 2.26.2-6ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Feb 11 15:51:49 2016
InstallationDate: Installed on 2013-01-14 (1123 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
SourcePackage: util-linux
UpgradeStatus: Upgraded to wily on 2015-11-13 (90 days ago)

** Affects: util-linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug wily

** Description changed:

  man dmesg states under the '-d, --show-delta' section:
  
  Display the timestamp and the time delta spent between messages.  If
  used together with --notime then only the time delta without the
  timestamp is printed.
  
  This is not sufficient: --notime or -t has to be used BEFORE -d switch,
- otherwise -d also the delta times will be removed from output.
+ otherwise also the delta times will be removed from output.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: util-linux 2.26.2-6ubuntu3
  ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
  Uname: Linux 4.2.0-27-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Thu Feb 11 15:51:49 2016
  InstallationDate: Installed on 2013-01-14 (1123 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  SourcePackage: util-linux
  UpgradeStatus: Upgraded to wily on 2015-11-13 (90 days ago)

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https://bugs.launchpad.net/bugs/1544595

Title:
  dmesg man page misleading on -d -t switches

Status in util-linux package in Ubuntu:
  New

Bug description:
  man dmesg states under the '-d, --show-delta' section:

  Display the timestamp and the time delta spent between messages.  If
  used together with --notime then only the time delta without the
  timestamp is printed.

  This is not sufficient: --notime or -t has to be used BEFORE -d
  switch, otherwise also the delta times will be removed from output.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: util-linux 2.26.2-6ubuntu3
  ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
  Uname: Linux 4.2.0-27-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Thu Feb 11 15:51:49 2016
  InstallationDate: Installed on 2013-01-14 (1123 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  SourcePackage: util-linux
  UpgradeStatus: Upgraded to wily on 2015-11-13 (90 days ago)

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