[Bug 1767299] Re: Ubuntu 18.04 Installer creates swap partition too small

[dragon788]

It can also depend whether you have a discrete GPU or not, as sometimes
those don't properly power off and eat a lot more battery when running
and possibly when suspended. I frequently take my laptop home in case
the on-call phone rings, and if I suspend on a Thursday/Friday and I
don't pull it out of my bag and plug it in, if it is a holiday weekend I
may pull it out and have the battery at 10% or less, which doesn't last
long once you get on VPN and have the CPU crunching away at encryption,
and having a fully encrypted disk also eats more battery (and makes it
harder to do the LVM resize mentioned above).

I'm testing the above mentioned flag and it does appear to at least
create the correctly sized partition, though I'm not sure whether for a
32GB RAM system simply doubling 16384 is the right route or if I need to
add a little more space for overhead in order to hibernate correctly if
the RAM is full or close to full capacity when attempting to hibernate.

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https://bugs.launchpad.net/bugs/1767299

Title:
  Ubuntu 18.04 Installer creates swap partition too small

Status in partman-auto package in Ubuntu:
  Opinion

Bug description:
  Installed Ubuntu 18.04 final release.

  The disk is 512 Gigabyte, the RAM is 8 Gigabyte. The installer just
  gave me 979 Megabyte of space. I chose LVM to have an encrypted drive.

  Here are some details:

  free -h
                total        used        free      shared  buff/cache   available
  Mem:           7,7G        4,0G        152M        399M        3,6G        3,0G
  Swap:          979M          0B        979M


  swapon --show
  NAME      TYPE      SIZE USED PRIO
  /dev/dm-2 partition 980M   0B   -2

  
  cat /etc/fstab
  # /etc/fstab: static file system information.
  #
  # Use 'blkid' to print the universally unique identifier for a
  # device; this may be used with UUID= as a more robust way to name devices
  # that works even if disks are added and removed. See fstab(5).
  #
  # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  /dev/mapper/ubuntu--vg-root /               ext4    errors=remount-ro 0       1
  # /boot was on /dev/sda2 during installation
  UUID=removed-id /boot           ext4    defaults        0       2
  # /boot/efi was on /dev/sda1 during installation
  UUID=removed-id  /boot/efi       vfat    umask=0077      0       1
  /dev/mapper/ubuntu--vg-swap_1 none            swap    sw              0       0

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