[Bug 2055294] Re: /usr/lib/grub/grub-multi-install fails on noble-daily

[Alex Wang]

Couple of questions:
1.sounds like this is a catastrophic issue that block fresh Ubuntu 24.04 Beta installation, isn't it?
2. so we have to wait for the new ISO image that includes the new grub2? If yes, when do we expect to get the new ISO image. Now we are doing some early evaluation work for Ubuntu 24.04 Beta with a tight schedule. It would be greatly helpful if there is a workaround. Thanks.

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https://bugs.launchpad.net/bugs/2055294

Title:
  /usr/lib/grub/grub-multi-install fails on noble-daily

Status in subiquity:
  Invalid
Status in grub2 package in Ubuntu:
  Fix Committed

Bug description:
  I am using subiquity to install the current noble daily ISO (server).

  Subiquity failed the step called "installing grub to target devices"
  and the logs show that /usr/lib/grub/grub-multi-install failed
  silently with exit status 10.

  When running the script with `set -x`, we see the following, which
  seem to indicate that the absence of a debconf selection variable is
  causing trouble:

  + set -e
  + . /usr/share/debconf/confmodule
  ++ '[' '!' '' ']'
  ++ PERL_DL_NONLAZY=1
  ++ export PERL_DL_NONLAZY
  ++ '[' '' ']'
  ++ exec /usr/share/debconf/frontend /usr/lib/grub/grub-multi-install
  + set -e
  + . /usr/share/debconf/confmodule
  ++ '[' '!' 1 ']'
  ++ '[' -z '' ']'
  ++ exec
  ++ '[' '' ']'
  ++ exec
  ++ DEBCONF_REDIR=1
  ++ export DEBCONF_REDIR
  ++ dpkg-query --control-path grub-common templates
  + db_x_loadtemplatefile /var/lib/dpkg/info/grub-common.templates grub-common
  + _db_cmd 'X_LOADTEMPLATEFILE /var/lib/dpkg/info/grub-common.templates' grub-common
  + _db_internal_IFS='     
  '
  + IFS=' '
  + printf '%s\n' 'X_LOADTEMPLATEFILE /var/lib/dpkg/info/grub-common.templates grub-common'
  + IFS='
  '
  + read -r _db_internal_line
  + IFS='     
  '
  + RET=0
  + case ${_db_internal_line%%[     ]*} in
  + return 0
  + cached_available_ids=
  + db_get grub-efi/cloud_style_installation
  + _db_cmd 'GET grub-efi/cloud_style_installation'
  + _db_internal_IFS='     
  '
  + IFS=' '
  + printf '%s\n' 'GET grub-efi/cloud_style_installation'
  + IFS='
  '
  + read -r _db_internal_line
  + IFS='     
  '
  + RET='10 grub-efi/cloud_style_installation doesn'\''t exist'
  + case ${_db_internal_line%%[     ]*} in
  + return 10

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