[Bug 1696663] [NEW] grub2-common: update-grub shows Warning because of bad /etc/default/grub

[Lenin]

Public bug reported:

update-grub AND update-grub2 shows

Warning: Setting GRUB_TIMEOUT to a non-zero value when
GRUB_HIDDEN_TIMEOUT is set is no longer supported.

Solution:
either set GRUB_TIMEOUT to 0, or remove/comment GRUB_HIDDEN_TIMEOUT in /etc/default/grub

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

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https://bugs.launchpad.net/bugs/1696663

Title:
  grub2-common: update-grub shows Warning because of bad
  /etc/default/grub

Status in grub2 package in Ubuntu:
  New

Bug description:
  update-grub AND update-grub2 shows

  Warning: Setting GRUB_TIMEOUT to a non-zero value when
  GRUB_HIDDEN_TIMEOUT is set is no longer supported.

  Solution:
  either set GRUB_TIMEOUT to 0, or remove/comment GRUB_HIDDEN_TIMEOUT in /etc/default/grub

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