[Bug 1952353] Re: dmesg: read kernel buffer failed: Operation not permitted

[Marji Cermak]

I can now see that the dmesg command - starting with Ubuntu 21.10 - is NOT meant to work for the users in "adm" group. It is now meant to be run as admin or with sudo. This is a security decision.
Described in here: https://ruffell.nz/programming/writeups/2020/10/24/getting-dmesg-restrict-enabled-in-ubuntu-groovy.html

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Title:
  dmesg: read kernel buffer failed: Operation not permitted

Status in util-linux package in Ubuntu:
  Invalid

Bug description:
  Run /bin/dmesg, get:

      dmesg: read kernel buffer failed: Operation not permitted

  sudo dmesg works, but I should not have to do that.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: util-linux 2.36.1-8ubuntu2
  ProcVersionSignature: Ubuntu 5.13.0-21.21-generic 5.13.18
  Uname: Linux 5.13.0-21-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu71
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: XFCE
  Date: Thu Nov 25 11:13:58 2021
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   SHELL=/bin/tcsh
  SourcePackage: util-linux
  UpgradeStatus: Upgraded to impish on 2021-11-21 (3 days ago)

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