[Bug 1930651] [NEW] Ubuntu installer doesn't allow setting swap higher than 2GB

[Stanley Phoong]

Public bug reported:

Installed Ubuntu 18.04 final release and I tried setting up a swap with
the pre-seed config but the swap value fails to go above 2GB.

Here's my configuration:

```
## Partitioning regular
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string regular
d-i partman-auto/choose_recipe select atomic

# Swap Memory
d-i partman-auto/cap-ram string 4096
d-i partman-basicfilesystems/no_swap boolean false
#d-i partman-swapfile/percentage string 50
d-i partman-swapfile/size string 4096

# This makes partman automatically partition without confirmation, provided
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
```

I've seen others facing similar issues and their recommendation was to
use `d-i partman-auto/cap-ram` to configure the value but I've tried
setting it to false as well as a larger value and it still doesn't work.

What we are expected to see if the swap value increase to 4GB as shown
in the pre-seed config.

Possible related issue: https://bugs.launchpad.net/ubuntu/+source
/partman-auto/+bug/1767299

Any help?

** Affects: partman-auto (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1930651

Title:
  Ubuntu installer doesn't allow setting swap higher than 2GB

Status in partman-auto package in Ubuntu:
  New

Bug description:
  Installed Ubuntu 18.04 final release and I tried setting up a swap
  with the pre-seed config but the swap value fails to go above 2GB.

  Here's my configuration:

  ```
  ## Partitioning regular
  d-i partman-auto/disk string /dev/sda
  d-i partman-auto/method string regular
  d-i partman-auto/choose_recipe select atomic

  # Swap Memory
  d-i partman-auto/cap-ram string 4096
  d-i partman-basicfilesystems/no_swap boolean false
  #d-i partman-swapfile/percentage string 50
  d-i partman-swapfile/size string 4096

  # This makes partman automatically partition without confirmation, provided
  d-i partman-partitioning/confirm_write_new_label boolean true
  d-i partman/choose_partition select finish
  d-i partman/confirm boolean true
  d-i partman/confirm_nooverwrite boolean true
  ```

  I've seen others facing similar issues and their recommendation was to
  use `d-i partman-auto/cap-ram` to configure the value but I've tried
  setting it to false as well as a larger value and it still doesn't
  work.

  What we are expected to see if the swap value increase to 4GB as shown
  in the pre-seed config.

  Possible related issue: https://bugs.launchpad.net/ubuntu/+source
  /partman-auto/+bug/1767299

  Any help?

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