[Bug 2031541] Re: output from dmesg (log) interferes with login

[Brett Holman]

> What I was expecting was for those outputs during login prompt to be
logged to log file only, to be accessible afterwards via dmesg or
equivalent.

Why do you expect that? This behavior is expected and normal across
various Linux distributions. Output on the serial console is useful for
debugging hardware and software issues that prevent boot, so displaying
kernel log and init system logs to the serial console is standard
behavior on iDrac/iLo/etc.

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https://bugs.launchpad.net/bugs/2031541

Title:
  output from dmesg (log) interferes with login

Status in cloud-init package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Invalid

Bug description:
  On Ubuntu 22.04 Server but also affects earlier releases the login
  prompt gets masked and/or interfered with by outputs from dmesg or log
  outputs on screen. The package being used is version 249.11-0ubuntu3.9
  (systemd) and 23.2.1-0ubuntu0~22.04.1(cloud-init).

  These can come from official software (cloud-init) but also from
  partner's software (e.g. hp-ams and/or amsd). It really interferes
  with logging in through KVM either through remote means or local, but
  not over SSH. Including HPE's iLO and Dell's iDRAC.

  It's especially problematic when trying to type the password after a
  reboot or cold boot.

  What I was expecting was for those outputs during login prompt to be
  logged to log file only, to be accessible afterwards via dmesg or
  equivalent.

  What happened instead was issues with repeated incorrect password or
  username due to the masking of what displayed on screen.

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