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[Launchpad Bug Tracker <1716999@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package partman-auto - 134ubuntu1.3

---------------
partman-auto (134ubuntu1.3) xenial; urgency=medium

  * Bump minimum and maximum sizes for /boot partitions on default, x86, and
    EFI platforms to a minimum of 512Mb and maximum of 768Mb. (LP: #1716999)

 -- Mathieu Trudel-Lapierre <cyphermox@xxxxxxxxxx>  Fri, 06 Jul 2018
12:52:33 -0400

** Changed in: partman-auto (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1716999

Title:
  installer creates rather small /boot partition

Status in partman-auto package in Ubuntu:
  Fix Released
Status in ubiquity package in Ubuntu:
  New
Status in partman-auto source package in Xenial:
  Fix Released
Status in ubiquity source package in Xenial:
  New

Bug description:
  [Impact]
  All new installs of 16.04.

  [Test case]
  1) Install Ubuntu 16.04 on a system
  2) Validate that the size of the /boot partition is greater than or equal to 512MB; should be somewhere between 512MB and 1GB, close to 768MB.

  [Regression potential]
  This may adversely affect installs on tiny disks, by taking up more space for the /boot partition than was previously taken, at the cost of  / or /home. As such, failures to install due to insufficient space on a partition, or failure to partition a disk that was previously working should be investigated as possible regressions.
  This is a corner case in general since there is no requirement to allocate a separate partition for /boot in the default configuration, and if you are using a non-default configuration where /boot must be a separate partition, you probably also don't have a disk so small that an additional 256MB of disk usage is a problem.

  ---

  The installer (in 16.04 and 17.10) creates a separate /boot partition,
  when required, of only 487M. This ends up being rather small when you
  using the following equation to estimate a minimal size allowing for
  reasonable room for further growth.

  (2*(3*kernel + 4*plymouth-carrying initrd + bootloader))

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