[Bug 1053368] [NEW] grub-pc.config failed to retrieve and apply debconf database config

[molostoff]

Public bug reported:

debconf stored parameters in  configdb are ignored by /var/lib/dpkg/info
/grub-pc.config at 'dpkg-reconfigure -f noninteractive grub-pc'

Instead of apply configdb parameters (that are stored there before) the
script in /var/lib/dpkg/info/grub-pc.config unconditionally updates them
with parameters extracted from /etc/default/grub

The intended behaviour in this case I suppose to extract parameters from
configdb or any other source and set them to their defaults or any
desired value, to be used in  /etc/default/grub , but the script does
exactly the opposite: overwrites source data. Then, debconf uses
configdb to apply these "new" old parameters again, and as a result I
have configdb wiped with values from /etc/default/grub, and
/etc/default/grub itself stays unchanged.

So the consequence this behaviour has two penalties: original
configuration data (a source) wiped out, actual grub config (target)
stays unchanged.

I have placed 'exit 0' at the beginning of this script and all things
became right -  /etc/default/grub updated, debconf database holds
intended data.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1053368

Title:
  grub-pc.config failed to retrieve and apply debconf database config

Status in “grub2” package in Ubuntu:
  New

Bug description:
  debconf stored parameters in  configdb are ignored by
  /var/lib/dpkg/info/grub-pc.config at 'dpkg-reconfigure -f
  noninteractive grub-pc'

  Instead of apply configdb parameters (that are stored there before)
  the script in /var/lib/dpkg/info/grub-pc.config unconditionally
  updates them with parameters extracted from /etc/default/grub

  The intended behaviour in this case I suppose to extract parameters
  from configdb or any other source and set them to their defaults or
  any desired value, to be used in  /etc/default/grub , but the script
  does exactly the opposite: overwrites source data. Then, debconf uses
  configdb to apply these "new" old parameters again, and as a result I
  have configdb wiped with values from /etc/default/grub, and
  /etc/default/grub itself stays unchanged.

  So the consequence this behaviour has two penalties: original
  configuration data (a source) wiped out, actual grub config (target)
  stays unchanged.

  I have placed 'exit 0' at the beginning of this script and all things
  became right -  /etc/default/grub updated, debconf database holds
  intended data.

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