Public bug reported:

The vfat kernel code has two dependencies: the code page (437) and the
iocharset (iso8859-1), and while the former is built-in (like the vfat
code itself), the latter is built as an external module, making vfat
unusable unless the nsl_iso8859-1 ko is available at the moment a vfat
filesystem is mounted.

What is just a discrepancy in the config that we never hit (since we are
shipping the nsl_iso8859-1 .ko in our initrd), became a problem in
kernel derivatives of our -generic kernel (e.g. snappy) where we don't
have any control on the modules people pack in their initrd, and in case
the boot partition is a vfat partition that is being mounted during the
boot.

For this reason, i propose to fix the root problem and turn
CONFIG_NLS_ISO8859_1=y to make the vfat code completely independent on
any external factor.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

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https://bugs.launchpad.net/bugs/1677230

Title:
  vfat: missing iso8859-1 charset

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  The vfat kernel code has two dependencies: the code page (437) and the
  iocharset (iso8859-1), and while the former is built-in (like the vfat
  code itself), the latter is built as an external module, making vfat
  unusable unless the nsl_iso8859-1 ko is available at the moment a vfat
  filesystem is mounted.

  What is just a discrepancy in the config that we never hit (since we
  are shipping the nsl_iso8859-1 .ko in our initrd), became a problem in
  kernel derivatives of our -generic kernel (e.g. snappy) where we don't
  have any control on the modules people pack in their initrd, and in
  case the boot partition is a vfat partition that is being mounted
  during the boot.

  For this reason, i propose to fix the root problem and turn
  CONFIG_NLS_ISO8859_1=y to make the vfat code completely independent on
  any external factor.

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